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- Committer: Teddy Hogeborn
- Date: 2009-09-05 01:46:42 UTC
- mto: (24.1.139 mandos) (237.12.2 mandos-persistent) (299.1.1 release) (300.1.1 release) (301.1.1 release)
- mto: This revision was merged to the branch mainline in revision 264.
- Revision ID: teddy@fukt.bsnet.se-20090905014642-36108sqop1ci0z0m
* plugins.d/mandos-client.c (start_mandos_communication): Check
"quit_now"
throughout.
Always close
socket and
deinit GnuTLS
properly.
(browse_callback): Return immediately if "quit_now" is set.
"quit_now"
throughout.
Always close
socket and
deinit GnuTLS
properly.
(browse_callback): Return immediately if "quit_now" is set.
- files removed:
- DBUS-API
- debian/source
- debian/upstream
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
plugin-runner.c
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
1
/* -*- coding: utf-8 -*- */
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2008-2016 Teddy Hogeborn
6
* Copyright © 2008-2016 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, pipe2() */
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> /* fstat(), struct stat, waitpid(),
34
WIFEXITED(), WEXITSTATUS(), wait(),
35
pid_t, uid_t, gid_t, getuid(),
36
getgid() */
31
#include <stdio.h> /* perror, fileno(), fprintf(),
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, opendir(), stat(), struct
34
stat, waitpid(), WIFEXITED(),
35
WEXITSTATUS(), wait(), pid_t,
36
uid_t, gid_t, getuid(), getgid(),
37
dirfd() */
37
38
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
38
39
FD_SET(), FD_ISSET(), FD_CLR */
39
40
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
40
WEXITSTATUS(), WTERMSIG() */
41
#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
41
WEXITSTATUS(), WTERMSIG(),
42
WCOREDUMP() */
43
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
42
44
#include <iso646.h> /* and, or, not */
43
#include <dirent.h> /* struct dirent, scandirat() */
44
#include <unistd.h> /* fcntl(), F_GETFD, F_SETFD,
45
FD_CLOEXEC, write(), STDOUT_FILENO,
46
struct stat, fstat(), close(),
47
setgid(), setuid(), S_ISREG(),
48
faccessat() pipe2(), fork(),
49
_exit(), dup2(), fexecve(), read()
50
*/
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() */
51
54
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
52
FD_CLOEXEC, openat(), scandirat(),
53
pipe2() */
54
#include <string.h> /* strsep, strlen(), strsignal(),
55
strcmp(), strncmp() */
55
FD_CLOEXEC */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal() */
56
58
#include <errno.h> /* errno */
57
59
#include <argp.h> /* struct argp_option, struct
58
60
argp_state, struct argp,
66
68
*/
67
69
#include <errno.h> /* errno, EBADF */
68
70
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
69
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,
70
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
71
#include <errno.h> /* errno */
72
#include <error.h> /* error() */
73
#include <fnmatch.h> /* fnmatch() */
74
71
75
72
#define BUFFER_SIZE 256
76
73
77
74
#define PDIR "/lib/mandos/plugins.d"
78
#define PHDIR "/lib/mandos/plugin-helpers"
79
75
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
80
76
81
77
const char *argp_program_version = "plugin-runner " VERSION;
82
const char *argp_program_bug_address = "<mandos@recompile.se>";
78
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
83
79
84
80
typedef struct plugin{
85
81
char *name; /* can be NULL or any plugin name */
105
101
106
102
/* Gets an existing plugin based on name,
107
103
or if none is found, creates a new one */
108
__attribute__((warn_unused_result))
109
104
static plugin *getplugin(char *name){
110
/* Check for existing plugin with that name */
105
/* Check for exiting plugin with that name */
111
106
for(plugin *p = plugin_list; p != NULL; p = p->next){
112
107
if((p->name == name)
113
108
or (p->name and name and (strcmp(p->name, name) == 0))){
115
110
}
116
111
}
117
112
/* Create a new plugin */
118
plugin *new_plugin = NULL;
119
do {
120
new_plugin = malloc(sizeof(plugin));
121
} while(new_plugin == NULL and errno == EINTR);
113
plugin *new_plugin = malloc(sizeof(plugin));
122
114
if(new_plugin == NULL){
123
115
return NULL;
124
116
}
125
117
char *copy_name = NULL;
126
118
if(name != NULL){
127
do {
128
copy_name = strdup(name);
129
} while(copy_name == NULL and errno == EINTR);
119
copy_name = strdup(name);
130
120
if(copy_name == NULL){
131
int e = errno;
132
121
free(new_plugin);
133
errno = e;
134
122
return NULL;
135
123
}
136
124
}
140
128
.disabled = false,
141
129
.next = plugin_list };
142
130
143
do {
144
new_plugin->argv = malloc(sizeof(char *) * 2);
145
} while(new_plugin->argv == NULL and errno == EINTR);
131
new_plugin->argv = malloc(sizeof(char *) * 2);
146
132
if(new_plugin->argv == NULL){
147
int e = errno;
148
133
free(copy_name);
149
134
free(new_plugin);
150
errno = e;
151
135
