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- Committer: Teddy Hogeborn
- Date: 2015-07-12 01:41:14 UTC
- mto: (237.7.594 trunk)
- mto: This revision was merged to the branch mainline in revision 325.
- Revision ID: teddy@recompile.se-20150712014114-qbala4mutkixxct3
Handle local Zeroconf service name collisions on startup, too.
* mandos (AvahiService.server_state_changed): Catch name collision
error when adding
server.
* mandos (AvahiService.server_state_changed): Catch name collision
error when adding
server.
- files added:
- DBUS-API
- debian/source
- debian/upstream
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
plugin-runner.c
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(), strcmp(), strncmp() */
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
74
78
#define PDIR "/lib/mandos/plugins.d"
79
#define PHDIR "/lib/mandos/plugin-helpers"
75
80
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
76
81
77
82
const char *argp_program_version = "plugin-runner " VERSION;
78
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
83
const char *argp_program_bug_address = "<mandos@recompile.se>";
79
84
80
85
typedef struct plugin{
81
86
char *name; /* can be NULL or any plugin name */
101
106
102
107
/* Gets an existing plugin based on name,
103
108
or if none is found, creates a new one */
109
__attribute__((warn_unused_result))
104
110
static plugin *getplugin(char *name){
105
/* Check for exiting plugin with that name */
111
/* Check for existing plugin with that name */
106
112
for(plugin *p = plugin_list; p != NULL; p = p->next){
107
113
if((p->name == name)
108
114
or (p->name and name and (strcmp(p->name, name) == 0))){
123
129
copy_name = strdup(name);
124
130
} while(copy_name == NULL and errno == EINTR);
125
131
if(copy_name == NULL){
132
int e = errno;
126
133
free(new_plugin);
134
errno = e;
127
135
return NULL;
128
136
}
129
137
}
137
145
new_plugin->argv = malloc(sizeof(char *) * 2);
138
146
} while(new_plugin->argv == NULL and errno == EINTR);
139
147
if(new_plugin->argv == NULL){
148
int e = errno;
140
149
free(copy_name);
141
150
free(new_plugin);
151
errno = e;
142
152
return NULL;
143
153
}
144
154
new_plugin->argv[0] = copy_name;
148
158
new_plugin->environ = malloc(sizeof(char *));
149
159
} while(new_plugin->environ == NULL and errno == EINTR);
150
160
if(new_plugin->environ == NULL){
161
int e = errno;
151
162
free(copy_name);
152
163
free(new_plugin->argv);
153
164
free(new_plugin);
165
errno = e;
154
166
return NULL;
155
167
}
156
168
new_plugin->environ[0] = NULL;
161
173
}
162
174
163
175
/* Helper function for add_argument and add_environment */
176
__attribute__((nonnull, warn_unused_result))
164
177
static bool add_to_char_array(const char *new, char ***array,
165
178
int *len){
166
179
/* Resize the pointed-to array to hold one more pointer */
180
char **new_array = NULL;
167
181
do {
168
*array = realloc(*array, sizeof(char *)
169
* (size_t) ((*len) + 2));
170
} while(*array == NULL and errno == EINTR);
182
new_array = realloc(*array, sizeof(char *)
183
* (size_t) ((*len) + 2));
184
} while(new_array == NULL and errno == EINTR);
171
185
/* Malloc check */
172
if(*array == NULL){
186
if(new_array == NULL){
173
187
return false;
174
188
}
189
*array = new_array;
175
190
/* Make a copy of the new string */
176
191
char *copy;
177
192
do {
189
204
}
190
205
191
206
/* Add to a plugin's argument vector */
207
__attribute__((nonnull(2), warn_unused_result))
192
208
static bool add_argument(plugin *p, const char *arg){
193
209
if(p == NULL){
194
210
return false;
197
213
}
198
214
199
215
/* Add to a plugin's environment */
216
__attribute__((nonnull(2), warn_unused_result))
200
217
static bool add_environment(plugin *p, const char *def, bool replace){
201
218
if(p == NULL){
202
219
return false;
204
221
/* namelen = length of name of environment variable */
205
222
size_t namelen = (size_t)(strchrnul(def, '=') - def);
206
223
/* Search for this environment variable */
207
for(char **e = p->environ; *e != NULL; e++){
208
if(strncmp(*e, def, namelen + 1) == 0){
224
for(char **envdef = p->environ; *envdef != NULL; envdef++){
225
if(strncmp(*envdef, def, namelen + 1) == 0){
209
226
/* It already exists */
210
227
if(replace){
211
char *new;
228
char *new_envdef;
212
229
do {
213
new = realloc(*e, strlen(def) + 1);
214
} while(new == NULL and errno == EINTR);
215
if(new == NULL){
230
new_envdef = realloc(*envdef, strlen(def) + 1);
231
} while(new_envdef == NULL and errno == EINTR);
232
if(new_envdef == NULL){
216
233
return false;
217
234
}
218
*e = new;
219
strcpy(*e, def);
235
*envdef = new_envdef;
236
strcpy(*envdef, def);
220
237
}
221
238
return true;
222
239
}
224
241
return add_to_char_array(def, &(p->environ), &(p->envc));
225
242
}
226
243
244
#ifndef O_CLOEXEC
227
245
/*
228
246
* Based on the example in the GNU LibC manual chapter 13.13 "File
229
247
* Descriptor Flags".
