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- Committer: Teddy Hogeborn
- Date: 2016-02-28 16:18:14 UTC
- mfrom: (237.4.63 release)
- Revision ID: teddy@recompile.se-20160228161814-tu6d4uw6oruqc5eo
Merge from release branch.
- 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 © 2008-2016 Teddy Hogeborn
6
* Copyright © 2008-2016 Björn Påhlsson
7
7
*
8
8
* This program is free software: you can redistribute it and/or
9
9
* modify it under the terms of the GNU General Public License as
19
19
* along with this program. If not, see
20
20
* <http://www.gnu.org/licenses/>.
21
21
*
22
* Contact the authors at <mandos@fukt.bsnet.se>.
22
* Contact the authors at <mandos@recompile.se>.
23
23
*/
24
24
25
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
asprintf() */
26
O_CLOEXEC, pipe2() */
27
27
#include <stddef.h> /* size_t, NULL */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
EXIT_SUCCESS, realloc() */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
29
realloc() */
30
30
#include <stdbool.h> /* bool, true, false */
31
#include <stdio.h> /* perror, fileno(), fprintf(),
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, opendir(), stat(), struct
34
stat, waitpid(), WIFEXITED(),
35
WEXITSTATUS(), wait(), pid_t,
36
uid_t, gid_t, getuid(), getgid(),
37
dirfd() */
31
#include <stdio.h> /* fileno(), fprintf(),
32
stderr, STDOUT_FILENO, fclose() */
33
#include <sys/types.h> /* fstat(), struct stat, waitpid(),
34
WIFEXITED(), WEXITSTATUS(), wait(),
35
pid_t, uid_t, gid_t, getuid(),
36
getgid() */
38
37
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
39
38
FD_SET(), FD_ISSET(), FD_CLR */
40
39
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
40
WEXITSTATUS(), WTERMSIG(),
42
41
WCOREDUMP() */
43
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
42
#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
44
43
#include <iso646.h> /* and, or, not */
45
#include <dirent.h> /* DIR, struct dirent, opendir(),
46
readdir(), closedir(), dirfd() */
47
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
48
fcntl(), setuid(), setgid(),
49
F_GETFD, F_SETFD, FD_CLOEXEC,
50
access(), pipe(), fork(), close()
51
dup2(), STDOUT_FILENO, _exit(),
52
execv(), write(), read(),
53
close() */
44
#include <dirent.h> /* struct dirent, scandirat() */
45
#include <unistd.h> /* fcntl(), F_GETFD, F_SETFD,
46
FD_CLOEXEC, write(), STDOUT_FILENO,
47
struct stat, fstat(), close(),
48
setgid(), setuid(), S_ISREG(),
49
faccessat() pipe2(), fork(),
50
_exit(), dup2(), fexecve(), read()
51
*/
54
52
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
55
FD_CLOEXEC */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal() */
53
FD_CLOEXEC, openat(), scandirat(),
54
pipe2() */
55
#include <string.h> /* strsep, strlen(), strsignal(),
56
strcmp(), strncmp() */
58
57
#include <errno.h> /* errno */
59
58
#include <argp.h> /* struct argp_option, struct
60
59
argp_state, struct argp,
68
67
*/
69
68
#include <errno.h> /* errno, EBADF */
70
69
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
70
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,
71
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
72
#include <errno.h> /* errno */
73
#include <error.h> /* error() */
74
#include <fnmatch.h> /* fnmatch() */
71
75
72
76
#define BUFFER_SIZE 256
73
77
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))){
110
116
}
111
117
}
112
118
/* Create a new plugin */
113
plugin *new_plugin = malloc(sizeof(plugin));
119
plugin *new_plugin = NULL;
120
do {
121
new_plugin = malloc(sizeof(plugin));
122
} while(new_plugin == NULL and errno == EINTR);
114
123
if(new_plugin == NULL){
115
124
return NULL;
116
125
}
117
126
char *copy_name = NULL;
118
127
if(name != NULL){
119
copy_name = strdup(name);
128
do {
129
copy_name = strdup(name);
130
} while(copy_name == NULL and errno == EINTR);
120
131
if(copy_name == NULL){
132
int e = errno;
121
133
free(new_plugin);
134
errno = e;
122
135
return NULL;
123
136
}
124
137
}
128
141
.disabled = false,
129
142
.next = plugin_list };
130
143
131
new_plugin->argv = malloc(sizeof(char *) * 2);
144
do {
145
new_plugin->argv = malloc(sizeof(char *) * 2);
146
} while(new_plugin->argv == NULL and errno == EINTR);
132
147
if(new_plugin->argv == NULL){
148
int e = errno;
133
149
free(copy_name);
134
150
free(new_plugin);
151
errno = e;
135
152
return NULL;
136
153
}
137
154
new_plugin->argv[0] = copy_name;
138
155
new_plugin->argv[1] = NULL;
139
156
140
new_plugin->environ = malloc(sizeof(char *));
157
do {
158
new_plugin->environ = malloc(sizeof(char *));
159
} while(new_plugin->environ == NULL and errno == EINTR);
141
160
if(new_plugin->environ == NULL){
161
int e = errno;
142
162
free(copy_name);
143
163
free(new_plugin->argv);
144
164
free(new_plugin);
165
errno = e;
145
166
return NULL;
146
167
}
147
168
new_plugin->environ[0] = NULL;
152
173
}
153
174
154
175
/* Helper function for add_argument and add_environment */
176
__attribute__((nonnull, warn_unused_result))
155
177
static bool add_to_char_array(const char *new, char ***array,
156
178
int *len){
157
179
/* Resize the pointed-to array to hold one more pointer */
158
*array = realloc(*array, sizeof(char *)
159