return NULL;
152
136
}
153
137
new_plugin->argv[0] = copy_name;
154
138
new_plugin->argv[1] = NULL;
155
139
156
do {
157
new_plugin->environ = malloc(sizeof(char *));
158
} while(new_plugin->environ == NULL and errno == EINTR);
140
new_plugin->environ = malloc(sizeof(char *));
159
141
if(new_plugin->environ == NULL){
160
int e = errno;
161
142
free(copy_name);
162
143
free(new_plugin->argv);
163
144
free(new_plugin);
164
errno = e;
165
145
return NULL;
166
146
}
167
147
new_plugin->environ[0] = NULL;
172
152
}
173
153
174
154
/* Helper function for add_argument and add_environment */
175
__attribute__((nonnull, warn_unused_result))
176
155
static bool add_to_char_array(const char *new, char ***array,
177
156
int *len){
178
157
/* Resize the pointed-to array to hold one more pointer */
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);
158
*array = realloc(*array, sizeof(char *)
159
* (size_t) ((*len) + 2));
184
160
/* Malloc check */
185
if(new_array == NULL){
161
if(*array == NULL){
186
162
return false;
187
163
}
188
*array = new_array;
189
164
/* Make a copy of the new string */
190
char *copy;
191
do {
192
copy = strdup(new);
193
} while(copy == NULL and errno == EINTR);
165
char *copy = strdup(new);
194
166
if(copy == NULL){
195
167
return false;
196
168
}
203
175
}
204
176
205
177
/* Add to a plugin's argument vector */
206
__attribute__((nonnull(2), warn_unused_result))
207
178
static bool add_argument(plugin *p, const char *arg){
208
179
if(p == NULL){
209
180
return false;
212
183
}
213
184
214
185
/* Add to a plugin's environment */
215
__attribute__((nonnull(2), warn_unused_result))
216
186
static bool add_environment(plugin *p, const char *def, bool replace){
217
187
if(p == NULL){
218
188
return false;
220
190
/* namelen = length of name of environment variable */
221
191
size_t namelen = (size_t)(strchrnul(def, '=') - def);
222
192
/* Search for this environment variable */
223
for(char **envdef = p->environ; *envdef != NULL; envdef++){
224
if(strncmp(*envdef, def, namelen + 1) == 0){
193
for(char **e = p->environ; *e != NULL; e++){
194
if(strncmp(*e, def, namelen + 1) == 0){
225
195
/* It already exists */
226
196
if(replace){
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){
197
char *new = realloc(*e, strlen(def) + 1);
198
if(new == NULL){
232
199
return false;
233
200
}
234
*envdef = new_envdef;
235
strcpy(*envdef, def);
201
*e = new;
202
strcpy(*e, def);
236
203
}
237
204
return true;
238
205
}
240
207
return add_to_char_array(def, &(p->environ), &(p->envc));
241
208
}
242
209
243
#ifndef O_CLOEXEC
244
210
/*
245
211
* Based on the example in the GNU LibC manual chapter 13.13 "File
246
212
* Descriptor Flags".
247
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
213
* *Note File Descriptor Flags:(libc)Descriptor Flags.
248
214
*/
249
__attribute__((warn_unused_result))
250
215
static int set_cloexec_flag(int fd){
251
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
216
int ret = fcntl(fd, F_GETFD, 0);
252
217
/* If reading the flags failed, return error indication now. */
253
218
if(ret < 0){
254
219
return ret;
255
220
}
256
221
/* Store modified flag word in the descriptor. */
257
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
258
ret | FD_CLOEXEC));
222
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
259
223
}
260
#endif /* not O_CLOEXEC */
261
224
262
225
263
226
/* Mark processes as completed when they exit, and save their exit
277
240
/* No child processes */
278
241
break;
279
242
}
280
error(0, errno, "waitpid");
243
perror("waitpid");
281
244
}
282
245
283
246
/* A child exited, find it in process_list */
295
258
}
296
259
297
260
/* Prints out a password to stdout */
298
__attribute__((nonnull, warn_unused_result))
299
261
static bool print_out_password(const char *buffer, size_t length){
300
262
ssize_t ret;
301
263
for(size_t written = 0; written < length; written += (size_t)ret){
309
271
}
310
272
311
273
/* Removes and free a plugin from the plugin list */
312
__attribute__((nonnull))
313
274
static void free_plugin(plugin *plugin_node){
314
275
315
276
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
347
308
348
309
int main(int argc, char *argv[]){
349
310
char *plugindir = NULL;
350
char *pluginhelperdir = NULL;
351
311
char *argfile = NULL;
352
312
FILE *conffp;
353
struct dirent **direntries = NULL;
313
size_t d_name_len;
314
DIR *dir = NULL;
315
struct dirent *dirst;
354
316
struct stat st;
355
317
fd_set rfds_all;
356
318
int ret, maxfd = 0;
357
319
ssize_t sret;
320
intmax_t tmpmax;
358
321
uid_t uid = 65534;
359
322
gid_t gid = 65534;
360
323
bool debug = false;
364
327
.sa_flags = SA_NOCLDSTOP };
365
328
char **custom_argv = NULL;
366
329
int custom_argc = 0;
367
int dir_fd = -1;
368
330
369
331
/* Establish a signal handler */
370
332
sigemptyset(&sigchld_action.sa_mask);
371
333
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