230
248
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
231
249
*/
250
__attribute__((warn_unused_result))
232
251
static int set_cloexec_flag(int fd){
233
int ret = TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
252
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
234
253
/* If reading the flags failed, return error indication now. */
235
254
if(ret < 0){
236
255
return ret;
237
256
}
238
257
/* Store modified flag word in the descriptor. */
239
return TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD, ret | FD_CLOEXEC));
258
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
259
ret | FD_CLOEXEC));
240
260
}
261
#endif /* not O_CLOEXEC */
241
262
242
263
243
264
/* Mark processes as completed when they exit, and save their exit
257
278
/* No child processes */
258
279
break;
259
280
}
260
perror("waitpid");
281
error(0, errno, "waitpid");
261
282
}
262
283
263
284
/* A child exited, find it in process_list */
275
296
}
276
297
277
298
/* Prints out a password to stdout */
299
__attribute__((nonnull, warn_unused_result))
278
300
static bool print_out_password(const char *buffer, size_t length){
279
301
ssize_t ret;
280
302
for(size_t written = 0; written < length; written += (size_t)ret){
288
310
}
289
311
290
312
/* Removes and free a plugin from the plugin list */
313
__attribute__((nonnull))
291
314
static void free_plugin(plugin *plugin_node){
292
315
293
316
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
325
348
326
349
int main(int argc, char *argv[]){
327
350
char *plugindir = NULL;
351
char *pluginhelperdir = NULL;
328
352
char *argfile = NULL;
329
353
FILE *conffp;
330
size_t d_name_len;
331
DIR *dir = NULL;
332
struct dirent *dirst;
354
struct dirent **direntries = NULL;
333
355
struct stat st;
334
356
fd_set rfds_all;
335
357
int ret, maxfd = 0;
343
365
.sa_flags = SA_NOCLDSTOP };
344
366
char **custom_argv = NULL;
345
367
int custom_argc = 0;
368
int dir_fd = -1;
346
369
347
370
/* Establish a signal handler */
348
371
sigemptyset(&sigchld_action.sa_mask);
349
372
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
350
373
if(ret == -1){
351
perror("sigaddset");
352
exitstatus = EXIT_FAILURE;
374
error(0, errno, "sigaddset");
375
exitstatus = EX_OSERR;
353
376
goto fallback;
354
377
}
355
378
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
356
379
if(ret == -1){
357
perror("sigaction");
358
exitstatus = EXIT_FAILURE;
380
error(0, errno, "sigaction");
381
exitstatus = EX_OSERR;
359
382
goto fallback;
360
383
}
361
384
393
416
.doc = "Group ID the plugins will run as", .group = 3 },
394
417
{ .name = "debug", .key = 132,
395
418
.doc = "Debug mode", .group = 4 },
419
{ .name = "plugin-helper-dir", .key = 133,
420
.arg = "DIRECTORY",
421
.doc = "Specify a different plugin helper directory",
422
.group = 2 },
423
/*
424
* These reproduce what we would get without ARGP_NO_HELP
425
*/
426
{ .name = "help", .key = '?',
427
.doc = "Give this help list", .group = -1 },
428
{ .name = "usage", .key = -3,
429
.doc = "Give a short usage message", .group = -1 },
430
{ .name = "version", .key = 'V',
431
.doc = "Print program version", .group = -1 },
396
432
{ .name = NULL }
397
433
};
398
434
399
error_t parse_opt(int key, char *arg, __attribute__((unused))
400
struct argp_state *state){
435
__attribute__((nonnull(3)))
436
error_t parse_opt(int key, char *arg, struct argp_state *state){
437
errno = 0;
401
438
switch(key){
402
439
char *tmp;
403
intmax_t tmpmax;
440
intmax_t tmp_id;
404
441
case 'g': /* --global-options */
405
if(arg != NULL){
442
{
406
443
char *plugin_option;
407
444
while((plugin_option = strsep(&arg, ",")) != NULL){
408
if(plugin_option[0] == '\0'){
409
continue;
410
}
411
445
if(not add_argument(getplugin(NULL), plugin_option)){
412
perror("add_argument");
413
return ARGP_ERR_UNKNOWN;
446
break;
414
447
}
415
448
}
449
errno = 0;
416
450
}
417
451
break;
418
452
case 'G': /* --global-env */
419
if(arg == NULL){
420
break;
421
}
422
if(not add_environment(getplugin(NULL), arg, true)){
423
perror("add_environment");
453
if(add_environment(getplugin(NULL), arg, true)){
454
errno = 0;
424
455
}
425
456
break;
426
457
case 'o': /* --options-for */
427
if(arg != NULL){
428
char *plugin_name = strsep(&arg, ":");
429
if(plugin_name[0] == '\0'){
430
break;
431
}
432
char *plugin_option;
433
while((plugin_option = strsep(&arg, ",")) != NULL){
434
if(not add_argument(getplugin(plugin_name), plugin_option)){
435
perror("add_argument");
436
return ARGP_ERR_UNKNOWN;
458
{
459
char *option_list = strchr(arg, ':');
460
if(option_list == NULL){
461
argp_error(state, "No colon in \"%s\"", arg);
462
errno = EINVAL;
463
break;
464
}
465
*option_list = '\0';
466
option_list++;
467
if(arg[0] == '\0'){
468
argp_error(state, "Empty plugin name");
469
errno = EINVAL;
470
break;
471
}
472
char *option;
473
while((option = strsep(&option_list, ",")) != NULL){
474
if(not add_argument(getplugin(arg), option)){
475
break;
437
476
}
438
477
}
478
errno = 0;
439
479
}
440
480
break;
441
481
case 'E': /* --env-for */
442
if(arg == NULL){
443
break;
444
}
445
482
{
446
483
char *envdef = strchr(arg, ':');
447
484
if(envdef == NULL){
485
argp_error(state, "No colon in \"%s\"", arg);
486
errno = EINVAL;
448
487
break;
449
488
}
450
489
*envdef = '\0';
451
if(not add_environment(getplugin(arg), envdef+1, true)){
452
perror("add_environment");
490
envdef++;
491
if(arg[0] == '\0'){
492
argp_error(state, "Empty plugin name");
493
errno = EINVAL;
494
break;
495
}
496
if(add_environment(getplugin(arg), envdef, true)){
497
errno = 0;
453
498
}
454
499
}
455
500
break;
456
501
case 'd': /* --disable */
457
if(arg != NULL){
502
{
458
503
plugin *p = getplugin(arg);
459
if(p == NULL){
460
return ARGP_ERR_UNKNOWN;
504
if(p != NULL){
505
p->disabled = true;
506
errno = 0;
461
507
}
462
p->disabled = true;
463
508
}
464
509
break;
465
510
case 'e': /* --enable */
466
if(arg != NULL){
511
{
467
512
plugin *p = getplugin(arg);
468
if(p == NULL){
469
return ARGP_ERR_UNKNOWN;
513
if(p != NULL){
514
p->disabled = false;
515
errno = 0;
470
516
}
471
p->disabled = false;
472
517
}
473
518
break;
474
519
case 128: /* --plugin-dir */
475
520
free(plugindir);
476
521
plugindir = strdup(arg);
477
if(plugindir == NULL){
478
perror("strdup");
522
if(plugindir != NULL){
523
errno = 0;
479
524
}
480
525
break;
481
526
case 129: /* --config-file */
482
527
/* This is already done by parse_opt_config_file() */
483
528
break;
484
529
case 130: /* --userid */
485
errno = 0;
486
tmpmax = strtoimax(arg, &tmp, 10);
530
tmp_id = strtoimax(arg, &tmp, 10);
487
531
if(errno != 0 or tmp == arg or *tmp != '\0'
488
or tmpmax != (uid_t)tmpmax){
489
fprintf(stderr, "Bad user ID number: \"%s\", using %"
490
PRIdMAX "\n", arg, (intmax_t)uid);
491
} else {
492
uid = (uid_t)tmpmax;
532
or tmp_id != (uid_t)tmp_id){
533
argp_error(state, "Bad user ID number: \"%s\", using %"
534
PRIdMAX, arg, (intmax_t)uid);
535
break;
493
536
}
537
uid = (uid_t)tmp_id;
538
errno = 0;
494
539
break;
495
540
case 131: /* --groupid */
496
errno = 0;
497
tmpmax = strtoimax(arg, &tmp, 10);
541
tmp_id = strtoimax(arg, &tmp, 10);
498
542
if(errno != 0 or tmp == arg or *tmp != '\0'
499
or tmpmax != (gid_t)tmpmax){
500
fprintf(stderr, "Bad group ID number: \"%s\", using %"
501
PRIdMAX "\n", arg, (intmax_t)gid);
502
} else {
503
gid = (gid_t)tmpmax;
543
or tmp_id != (gid_t)tmp_id){
544
argp_error(state, "Bad group ID number: \"%s\", using %"
545
PRIdMAX, arg, (intmax_t)gid);
546
break;
504
547
}
548
gid = (gid_t)tmp_id;
549
errno = 0;
505
550
break;
506
551
case 132: /* --debug */
507
552
debug = true;
508
553
break;
554
case 133: /* --plugin-helper-dir */
555
free(pluginhelperdir);
556
pluginhelperdir = strdup(arg);
557
if(pluginhelperdir != NULL){
558
errno = 0;
559
}
560
break;
561
/*
562
* These reproduce what we would get without ARGP_NO_HELP
563
*/
564
case '?': /* --help */
565
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
566
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
567
case -3: /* --usage */
568
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
569
argp_state_help(state, state->out_stream,
570
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
571
case 'V': /* --version */
572
fprintf(state->out_stream, "%s\n", argp_program_version);
573
exit(EXIT_SUCCESS);
574
break;
509
575
/*
510
576
* When adding more options before this line, remember to also add a
511
577
* "case" to the "parse_opt_config_file" function below.