372
334
if(ret == -1){
373
error(0, errno, "sigaddset");
374
exitstatus = EX_OSERR;
335
perror("sigaddset");
336
exitstatus = EXIT_FAILURE;
375
337
goto fallback;
376
338
}
377
339
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
378
340
if(ret == -1){
379
error(0, errno, "sigaction");
380
exitstatus = EX_OSERR;
341
perror("sigaction");
342
exitstatus = EXIT_FAILURE;
381
343
goto fallback;
382
344
}
383
345
415
377
.doc = "Group ID the plugins will run as", .group = 3 },
416
378
{ .name = "debug", .key = 132,
417
379
.doc = "Debug mode", .group = 4 },
418
{ .name = "plugin-helper-dir", .key = 133,
419
.arg = "DIRECTORY",
420
.doc = "Specify a different plugin helper directory",
421
.group = 2 },
422
/*
423
* These reproduce what we would get without ARGP_NO_HELP
424
*/
425
{ .name = "help", .key = '?',
426
.doc = "Give this help list", .group = -1 },
427
{ .name = "usage", .key = -3,
428
.doc = "Give a short usage message", .group = -1 },
429
{ .name = "version", .key = 'V',
430
.doc = "Print program version", .group = -1 },
431
380
{ .name = NULL }
432
381
};
433
382
434
__attribute__((nonnull(3)))
435
error_t parse_opt(int key, char *arg, struct argp_state *state){
436
errno = 0;
383
error_t parse_opt(int key, char *arg, __attribute__((unused))
384
struct argp_state *state){
385
char *tmp;
437
386
switch(key){
438
char *tmp;
439
intmax_t tmp_id;
440
387
case 'g': /* --global-options */
441
{
388
if(arg != NULL){
442
389
char *plugin_option;
443
390
while((plugin_option = strsep(&arg, ",")) != NULL){
391
if(plugin_option[0] == '\0'){
392
continue;
393
}
444
394
if(not add_argument(getplugin(NULL), plugin_option)){
445
break;
395
perror("add_argument");
396
return ARGP_ERR_UNKNOWN;
446
397
}
447
398
}
448
errno = 0;
449
399
}
450
400
break;
451
401
case 'G': /* --global-env */
452
if(add_environment(getplugin(NULL), arg, true)){
453
errno = 0;
402
if(arg == NULL){
403
break;
404
}
405
if(not add_environment(getplugin(NULL), arg, true)){
406
perror("add_environment");
454
407
}
455
408
break;
456
409
case 'o': /* --options-for */
457
{
458
char *option_list = strchr(arg, ':');
459
if(option_list == NULL){
460
argp_error(state, "No colon in \"%s\"", arg);
461
errno = EINVAL;
462
break;
463
}
464
*option_list = '\0';
465
option_list++;
466
if(arg[0] == '\0'){
467
argp_error(state, "Empty plugin name");
468
errno = EINVAL;
469
break;
470
}
471
char *option;
472
while((option = strsep(&option_list, ",")) != NULL){
473
if(not add_argument(getplugin(arg), option)){
474
break;
410
if(arg != NULL){
411
char *plugin_name = strsep(&arg, ":");
412
if(plugin_name[0] == '\0'){
413
break;
414
}
415
char *plugin_option;
416
while((plugin_option = strsep(&arg, ",")) != NULL){
417
if(not add_argument(getplugin(plugin_name), plugin_option)){
418
perror("add_argument");
419
return ARGP_ERR_UNKNOWN;
475
420
}
476
421
}
477
errno = 0;
478
422
}
479
423
break;
480
424
case 'E': /* --env-for */
425
if(arg == NULL){
426
break;
427
}
481
428
{
482
429
char *envdef = strchr(arg, ':');
483
430
if(envdef == NULL){
484
argp_error(state, "No colon in \"%s\"", arg);
485
errno = EINVAL;
486
431
break;
487
432
}
488
433
*envdef = '\0';
489
envdef++;
490
if(arg[0] == '\0'){
491
argp_error(state, "Empty plugin name");
492
errno = EINVAL;
493
break;
494
}
495
if(add_environment(getplugin(arg), envdef, true)){
496
errno = 0;
434
if(not add_environment(getplugin(arg), envdef+1, true)){
435
perror("add_environment");
497
436
}
498
437
}
499
438
break;
500
439
case 'd': /* --disable */
501
{
440
if(arg != NULL){
502
441
plugin *p = getplugin(arg);
503
if(p != NULL){
504
p->disabled = true;
505
errno = 0;
442
if(p == NULL){
443
return ARGP_ERR_UNKNOWN;
506
444
}
445
p->disabled = true;
507
446
}
508
447
break;
509
448
case 'e': /* --enable */
510
{
449
if(arg != NULL){
511
450
plugin *p = getplugin(arg);
512
if(p != NULL){
513
p->disabled = false;
514
errno = 0;
451
if(p == NULL){
452
return ARGP_ERR_UNKNOWN;
515
453
}
454
p->disabled = false;
516
455
}
517
456
break;
518
457
case 128: /* --plugin-dir */
519
458
free(plugindir);
520
459
plugindir = strdup(arg);
521
if(plugindir != NULL){
522
errno = 0;
460
if(plugindir == NULL){
461
perror("strdup");
523
462
}
524
463
break;
525
464
case 129: /* --config-file */
526
465
/* This is already done by parse_opt_config_file() */
527
466
break;
528
467
case 130: /* --userid */
529
tmp_id = strtoimax(arg, &tmp, 10);
468
errno = 0;
469
tmpmax = strtoimax(arg, &tmp, 10);
530
470
if(errno != 0 or tmp == arg or *tmp != '\0'
531
or tmp_id != (uid_t)tmp_id){
532
argp_error(state, "Bad user ID number: \"%s\", using %"
533
PRIdMAX, arg, (intmax_t)uid);
534
break;
471
or tmpmax != (uid_t)tmpmax){
472
fprintf(stderr, "Bad user ID number: \"%s\", using %"
473
PRIdMAX "\n", arg, (intmax_t)uid);
474
} else {
475
uid = (uid_t)tmpmax;
535
476
}
536
uid = (uid_t)tmp_id;
537
errno = 0;
538
477