514
580
/* Cryptsetup always passes an argument, which is an empty
515
581
string if "none" was specified in /etc/crypttab. So if
516
582
argument was empty, we ignore it silently. */
517
if(arg[0] != '\0'){
518
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
583
if(arg[0] == '\0'){
584
break;
519
585
}
520
break;
521
case ARGP_KEY_END:
522
break;
523
586
default:
524
587
return ARGP_ERR_UNKNOWN;
525
588
}
526
return 0;
589
return errno; /* Set to 0 at start */
527
590
}
528
591
529
592
/* This option parser is the same as parse_opt() above, except it
531
594
error_t parse_opt_config_file(int key, char *arg,
532
595
__attribute__((unused))
533
596
struct argp_state *state){
597
errno = 0;
534
598
switch(key){
535
599
case 'g': /* --global-options */
536
600
case 'G': /* --global-env */
543
607
case 129: /* --config-file */
544
608
free(argfile);
545
609
argfile = strdup(arg);
546
if(argfile == NULL){
547
perror("strdup");
610
if(argfile != NULL){
611
errno = 0;
548
612
}
549
613
break;
550
614
case 130: /* --userid */
551
615
case 131: /* --groupid */
552
616
case 132: /* --debug */
617
case 133: /* --plugin-helper-dir */
618
case '?': /* --help */
619
case -3: /* --usage */
620
case 'V': /* --version */
553
621
case ARGP_KEY_ARG:
554
case ARGP_KEY_END:
555
622
break;
556
623
default:
557
624
return ARGP_ERR_UNKNOWN;
558
625
}
559
return 0;
626
return errno;
560
627
}
561
628
562
629
struct argp argp = { .options = options,
566
633
567
634
/* Parse using parse_opt_config_file() in order to get the custom
568
635
config file location, if any. */
569
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
570
if(ret == ARGP_ERR_UNKNOWN){
571
fprintf(stderr, "Unknown error while parsing arguments\n");
572
exitstatus = EXIT_FAILURE;
636
ret = argp_parse(&argp, argc, argv,
637
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
638
NULL, NULL);
639
switch(ret){
640
case 0:
641
break;
642
case ENOMEM:
643
default:
644
errno = ret;
645
error(0, errno, "argp_parse");
646
exitstatus = EX_OSERR;
647
goto fallback;
648
case EINVAL:
649
exitstatus = EX_USAGE;
573
650
goto fallback;
574
651
}
575
652
592
669
custom_argc = 1;
593
670
custom_argv = malloc(sizeof(char*) * 2);
594
671
if(custom_argv == NULL){
595
perror("malloc");
596
exitstatus = EXIT_FAILURE;
672
error(0, errno, "malloc");
673
exitstatus = EX_OSERR;
597
674
goto fallback;
598
675
}
599
676
custom_argv[0] = argv[0];
615
692
}
616
693
new_arg = strdup(p);
617
694
if(new_arg == NULL){
618
perror("strdup");
619
exitstatus = EXIT_FAILURE;
695
error(0, errno, "strdup");
696
exitstatus = EX_OSERR;
620
697
free(org_line);
621
698
goto fallback;
622
699
}
623
700
624
701
custom_argc += 1;
625
custom_argv = realloc(custom_argv, sizeof(char *)
626
* ((unsigned int) custom_argc + 1));
627
if(custom_argv == NULL){
628
perror("realloc");
629
exitstatus = EXIT_FAILURE;
630
free(org_line);
631
goto fallback;
702
{
703
char **new_argv = realloc(custom_argv, sizeof(char *)
704
* ((unsigned int)
705
custom_argc + 1));
706
if(new_argv == NULL){
707
error(0, errno, "realloc");
708
exitstatus = EX_OSERR;
709
free(new_arg);
710
free(org_line);
711
goto fallback;
712
} else {
713
custom_argv = new_argv;
714
}
632
715
}
633
716
custom_argv[custom_argc-1] = new_arg;
634
717
custom_argv[custom_argc] = NULL;
638
721
ret = fclose(conffp);
639
722
} while(ret == EOF and errno == EINTR);
640
723
if(ret == EOF){
641
perror("fclose");
642
exitstatus = EXIT_FAILURE;
724
error(0, errno, "fclose");
725
exitstatus = EX_IOERR;
643
726
goto fallback;
644
727
}
645
728
free(org_line);
647
730
/* Check for harmful errors and go to fallback. Other errors might
648
731
not affect opening plugins */
649
732
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
650
perror("fopen");
651
exitstatus = EXIT_FAILURE;
733
error(0, errno, "fopen");
734
exitstatus = EX_OSERR;
652
735
goto fallback;
653
736
}
654
737
}
655
/* If there was any arguments from configuration file,
656
pass them to parser as command arguments */
738
/* If there were any arguments from the configuration file, pass
739
them to parser as command line arguments */
657
740
if(custom_argv != NULL){
658
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
659
0, NULL);
660
if(ret == ARGP_ERR_UNKNOWN){
661
fprintf(stderr, "Unknown error while parsing arguments\n");
662
exitstatus = EXIT_FAILURE;
741
ret = argp_parse(&argp, custom_argc, custom_argv,
742
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
743
NULL, NULL);
744
switch(ret){
745
case 0:
746
break;
747
case ENOMEM:
748
default:
749
errno = ret;
750
error(0, errno, "argp_parse");
751
exitstatus = EX_OSERR;
752
goto fallback;
753
case EINVAL:
754
exitstatus = EX_CONFIG;
663
755
goto fallback;
664
756
}
665
757
}
666
758
667
759
/* Parse actual command line arguments, to let them override the
668
760
config file */
669
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
670
if(ret == ARGP_ERR_UNKNOWN){
671
fprintf(stderr, "Unknown error while parsing arguments\n");
672
exitstatus = EXIT_FAILURE;
673
goto fallback;
761
ret = argp_parse(&argp, argc, argv,
762
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
763
NULL, NULL);
764
switch(ret){
765
case 0:
766
break;
767
case ENOMEM:
768
default:
769
errno = ret;
770
error(0, errno, "argp_parse");
771
exitstatus = EX_OSERR;
772
goto fallback;
773
case EINVAL:
774
exitstatus = EX_USAGE;
775
goto fallback;
776
}
777
778
{
779
char *pluginhelperenv;
780
bool bret = true;
781
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
782
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
783
if(ret != -1){
784
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
785
}
786
if(ret == -1 or not bret){
787
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
788
" environment variable to \"%s\" for all plugins\n",
789
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
790
}
791
if(ret != -1){
792
free(pluginhelperenv);
793
}
674
794
}
675
795
676
796
if(debug){
687
807
}
688
808
}
689
809
690
/* Strip permissions down to nobody */
691
setgid(gid);
810
if(getuid() == 0){
811
/* Work around Debian bug #633582:
812
<http://bugs.debian.org/633582> */
813
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
814
if(plugindir_fd == -1){
815
if(errno != ENOENT){
816
error(0, errno, "open(\"" PDIR "\")");
817
}
818
} else {
819
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
820
if(ret == -1){
821
error(0, errno, "fstat");
822
} else {
823
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
824
ret = fchown(plugindir_fd, uid, gid);
825
if(ret == -1){
826
error(0, errno, "fchown");
827
}
828
}
829
}
830
TEMP_FAILURE_RETRY(close(plugindir_fd));
831
}
832
}
833
834
/* Lower permissions */
835
ret = setgid(gid);
692
836
if(ret == -1){
693
perror("setgid");
837
error(0, errno, "setgid");
694
838
}
695
839
ret = setuid(uid);
696
840
if(ret == -1){
697
perror("setuid");
698
}
699
700
if(plugindir == NULL){
701
dir = opendir(PDIR);
702
} else {
703
dir = opendir(plugindir);
704
}
705
706
if(dir == NULL){
707
perror("Could not open plugin dir");
708
exitstatus = EXIT_FAILURE;
709
goto fallback;
710
}
711
712
/* Set the FD_CLOEXEC flag on the directory, if possible */
841
error(0, errno, "setuid");
842
}
843
844
/* Open plugin directory with close_on_exec flag */
713
845
{
714
int dir_fd = dirfd(dir);
715
if(dir_fd >= 0){
716
ret = set_cloexec_flag(dir_fd);
717
if(ret < 0){
718
perror("set_cloexec_flag");
719
exitstatus = EXIT_FAILURE;
720
goto fallback;
846
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
847
#ifdef O_CLOEXEC
848
O_CLOEXEC
849
#else /* not O_CLOEXEC */
850
0
851
#endif /* not O_CLOEXEC */
852
);
853
if(dir_fd == -1){
854
error(0, errno, "Could not open plugin dir");
855
exitstatus = EX_UNAVAILABLE;
856
goto fallback;
857
}
858
859
#ifndef O_CLOEXEC
860
/* Set the FD_CLOEXEC flag on the directory */
861
ret = set_cloexec_flag(dir_fd);
862
if(ret < 0){
863
error(0, errno, "set_cloexec_flag");
864
exitstatus = EX_OSERR;
865
goto fallback;
866
}
867
#endif /* O_CLOEXEC */
868
}
869
870
int good_name(const struct dirent * const dirent){
871
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
872
"*.dpkg-old", "*.dpkg-bak",
873
"*.dpkg-divert", NULL };
874
#ifdef __GNUC__
875
#pragma GCC diagnostic push
876
#pragma GCC diagnostic ignored "-Wcast-qual"
877
#endif
878
for(const char **pat = (const char **)patterns;
879
*pat != NULL; pat++){
880
#ifdef __GNUC__
881
#pragma GCC diagnostic pop
882
#endif
883
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
884
!= FNM_NOMATCH){
885
if(debug){
886
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
887
" matching pattern %s\n", dirent->d_name, *pat);
888
}
889
return 0;
721
890
}
722
891
}
892
return 1;
893
}
894
895
#ifdef __GLIBC__
896
#if __GLIBC_PREREQ(2, 15)
897
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
898
alphasort);
899
#else /* not __GLIBC_PREREQ(2, 15) */
900
int numplugins = scandir(plugindir != NULL ? plugindir : PDIR,
901
&direntries, good_name, alphasort);
902
#endif /* not __GLIBC_PREREQ(2, 15) */
903
#else /* not __GLIBC__ */
904
int numplugins = scandir(plugindir != NULL ? plugindir : PDIR,
905
&direntries, good_name, alphasort);
906
#endif /* not __GLIBC__ */
907
if(numplugins == -1){
908
error(0, errno, "Could not scan plugin dir");
909
direntries = NULL;
910
exitstatus = EX_OSERR;
911
goto fallback;
723
912
}
724
913
725
914
FD_ZERO(&rfds_all);
726
915
727
916
/* Read and execute any executable in the plugin directory*/
728
while(true){
729
do {
730
dirst = readdir(dir);
731
} while(dirst == NULL and errno == EINTR);
732
733
/* All directory entries have been processed */
734
if(dirst == NULL){
735
if(errno == EBADF){
736
perror("readdir");
737
exitstatus = EXIT_FAILURE;
738
goto fallback;
739
}
740
break;
741
}
742
743
d_name_len = strlen(dirst->d_name);
744
745
/* Ignore dotfiles, backup files and other junk */
746
{
747
bool bad_name = false;
748
749
const char const *bad_prefixes[] = { ".", "#", NULL };
750
751
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
752
".dpkg-old",
753
".dpkg-bak",
754
".dpkg-divert", NULL };
755
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