break;
539
478
case 131: /* --groupid */
540
tmp_id = strtoimax(arg, &tmp, 10);
479
errno = 0;
480
tmpmax = strtoimax(arg, &tmp, 10);
541
481
if(errno != 0 or tmp == arg or *tmp != '\0'
542
or tmp_id != (gid_t)tmp_id){
543
argp_error(state, "Bad group ID number: \"%s\", using %"
544
PRIdMAX, arg, (intmax_t)gid);
545
break;
482
or tmpmax != (gid_t)tmpmax){
483
fprintf(stderr, "Bad group ID number: \"%s\", using %"
484
PRIdMAX "\n", arg, (intmax_t)gid);
485
} else {
486
gid = (gid_t)tmpmax;
546
487
}
547
gid = (gid_t)tmp_id;
548
errno = 0;
549
488
break;
550
489
case 132: /* --debug */
551
490
debug = true;
552
491
break;
553
case 133: /* --plugin-helper-dir */
554
free(pluginhelperdir);
555
pluginhelperdir = strdup(arg);
556
if(pluginhelperdir != NULL){
557
errno = 0;
558
}
559
break;
560
/*
561
* These reproduce what we would get without ARGP_NO_HELP
562
*/
563
case '?': /* --help */
564
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
565
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
566
case -3: /* --usage */
567
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
568
argp_state_help(state, state->out_stream,
569
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
570
case 'V': /* --version */
571
fprintf(state->out_stream, "%s\n", argp_program_version);
572
exit(EXIT_SUCCESS);
573
break;
574
492
/*
575
493
* When adding more options before this line, remember to also add a
576
494
* "case" to the "parse_opt_config_file" function below.
579
497
/* Cryptsetup always passes an argument, which is an empty
580
498
string if "none" was specified in /etc/crypttab. So if
581
499
argument was empty, we ignore it silently. */
582
if(arg[0] == '\0'){
583
break;
500
if(arg[0] != '\0'){
501
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
584
502
}
503
break;
504
case ARGP_KEY_END:
505
break;
585
506
default:
586
507
return ARGP_ERR_UNKNOWN;
587
508
}
588
return errno; /* Set to 0 at start */
509
return 0;
589
510
}
590
511
591
512
/* This option parser is the same as parse_opt() above, except it
593
514
error_t parse_opt_config_file(int key, char *arg,
594
515
__attribute__((unused))
595
516
struct argp_state *state){
596
errno = 0;
597
517
switch(key){
598
518
case 'g': /* --global-options */
599
519
case 'G': /* --global-env */
606
526
case 129: /* --config-file */
607
527
free(argfile);
608
528
argfile = strdup(arg);
609
if(argfile != NULL){
610
errno = 0;
529
if(argfile == NULL){
530
perror("strdup");
611
531
}
612
532
break;
613
533
case 130: /* --userid */
614
534
case 131: /* --groupid */
615
535
case 132: /* --debug */
616
case 133: /* --plugin-helper-dir */
617
case '?': /* --help */
618
case -3: /* --usage */
619
case 'V': /* --version */
620
536
case ARGP_KEY_ARG:
537
case ARGP_KEY_END:
621
538
break;
622
539
default:
623
540
return ARGP_ERR_UNKNOWN;
624
541
}
625
return errno;
542
return 0;
626
543
}
627
544
628
545
struct argp argp = { .options = options,
632
549
633
550
/* Parse using parse_opt_config_file() in order to get the custom
634
551
config file location, if any. */
635
ret = argp_parse(&argp, argc, argv,
636
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
637
NULL, NULL);
638
switch(ret){
639
case 0:
640
break;
641
case ENOMEM:
642
default:
643
errno = ret;
644
error(0, errno, "argp_parse");
645
exitstatus = EX_OSERR;
646
goto fallback;
647
case EINVAL:
648
exitstatus = EX_USAGE;
552
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
553
if(ret == ARGP_ERR_UNKNOWN){
554
fprintf(stderr, "Unknown error while parsing arguments\n");
555
exitstatus = EXIT_FAILURE;
649
556
goto fallback;
650
557
}
651
558
668
575
custom_argc = 1;
669
576
custom_argv = malloc(sizeof(char*) * 2);
670
577
if(custom_argv == NULL){
671
error(0, errno, "malloc");
672
exitstatus = EX_OSERR;
578
perror("malloc");
579
exitstatus = EXIT_FAILURE;
673
580
goto fallback;
674
581
}
675
582
custom_argv[0] = argv[0];
691
598
}
692
599
new_arg = strdup(p);
693
600
if(new_arg == NULL){
694
error(0, errno, "strdup");
695
exitstatus = EX_OSERR;
601
perror("strdup");
602
exitstatus = EXIT_FAILURE;
696
603
free(org_line);
697
604
goto fallback;
698
605
}
699
606
700
607
custom_argc += 1;
701
{
702
char **new_argv = realloc(custom_argv, sizeof(char *)
703
* ((size_t)custom_argc + 1));
704
if(new_argv == NULL){
705
error(0, errno, "realloc");
706
exitstatus = EX_OSERR;
707
free(new_arg);
708
free(org_line);
709
goto fallback;
710
} else {
711
custom_argv = new_argv;
712
}
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;
713
615
}
714
616
custom_argv[custom_argc-1] = new_arg;
715
617
custom_argv[custom_argc] = NULL;
716
618
}
717
619
}
718
do {
719
ret = fclose(conffp);
720
} while(ret == EOF and errno == EINTR);
721
if(ret == EOF){
722
error(0, errno, "fclose");
723
exitstatus = EX_IOERR;
724
goto fallback;
725
}
726
620
free(org_line);
727
621
} else {
728
622
/* Check for harmful errors and go to fallback. Other errors might