756
size_t pre_len = strlen(*pre);
757
if((d_name_len >= pre_len)
758
and strncmp((dirst->d_name), *pre, pre_len) == 0){
759
if(debug){
760
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
761
" with bad prefix %s\n", dirst->d_name, *pre);
762
}
763
bad_name = true;
764
break;
765
}
766
}
767
if(bad_name){
768
continue;
769
}
770
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
771
size_t suf_len = strlen(*suf);
772
if((d_name_len >= suf_len)
773
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
774
== 0)){
775
if(debug){
776
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
777
" with bad suffix %s\n", dirst->d_name, *suf);
778
}
779
bad_name = true;
780
break;
781
}
782
}
783
784
if(bad_name){
785
continue;
786
}
787
}
788
789
char *filename;
790
if(plugindir == NULL){
791
ret = TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
792
dirst->d_name));
793
} else {
794
ret = TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s", plugindir,
795
dirst->d_name));
796
}
797
if(ret < 0){
798
perror("asprintf");
917
for(int i = 0; i < numplugins; i++){
918
919
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
920
if(plugin_fd == -1){
921
error(0, errno, "Could not open plugin");
922
free(direntries[i]);
799
923
continue;
800
924
}
801
802
ret = TEMP_FAILURE_RETRY(stat(filename, &st));
925
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
803
926
if(ret == -1){
804
perror("stat");
805
free(filename);
927
error(0, errno, "stat");
928
TEMP_FAILURE_RETRY(close(plugin_fd));
929
free(direntries[i]);
806
930
continue;
807
931
}
808
932
809
933
/* Ignore non-executable files */
810
934
if(not S_ISREG(st.st_mode)
811
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
935
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
936
X_OK, 0)) != 0)){
812
937
if(debug){
813
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
814
" with bad type or mode\n", filename);
938
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
939
" with bad type or mode\n",
940
plugindir != NULL ? plugindir : PDIR,
941
direntries[i]->d_name);
815
942
}
816
free(filename);
943
TEMP_FAILURE_RETRY(close(plugin_fd));
944
free(direntries[i]);
817
945
continue;
818
946
}
819
947
820
plugin *p = getplugin(dirst->d_name);
948
plugin *p = getplugin(direntries[i]->d_name);
821
949
if(p == NULL){
822
perror("getplugin");
823
free(filename);
950
error(0, errno, "getplugin");
951
TEMP_FAILURE_RETRY(close(plugin_fd));
952
free(direntries[i]);
824
953
continue;
825
954
}
826
955
if(p->disabled){
827
956
if(debug){
828
957
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
829
dirst->d_name);
958
direntries[i]->d_name);
830
959
}
831
free(filename);
960
TEMP_FAILURE_RETRY(close(plugin_fd));
961
free(direntries[i]);
832
962
continue;
833
963
}
834
964
{
837
967
if(g != NULL){
838
968
for(char **a = g->argv + 1; *a != NULL; a++){
839
969
if(not add_argument(p, *a)){
840
perror("add_argument");
970
error(0, errno, "add_argument");
841
971
}
842
972
}
843
973
/* Add global environment variables */
844
974
for(char **e = g->environ; *e != NULL; e++){
845
975
if(not add_environment(p, *e, false)){
846
perror("add_environment");
976
error(0, errno, "add_environment");
847
977
}
848
978
}
849
979
}
850
980
}
851
/* If this plugin has any environment variables, we will call
852
using execve and need to duplicate the environment from this
853
process, too. */
981
/* If this plugin has any environment variables, we need to
982
duplicate the environment from this process, too. */
854
983
if(p->environ[0] != NULL){
855
984
for(char **e = environ; *e != NULL; e++){
856
985
if(not add_environment(p, *e, false)){
857
perror("add_environment");
986
error(0, errno, "add_environment");
858
987
}
859
988
}
860
989
}
861
990
862
991
int pipefd[2];
863
ret = TEMP_FAILURE_RETRY(pipe(pipefd));
992
#ifndef O_CLOEXEC
993
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
994
#else /* O_CLOEXEC */
995
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
996
#endif /* O_CLOEXEC */
864
997
if(ret == -1){
865
perror("pipe");
866
exitstatus = EXIT_FAILURE;
867
goto fallback;
868
}
998
error(0, errno, "pipe");
999
exitstatus = EX_OSERR;
1000
free(direntries[i]);
1001
goto fallback;
1002
}
1003
if(pipefd[0] >= FD_SETSIZE){
1004
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
1005
FD_SETSIZE);
1006
TEMP_FAILURE_RETRY(close(pipefd[0]));
1007
TEMP_FAILURE_RETRY(close(pipefd[1]));
1008
exitstatus = EX_OSERR;
1009
free(direntries[i]);
1010
goto fallback;
1011
}
1012
#ifndef O_CLOEXEC
869
1013
/* Ask OS to automatic close the pipe on exec */
870
1014
ret = set_cloexec_flag(pipefd[0]);
871
1015
if(ret < 0){
872
perror("set_cloexec_flag");
873
exitstatus = EXIT_FAILURE;
1016
error(0, errno, "set_cloexec_flag");
1017
TEMP_FAILURE_RETRY(close(pipefd[0]));
1018
TEMP_FAILURE_RETRY(close(pipefd[1]));
1019
exitstatus = EX_OSERR;
1020
free(direntries[i]);
874
1021
goto fallback;
875
1022
}
876
1023
ret = set_cloexec_flag(pipefd[1]);
877
1024
if(ret < 0){
878
perror("set_cloexec_flag");
879
exitstatus = EXIT_FAILURE;
1025