729
623
not affect opening plugins */
730
624
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
731
error(0, errno, "fopen");
732
exitstatus = EX_OSERR;
625
perror("fopen");
626
exitstatus = EXIT_FAILURE;
733
627
goto fallback;
734
628
}
735
629
}
736
/* If there were any arguments from the configuration file, pass
737
them to parser as command line arguments */
630
/* If there was any arguments from configuration file,
631
pass them to parser as command arguments */
738
632
if(custom_argv != NULL){
739
ret = argp_parse(&argp, custom_argc, custom_argv,
740
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
741
NULL, NULL);
742
switch(ret){
743
case 0:
744
break;
745
case ENOMEM:
746
default:
747
errno = ret;
748
error(0, errno, "argp_parse");
749
exitstatus = EX_OSERR;
750
goto fallback;
751
case EINVAL:
752
exitstatus = EX_CONFIG;
633
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
634
0, NULL);
635
if(ret == ARGP_ERR_UNKNOWN){
636
fprintf(stderr, "Unknown error while parsing arguments\n");
637
exitstatus = EXIT_FAILURE;
753
638
goto fallback;
754
639
}
755
640
}
756
641
757
642
/* Parse actual command line arguments, to let them override the
758
643
config file */
759
ret = argp_parse(&argp, argc, argv,
760
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
761
NULL, NULL);
762
switch(ret){
763
case 0:
764
break;
765
case ENOMEM:
766
default:
767
errno = ret;
768
error(0, errno, "argp_parse");
769
exitstatus = EX_OSERR;
770
goto fallback;
771
case EINVAL:
772
exitstatus = EX_USAGE;
773
goto fallback;
774
}
775
776
{
777
char *pluginhelperenv;
778
bool bret = true;
779
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
780
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
781
if(ret != -1){
782
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
783
}
784
if(ret == -1 or not bret){
785
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
786
" environment variable to \"%s\" for all plugins\n",
787
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
788
}
789
if(ret != -1){
790
free(pluginhelperenv);
791
}
644
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
645
if(ret == ARGP_ERR_UNKNOWN){
646
fprintf(stderr, "Unknown error while parsing arguments\n");
647
exitstatus = EXIT_FAILURE;
648
goto fallback;
792
649
}
793
650
794
651
if(debug){
795
for(plugin *p = plugin_list; p != NULL; p = p->next){
652
for(plugin *p = plugin_list; p != NULL; p=p->next){
796
653
fprintf(stderr, "Plugin: %s has %d arguments\n",
797
654
p->name ? p->name : "Global", p->argc - 1);
798
655
for(char **a = p->argv; *a != NULL; a++){
805
662
}
806
663
}
807
664
808
if(getuid() == 0){
809
/* Work around Debian bug #633582:
810
<https://bugs.debian.org/633582> */
811
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
812
if(plugindir_fd == -1){
813
if(errno != ENOENT){
814
error(0, errno, "open(\"" PDIR "\")");
815
}
816
} else {
817
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
818
if(ret == -1){
819
error(0, errno, "fstat");
820
} else {
821
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
822
ret = fchown(plugindir_fd, uid, gid);
823
if(ret == -1){
824
error(0, errno, "fchown");
825
}
826
}
827
}
828
close(plugindir_fd);
829
}
830
}
831
832
/* Lower permissions */
833
ret = setgid(gid);
665
/* Strip permissions down to nobody */
666
setgid(gid);
834
667
if(ret == -1){
835
error(0, errno, "setgid");
668
perror("setgid");
836
669
}
837
670
ret = setuid(uid);
838
671
if(ret == -1){
839
error(0, errno, "setuid");
840
}
841
842
/* Open plugin directory with close_on_exec flag */
672
perror("setuid");
673
}
674
675
if(plugindir == NULL){
676
dir = opendir(PDIR);
677
} else {
678
dir = opendir(plugindir);
679
}
680
681
if(dir == NULL){
682
perror("Could not open plugin dir");
683
exitstatus = EXIT_FAILURE;
684
goto fallback;
685
}
686
687
/* Set the FD_CLOEXEC flag on the directory, if possible */
843
688
{
844
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
845
#ifdef O_CLOEXEC
846
O_CLOEXEC
847
#else /* not O_CLOEXEC */
848
0
849
#endif /* not O_CLOEXEC */
850
);
851
if(dir_fd == -1){
852
error(0, errno, "Could not open plugin dir");
853
exitstatus = EX_UNAVAILABLE;
854
goto fallback;
855
}
856
857
#ifndef O_CLOEXEC
858
/* Set the FD_CLOEXEC flag on the directory */
859
ret = set_cloexec_flag(dir_fd);
860
if(ret < 0){
861
error(0, errno, "set_cloexec_flag");
862
exitstatus = EX_OSERR;
863
goto fallback;
864
}
865
#endif /* O_CLOEXEC */
866
}
867
868
int good_name(const struct dirent * const dirent){
869
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
870
"*.dpkg-old", "*.dpkg-bak",
871
"*.dpkg-divert", 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, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
882
!= FNM_NOMATCH){
883
if(debug){
884
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
885
" matching pattern %s\n", dirent->d_name, *pat);
886
}
887
return 0;
689
int dir_fd = dirfd(dir);
690
if(dir_fd >= 0){
691
ret = set_cloexec_flag(dir_fd);
692
if(ret < 0){
693
perror("set_cloexec_flag");
694
exitstatus = EXIT_FAILURE;
695
goto fallback;
888
696
}
889
697
}
890
return 1;
891
}
892
893
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
894
alphasort);
895
if(numplugins == -1){
896
error(0, errno, "Could not scan plugin dir");
897
direntries = NULL;
898
exitstatus = EX_OSERR;
899
goto fallback;
900
698
}
901
699
902
700
FD_ZERO(&rfds_all);
903
701
904
702
/* Read and execute any executable in the plugin directory*/
905
for(int i = 0; i < numplugins; i++){
906
907
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
908
if(plugin_fd == -1){
909
error(0, errno, "Could not open plugin");
910
free(direntries[i]);
703
while(true){
704
dirst = readdir(dir);
705
706
/* All directory entries have been processed */
707
if(dirst == NULL){
708
if(errno == EBADF){
709
perror("readdir");
710
exitstatus = EXIT_FAILURE;
711
goto fallback;
712
}
713
break;
714
}
715
716
d_name_len = strlen(dirst->d_name);
717
718
/* Ignore dotfiles, backup files and other junk */
719
{
720
bool bad_name = false;
721
722
const char const *bad_prefixes[] = { ".", "#", NULL };
723
724
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
725
".dpkg-old",
726
".dpkg-bak",
727
".dpkg-divert", NULL };
728
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
729
size_t pre_len = strlen(*pre);
730
if((d_name_len >= pre_len)
731
and strncmp((dirst->d_name), *pre, pre_len) == 0){
732
if(debug){
733
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
734
" with bad prefix %s\n", dirst->d_name, *pre);
735
}
736
bad_name = true;
737
break;
738
}
739
}
740
if(bad_name){
741
continue;
742
}
743
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
744
size_t suf_len = strlen(*suf);
745
if((d_name_len >= suf_len)
746
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
747
== 0)){
748
if(debug){
749
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
750
" with bad suffix %s\n", dirst->d_name, *suf);
751
}
752
bad_name = true;
753
break;
754
}
755
}
756
757
if(bad_name){
758
continue;
759
}
760
}
761
762
char *filename;
763
if(plugindir == NULL){
764
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
765
} else {
766
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
767
}
768
if(ret < 0){
769
perror("asprintf");
911
770
continue;
912
771
}
913
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
772
773
ret = stat(filename, &st);
914
774
if(ret == -1){
915
error(0, errno, "stat");
916
close(plugin_fd);
917
free(direntries[i]);
775
perror("stat");
776
free(filename);
918
777
continue;
919
778
}
920
779
921
780
/* Ignore non-executable files */
922
if(not S_ISREG(st.st_mode)
923
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
924
X_OK, 0)) != 0)){
781
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
925
782
if(debug){
926
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
927
" with bad type or mode\n",
928
plugindir != NULL ? plugindir : PDIR,
929
direntries[i]->d_name);
783
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
784
" with bad type or mode\n", filename);
930
785
}
931
close(plugin_fd);
932
free(direntries[i]);
786
free(filename);
933
787
continue;
934
788
}
935
789
936
plugin *p = getplugin(direntries[i]->d_name);
790
plugin *p = getplugin(dirst->d_name);
937
791
if(p == NULL){
938
error(0, errno, "getplugin");
939
close(plugin_fd);
940
free(direntries[i]);
792
perror("getplugin");
793
free(filename);
941
794
continue;
942
795
}
943
796
if(p->disabled){
944
797
if(debug){
945
798
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
946
direntries[i]->d_name);
799
dirst->d_name);
947
800
}
948
close(plugin_fd);
949
free(direntries[i]);
801
free(filename);
950
802
continue;
951
803
}
952
804
{
955
807
if(g != NULL){
956
808
for(char **a = g->argv + 1; *a != NULL; a++){
957
809
if(not add_argument(p, *a)){
958
error(0, errno, "add_argument");
810
perror("add_argument");
959
811
}
960
812
}
961
813
/* Add global environment variables */
962
814
for(char **e = g->environ; *e != NULL; e++){
963
815
if(not add_environment(p, *e, false)){
964
error(0, errno, "add_environment");
816
perror("add_environment");
965
817
}
966
818
}
967
819
}
968
820
}
969
/* If this plugin has any environment variables, we need to
970
duplicate the environment from this process, too. */
821
/* If this plugin has any environment variables, we will call
822
using execve and need to duplicate the environment from this
823
process, too. */
971
824
if(p->environ[0] != NULL){
972
825
for(char **e = environ; *e != NULL; e++){
973
826
if(not add_environment(p, *e, false)){
974
error(0, errno, "add_environment");
827
perror("add_environment");
975
828
}
976
829
}
977
830
}
978
831
979
832
int pipefd[2];
980
#ifndef O_CLOEXEC
981
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