error(0, errno, "set_cloexec_flag");
1026
TEMP_FAILURE_RETRY(close(pipefd[0]));
1027
TEMP_FAILURE_RETRY(close(pipefd[1]));
1028
exitstatus = EX_OSERR;
1029
free(direntries[i]);
880
1030
goto fallback;
881
1031
}
1032
#endif /* not O_CLOEXEC */
882
1033
/* Block SIGCHLD until process is safely in process list */
883
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
884
&sigchld_action.sa_mask,
885
NULL));
1034
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1035
&sigchld_action.sa_mask,
1036
NULL));
886
1037
if(ret < 0){
887
perror("sigprocmask");
888
exitstatus = EXIT_FAILURE;
1038
error(0, errno, "sigprocmask");
1039
exitstatus = EX_OSERR;
1040
free(direntries[i]);
889
1041
goto fallback;
890
1042
}
891
1043
/* Starting a new process to be watched */
894
1046
pid = fork();
895
1047
} while(pid == -1 and errno == EINTR);
896
1048
if(pid == -1){
897
perror("fork");
898
exitstatus = EXIT_FAILURE;
1049
error(0, errno, "fork");
1050
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1051
&sigchld_action.sa_mask, NULL));
1052
TEMP_FAILURE_RETRY(close(pipefd[0]));
1053
TEMP_FAILURE_RETRY(close(pipefd[1]));
1054
exitstatus = EX_OSERR;
1055
free(direntries[i]);
899
1056
goto fallback;
900
1057
}
901
1058
if(pid == 0){
902
1059
/* this is the child process */
903
1060
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
904
1061
if(ret < 0){
905
perror("sigaction");
906
_exit(EXIT_FAILURE);
1062
error(0, errno, "sigaction");
1063
_exit(EX_OSERR);
907
1064
}
908
1065
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
909
1066
if(ret < 0){
910
perror("sigprocmask");
911
_exit(EXIT_FAILURE);
1067
error(0, errno, "sigprocmask");
1068
_exit(EX_OSERR);
912
1069
}
913
1070
914
1071
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
915
1072
if(ret == -1){
916
perror("dup2");
917
_exit(EXIT_FAILURE);
1073
error(0, errno, "dup2");
1074
_exit(EX_OSERR);
918
1075
}
919
1076
920
if(dirfd(dir) < 0){
921
/* If dir has no file descriptor, we could not set FD_CLOEXEC
922
above and must now close it manually here. */
923
closedir(dir);
924
}
925
if(p->environ[0] == NULL){
926
if(execv(filename, p->argv) < 0){
927
perror("execv");
928
_exit(EXIT_FAILURE);
929
}
930
} else {
931
if(execve(filename, p->argv, p->environ) < 0){
932
perror("execve");
933
_exit(EXIT_FAILURE);
934
}
1077
if(fexecve(plugin_fd, p->argv,
1078
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1079
error(0, errno, "fexecve for %s/%s",
1080
plugindir != NULL ? plugindir : PDIR,
1081
direntries[i]->d_name);
1082
_exit(EX_OSERR);
935
1083
}
936
1084
/* no return */
937
1085
}
938
1086
/* Parent process */
939
1087
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
940
1088
pipe */
941
free(filename);
942
plugin *new_plugin = getplugin(dirst->d_name);
1089
TEMP_FAILURE_RETRY(close(plugin_fd));
1090
plugin *new_plugin = getplugin(direntries[i]->d_name);
943
1091
if(new_plugin == NULL){
944
perror("getplugin");
945
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
946
&sigchld_action.sa_mask,
947
NULL));
1092
error(0, errno, "getplugin");
1093
ret = (int)(TEMP_FAILURE_RETRY
1094
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1095
NULL)));
948
1096
if(ret < 0){
949
perror("sigprocmask");
1097
error(0, errno, "sigprocmask");
950
1098
}
951
exitstatus = EXIT_FAILURE;
1099
exitstatus = EX_OSERR;
1100
free(direntries[i]);
952
1101
goto fallback;
953
1102
}
1103
free(direntries[i]);
954
1104
955
1105
new_plugin->pid = pid;
956
1106
new_plugin->fd = pipefd[0];
957
1107
958
1108
/* Unblock SIGCHLD so signal handler can be run if this process
959
1109
has already completed */
960
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
961
&sigchld_action.sa_mask,
962
NULL));
1110
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1111
&sigchld_action.sa_mask,
1112
NULL));
963
1113
if(ret < 0){
964
perror("sigprocmask");
965
exitstatus = EXIT_FAILURE;
1114
error(0, errno, "sigprocmask");
1115
exitstatus = EX_OSERR;
966
1116
goto fallback;
967
1117
}
968
1118
969
FD_SET(new_plugin->fd, &rfds_all);
1119
#if defined (__GNUC__) and defined (__GLIBC__)
1120
#if not __GLIBC_PREREQ(2, 16)
1121
#pragma GCC diagnostic push
1122
#pragma GCC diagnostic ignored "-Wsign-conversion"
1123
#endif
1124
#endif
1125
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1126
-Wconversion in GNU libc
1127
before 2.16 */
1128
#if defined (__GNUC__) and defined (__GLIBC__)
1129
#if not __GLIBC_PREREQ(2, 16)
1130
#pragma GCC diagnostic pop
1131
#endif
1132
#endif
970
1133
971
1134
if(maxfd < new_plugin->fd){
972
1135
maxfd = new_plugin->fd;
973
1136
}
974
1137
}
975
1138
976
TEMP_FAILURE_RETRY(closedir(dir));
977
dir = NULL;
1139
free(direntries);
1140
direntries = NULL;
1141
TEMP_FAILURE_RETRY(close(dir_fd));
1142
dir_fd = -1;
978
1143
free_plugin(getplugin(NULL));
979
1144
980
1145
for(plugin *p = plugin_list; p != NULL; p = p->next){
993
1158
fd_set rfds = rfds_all;
994
1159
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
995
1160
if(select_ret == -1 and errno != EINTR){
996
perror("select");
997
exitstatus = EXIT_FAILURE;
1161
error(0, errno, "select");