982
#else /* O_CLOEXEC */
983
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
984
#endif /* O_CLOEXEC */
833
ret = pipe(pipefd);
985
834
if(ret == -1){
986
error(0, errno, "pipe");
987
exitstatus = EX_OSERR;
988
free(direntries[i]);
989
goto fallback;
990
}
991
if(pipefd[0] >= FD_SETSIZE){
992
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
993
FD_SETSIZE);
994
close(pipefd[0]);
995
close(pipefd[1]);
996
exitstatus = EX_OSERR;
997
free(direntries[i]);
998
goto fallback;
999
}
1000
#ifndef O_CLOEXEC
835
perror("pipe");
836
exitstatus = EXIT_FAILURE;
837
goto fallback;
838
}
1001
839
/* Ask OS to automatic close the pipe on exec */
1002
840
ret = set_cloexec_flag(pipefd[0]);
1003
841
if(ret < 0){
1004
error(0, errno, "set_cloexec_flag");
1005
close(pipefd[0]);
1006
close(pipefd[1]);
1007
exitstatus = EX_OSERR;
1008
free(direntries[i]);
842
perror("set_cloexec_flag");
843
exitstatus = EXIT_FAILURE;
1009
844
goto fallback;
1010
845
}
1011
846
ret = set_cloexec_flag(pipefd[1]);
1012
847
if(ret < 0){
1013
error(0, errno, "set_cloexec_flag");
1014
close(pipefd[0]);
1015
close(pipefd[1]);
1016
exitstatus = EX_OSERR;
1017
free(direntries[i]);
848
perror("set_cloexec_flag");
849
exitstatus = EXIT_FAILURE;
1018
850
goto fallback;
1019
851
}
1020
#endif /* not O_CLOEXEC */
1021
852
/* Block SIGCHLD until process is safely in process list */
1022
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1023
&sigchld_action.sa_mask,
1024
NULL));
853
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1025
854
if(ret < 0){
1026
error(0, errno, "sigprocmask");
1027
exitstatus = EX_OSERR;
1028
free(direntries[i]);
855
perror("sigprocmask");
856
exitstatus = EXIT_FAILURE;
1029
857
goto fallback;
1030
858
}
1031
859
/* Starting a new process to be watched */
1032
pid_t pid;
1033
do {
1034
pid = fork();
1035
} while(pid == -1 and errno == EINTR);
860
pid_t pid = fork();
1036
861
if(pid == -1){
1037
error(0, errno, "fork");
1038
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1039
&sigchld_action.sa_mask, NULL));
1040
close(pipefd[0]);
1041
close(pipefd[1]);
1042
exitstatus = EX_OSERR;
1043
free(direntries[i]);
862
perror("fork");
863
exitstatus = EXIT_FAILURE;
1044
864
goto fallback;
1045
865
}
1046
866
if(pid == 0){
1047
867
/* this is the child process */
1048
868
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1049
869
if(ret < 0){
1050
error(0, errno, "sigaction");
1051
_exit(EX_OSERR);
870
perror("sigaction");
871
_exit(EXIT_FAILURE);
1052
872
}
1053
873
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1054
874
if(ret < 0){
1055
error(0, errno, "sigprocmask");
1056
_exit(EX_OSERR);
875
perror("sigprocmask");
876
_exit(EXIT_FAILURE);
1057
877
}
1058
878
1059
879
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1060
880
if(ret == -1){
1061
error(0, errno, "dup2");
1062
_exit(EX_OSERR);
881
perror("dup2");
882
_exit(EXIT_FAILURE);
1063
883
}
1064
884
1065
if(fexecve(plugin_fd, p->argv,
1066
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1067
error(0, errno, "fexecve for %s/%s",
1068
plugindir != NULL ? plugindir : PDIR,
1069
direntries[i]->d_name);
1070
_exit(EX_OSERR);
885
if(dirfd(dir) < 0){
886
/* If dir has no file descriptor, we could not set FD_CLOEXEC
887
above and must now close it manually here. */
888
closedir(dir);
889
}
890
if(p->environ[0] == NULL){
891
if(execv(filename, p->argv) < 0){
892
perror("execv");
893
_exit(EXIT_FAILURE);
894
}
895
} else {
896
if(execve(filename, p->argv, p->environ) < 0){
897
perror("execve");
898
_exit(EXIT_FAILURE);
899
}
1071
900
}
1072
901
/* no return */
1073
902
}
1074
903
/* Parent process */
1075
904
close(pipefd[1]); /* Close unused write end of pipe */
1076
close(plugin_fd);
1077
plugin *new_plugin = getplugin(direntries[i]->d_name);
905
free(filename);
906
plugin *new_plugin = getplugin(dirst->d_name);
1078
907
if(new_plugin == NULL){
1079
error(0, errno, "getplugin");
1080
ret = (int)(TEMP_FAILURE_RETRY
1081
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1082
NULL)));
908
perror("getplugin");
909
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1083
910
if(ret < 0){
1084
error(0, errno, "sigprocmask");
911
perror("sigprocmask");
1085
912
}
1086
exitstatus = EX_OSERR;
1087
free(direntries[i]);
913
exitstatus = EXIT_FAILURE;
1088
914
goto fallback;
1089
915
}
1090
free(direntries[i]);
1091
916
1092
917
new_plugin->pid = pid;
1093
918
new_plugin->fd = pipefd[0];
1094
919
1095
920
/* Unblock SIGCHLD so signal handler can be run if this process
1096
921
has already completed */
1097
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1098
&sigchld_action.sa_mask,
1099
NULL));
922
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1100
923
if(ret < 0){
1101
error(0, errno, "sigprocmask");
1102
exitstatus = EX_OSERR;
924
perror("sigprocmask");
925
exitstatus = EXIT_FAILURE;
1103
926
goto fallback;
1104
927
}
1105
928
1110
933
}
1111
934
}
1112
935
1113
free(direntries);
1114
direntries = NULL;
1115
close(dir_fd);
1116
dir_fd = -1;
936
closedir(dir);
937
dir = NULL;
1117
938
free_plugin(getplugin(NULL));
1118
939
1119
940
for(plugin *p = plugin_list; p != NULL; p = p->next){
1131
952
while(plugin_list){
1132
953
fd_set rfds = rfds_all;
1133
954
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;
955
if(select_ret == -1){
956
perror("select");
957
exitstatus = EXIT_FAILURE;
1137
958
goto fallback;
1138
959
}
1139
960
/* OK, now either a process completed, or something can be read
1158
979
(intmax_t) (proc->pid),
1159
980
WTERMSIG(proc->status),
1160
981
strsignal(WTERMSIG(proc->status)));
982
} else if(WCOREDUMP(proc->status)){
983
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
984
" core\n", proc->name, (intmax_t) (proc->pid));
1161
985
}
1162
986
}
1163
987
1165
989
FD_CLR(proc->fd, &rfds_all);
1166
990
1167
991
/* Block signal while modifying process_list */
1168
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1169
(SIG_BLOCK,
1170
&sigchld_action.sa_mask,
1171
NULL));
992
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1172
993
if(ret < 0){
1173
error(0, errno, "sigprocmask");
1174
exitstatus = EX_OSERR;
994
perror("sigprocmask");
995
exitstatus = EXIT_FAILURE;
1175
996
goto fallback;
1176
997
}
1177
998
1180
1001
proc = next_plugin;
1181
1002
1182
1003
/* We are done modifying process list, so unblock signal */
1183
ret = (int)(TEMP_FAILURE_RETRY
1184
(sigprocmask(SIG_UNBLOCK,
1185
&sigchld_action.sa_mask, NULL)));
1004
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1005
NULL);
1186
1006
if(ret < 0){
1187
error(0, errno, "sigprocmask");
1188
exitstatus = EX_OSERR;
1007
perror("sigprocmask");
1008
exitstatus = EXIT_FAILURE;
1189
1009
goto fallback;
1190
1010
}
1191
1011
1201
1021
bool bret = print_out_password(proc->buffer,
1202
1022
proc->buffer_length);
1203
1023
if(not bret){
1204
error(0, errno, "print_out_password");
1205
exitstatus = EX_IOERR;
1024
perror("print_out_password");
1025
exitstatus = EXIT_FAILURE;
1206
1026
}
1207
1027
goto fallback;
1208
1028
}
1215
1035
}
1216
1036
/* Before reading, make the process' data buffer large enough */
1217
1037
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1218
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1219
+ (size_t) BUFFER_SIZE);
1220
if(new_buffer == NULL){
1221
error(0, errno, "malloc");
1222
exitstatus = EX_OSERR;
1038
proc->buffer = realloc(proc->buffer, proc->buffer_size
1039
+ (size_t) BUFFER_SIZE);
1040
if(proc->buffer == NULL){
1041
perror("malloc");
1042
exitstatus = EXIT_FAILURE;
1223
1043
goto fallback;
1224
1044
}
1225
proc->buffer = new_buffer;
1226
1045
proc->buffer_size += BUFFER_SIZE;
1227
1046
}
1228
1047
/* Read from the process */
1229
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1230
proc->buffer
1231
+ proc->buffer_length,
1232
BUFFER_SIZE));
1048
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1049
BUFFER_SIZE);
1233
1050
if(sret < 0){
1234
1051
/* Read error from this process; ignore the error */
1235
1052
proc = proc->next;
1247
1064
1248
1065
fallback:
1249
1066
1250
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1251
and exitstatus != EX_OK)){
1067
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1252
1068
/* Fallback if all plugins failed, none are found or an error
1253
1069
occured */
1254
1070
bool bret;
1262
1078
}
1263
1079
bret = print_out_password(passwordbuffer, len);
1264
1080
if(not bret){
1265
error(0, errno, "print_out_password");
1266
exitstatus = EX_IOERR;
1081
perror("print_out_password");
1082
exitstatus = EXIT_FAILURE;
1267
1083
}
1268
1084
}
1269
1085
1270
1086
/* Restore old signal handler */
1271
1087
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1272
1088
if(ret == -1){
1273
error(0, errno, "sigaction");
1274
exitstatus = EX_OSERR;
1089
perror("sigaction");
1090
exitstatus = EXIT_FAILURE;
1275
1091
}
1276
1092
1277
1093
if(custom_argv != NULL){
1281
1097
free(custom_argv);
1282
1098
}
1283
1099
1284
free(direntries);
1285
1286
if(dir_fd != -1){
1287
close(dir_fd);
1100
if(dir != NULL){
1101
closedir(dir);
1288
1102
}
1289
1103
1290
1104
/* Kill the processes */
1294
1108
ret = kill(p->pid, SIGTERM);
1295
1109
if(ret == -1 and errno != ESRCH){
1296
1110
/* Set-uid proccesses might not get closed */
1297
error(0, errno, "kill");
1111
perror("kill");
1298
1112
}
1299
1113
}
1300
1114
}
1301
1115
1302
1116
/* Wait for any remaining child processes to terminate */
1303
do {
1117
do{
1304
1118
ret = wait(NULL);
1305
1119
} while(ret >= 0);
1306
1120
if(errno != ECHILD){
1307
error(0, errno, "wait");
1121
perror("wait");
1308
1122
}
1309
1123
1310
1124
free_plugin_list();
1311
1125
1312
1126
free(plugindir);
1313
free(pluginhelperdir);
1314
1127
free(argfile);
1315
1128
1316
1129
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0