1162
exitstatus = EX_OSERR;
998
1163
goto fallback;
999
1164
}
1000
1165
/* OK, now either a process completed, or something can be read
1026
1191
}
1027
1192
1028
1193
/* Remove the plugin */
1029
FD_CLR(proc->fd, &rfds_all);
1194
#if defined (__GNUC__) and defined (__GLIBC__)
1195
#if not __GLIBC_PREREQ(2, 16)
1196
#pragma GCC diagnostic push
1197
#pragma GCC diagnostic ignored "-Wsign-conversion"
1198
#endif
1199
#endif
1200
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1201
-Wconversion in GNU libc
1202
before 2.16 */
1203
#if defined (__GNUC__) and defined (__GLIBC__)
1204
#if not __GLIBC_PREREQ(2, 16)
1205
#pragma GCC diagnostic pop
1206
#endif
1207
#endif
1030
1208
1031
1209
/* Block signal while modifying process_list */
1032
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1033
&sigchld_action.sa_mask,
1034
NULL));
1210
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1211
(SIG_BLOCK,
1212
&sigchld_action.sa_mask,
1213
NULL));
1035
1214
if(ret < 0){
1036
perror("sigprocmask");
1037
exitstatus = EXIT_FAILURE;
1215
error(0, errno, "sigprocmask");
1216
exitstatus = EX_OSERR;
1038
1217
goto fallback;
1039
1218
}
1040
1219
1043
1222
proc = next_plugin;
1044
1223
1045
1224
/* We are done modifying process list, so unblock signal */
1046
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1047
&sigchld_action.sa_mask,
1048
NULL));
1225
ret = (int)(TEMP_FAILURE_RETRY
1226
(sigprocmask(SIG_UNBLOCK,
1227
&sigchld_action.sa_mask, NULL)));
1049
1228
if(ret < 0){
1050
perror("sigprocmask");
1051
exitstatus = EXIT_FAILURE;
1229
error(0, errno, "sigprocmask");
1230
exitstatus = EX_OSERR;
1052
1231
goto fallback;
1053
1232
}
1054
1233
1064
1243
bool bret = print_out_password(proc->buffer,
1065
1244
proc->buffer_length);
1066
1245
if(not bret){
1067
perror("print_out_password");
1068
exitstatus = EXIT_FAILURE;
1246
error(0, errno, "print_out_password");
1247
exitstatus = EX_IOERR;
1069
1248
}
1070
1249
goto fallback;
1071
1250
}
1072
1251
1073
1252
/* This process has not completed. Does it have any output? */
1074
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1253
#if defined (__GNUC__) and defined (__GLIBC__)
1254
#if not __GLIBC_PREREQ(2, 16)
1255
#pragma GCC diagnostic push
1256
#pragma GCC diagnostic ignored "-Wsign-conversion"
1257
#endif
1258
#endif
1259
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1260
warning from
1261
-Wconversion
1262
in GNU libc
1263
before
1264
2.16 */
1265
#if defined (__GNUC__) and defined (__GLIBC__)
1266
#if not __GLIBC_PREREQ(2, 16)
1267
#pragma GCC diagnostic pop
1268
#endif
1269
#endif
1075
1270
/* This process had nothing to say at this time */
1076
1271
proc = proc->next;
1077
1272
continue;
1078
1273
}
1079
1274
/* Before reading, make the process' data buffer large enough */
1080
1275
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1081
proc->buffer = realloc(proc->buffer, proc->buffer_size
1082
+ (size_t) BUFFER_SIZE);
1083
if(proc->buffer == NULL){
1084
perror("malloc");
1085
exitstatus = EXIT_FAILURE;
1276
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1277
+ (size_t) BUFFER_SIZE);
1278
if(new_buffer == NULL){
1279
error(0, errno, "malloc");
1280
exitstatus = EX_OSERR;
1086
1281
goto fallback;
1087
1282
}
1283
proc->buffer = new_buffer;
1088
1284
proc->buffer_size += BUFFER_SIZE;
1089
1285
}
1090
1286
/* Read from the process */
1109
1305
1110
1306
fallback:
1111
1307
1112
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1308
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1309
and exitstatus != EX_OK)){
1113
1310
/* Fallback if all plugins failed, none are found or an error
1114
1311
occured */
1115
1312
bool bret;
1123
1320
}
1124
1321
bret = print_out_password(passwordbuffer, len);
1125
1322
if(not bret){
1126
perror("print_out_password");
1127
exitstatus = EXIT_FAILURE;
1323
error(0, errno, "print_out_password");
1324
exitstatus = EX_IOERR;
1128
1325
}
1129
1326
}
1130
1327
1131
1328
/* Restore old signal handler */
1132
1329
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1133
1330
if(ret == -1){
1134
perror("sigaction");
1135
exitstatus = EXIT_FAILURE;
1331
error(0, errno, "sigaction");
1332
exitstatus = EX_OSERR;
1136
1333
}
1137
1334
1138
1335
if(custom_argv != NULL){
1142
1339
free(custom_argv);
1143
1340
}
1144
1341
1145
if(dir != NULL){
1146
closedir(dir);
1342
free(direntries);
1343
1344
if(dir_fd != -1){
1345
TEMP_FAILURE_RETRY(close(dir_fd));
1147
1346
}
1148
1347
1149
1348
/* Kill the processes */
1153
1352
ret = kill(p->pid, SIGTERM);
1154
1353
if(ret == -1 and errno != ESRCH){
1155
1354
/* Set-uid proccesses might not get closed */
1156
perror("kill");
1355
error(0, errno, "kill");
1157
1356
}
1158
1357
}
1159
1358
}
1163
1362
ret = wait(NULL);
1164
1363
} while(ret >= 0);
1165
1364
if(errno != ECHILD){
1166
perror("wait");
1365
error(0, errno, "wait");
1167
1366
}
1168
1367
1169
1368
free_plugin_list();
1170
1369
1171
1370
free(plugindir);
1371
free(pluginhelperdir);
1172
1372
free(argfile);
1173
1373
1174
1374
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0