* (size_t) ((*len) + 2));
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);
160
185
/* Malloc check */
161
if(*array == NULL){
186
if(new_array == NULL){
162
187
return false;
163
188
}
189
*array = new_array;
164
190
/* Make a copy of the new string */
165
char *copy = strdup(new);
191
char *copy;
192
do {
193
copy = strdup(new);
194
} while(copy == NULL and errno == EINTR);
166
195
if(copy == NULL){
167
196
return false;
168
197
}
175
204
}
176
205
177
206
/* Add to a plugin's argument vector */
207
__attribute__((nonnull(2), warn_unused_result))
178
208
static bool add_argument(plugin *p, const char *arg){
179
209
if(p == NULL){
180
210
return false;
183
213
}
184
214
185
215
/* Add to a plugin's environment */
216
__attribute__((nonnull(2), warn_unused_result))
186
217
static bool add_environment(plugin *p, const char *def, bool replace){
187
218
if(p == NULL){
188
219
return false;
190
221
/* namelen = length of name of environment variable */
191
222
size_t namelen = (size_t)(strchrnul(def, '=') - def);
192
223
/* Search for this environment variable */
193
for(char **e = p->environ; *e != NULL; e++){
194
if(strncmp(*e, def, namelen + 1) == 0){
224
for(char **envdef = p->environ; *envdef != NULL; envdef++){
225
if(strncmp(*envdef, def, namelen + 1) == 0){
195
226
/* It already exists */
196
227
if(replace){
197
char *new = realloc(*e, strlen(def) + 1);
198
if(new == NULL){
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){
199
233
return false;
200
234
}
201
*e = new;
202
strcpy(*e, def);
235
*envdef = new_envdef;
236
strcpy(*envdef, def);
203
237
}
204
238
return true;
205
239
}
207
241
return add_to_char_array(def, &(p->environ), &(p->envc));
208
242
}
209
243
244
#ifndef O_CLOEXEC
210
245
/*
211
246
* Based on the example in the GNU LibC manual chapter 13.13 "File
212
247
* Descriptor Flags".
213
248
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
214
249
*/
250
__attribute__((warn_unused_result))
215
251
static int set_cloexec_flag(int fd){
216
int ret = fcntl(fd, F_GETFD, 0);
252
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
217
253
/* If reading the flags failed, return error indication now. */
218
254
if(ret < 0){
219
255
return ret;
220
256
}
221
257
/* Store modified flag word in the descriptor. */
222
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
258
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
259
ret | FD_CLOEXEC));
223
260
}
261
#endif /* not O_CLOEXEC */
224
262
225
263
226
264
/* Mark processes as completed when they exit, and save their exit
240
278
/* No child processes */
241
279
break;
242
280
}
243
perror("waitpid");
281
error(0, errno, "waitpid");
244
282
}
245
283
246
284
/* A child exited, find it in process_list */
258
296
}
259
297
260
298
/* Prints out a password to stdout */
299
__attribute__((nonnull, warn_unused_result))
261
300
static bool print_out_password(const char *buffer, size_t length){
262
301
ssize_t ret;
263
302
for(size_t written = 0; written < length; written += (size_t)ret){
271
310
}
272
311
273
312
/* Removes and free a plugin from the plugin list */
313
__attribute__((nonnull))
274
314
static void free_plugin(plugin *plugin_node){
275
315
276
316
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
308
348
309
349
int main(int argc, char *argv[]){
310
350
char *plugindir = NULL;
351
char *pluginhelperdir = NULL;
311
352
char *argfile = NULL;
312
353
FILE *conffp;
313
size_t d_name_len;
314
DIR *dir = NULL;
315
struct dirent *dirst;
354
struct dirent **direntries = NULL;
316
355
struct stat st;
317
356
fd_set rfds_all;
318
357
int ret, maxfd = 0;
319
358
ssize_t sret;
320
intmax_t tmpmax;
321
359
uid_t uid = 65534;
322
360
gid_t gid = 65534;
323
361
bool debug = false;
327
365
.sa_flags = SA_NOCLDSTOP };
328
366
char **custom_argv = NULL;
329
367
int custom_argc = 0;
368
int dir_fd = -1;
330
369
331
370
/* Establish a signal handler */
332
371
sigemptyset(&sigchld_action.sa_mask);
333
372
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
334
373
if(ret == -1){
335
perror("sigaddset");
336
exitstatus = EXIT_FAILURE;
374
error(0, errno, "sigaddset");
375
exitstatus = EX_OSERR;
337
376
goto fallback;
338
377
}
339
378
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
340
379
if(ret == -1){
341
perror("sigaction");
342
exitstatus = EXIT_FAILURE;
380
error(0, errno, "sigaction");
381
exitstatus = EX_OSERR;
343
382
goto fallback;
344
383
}
345
384
377
416
.doc = "Group ID the plugins will run as", .group = 3 },
378
417
{ .name = "debug", .key = 132,
379
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 },
380
432
{ .name = NULL }
381
433
};
382
434
383
error_t parse_opt(int key, char *arg, __attribute__((unused))
384
struct argp_state *state){
385
char *tmp;
435
__attribute__((nonnull(3)))
436
error_t parse_opt(int key, char *arg, struct argp_state *state){
437
errno = 0;
386
438
switch(key){
439
char *tmp;
440
intmax_t tmp_id;
387
441
case 'g': /* --global-options */
388
if(arg != NULL){
442
{
389
443
char *plugin_option;
390
444
while((plugin_option = strsep(&arg, ",")) != NULL){
391
if(plugin_option[0] == '\0'){
392
continue;
393
}
394
445
if(not add_argument(getplugin(NULL), plugin_option)){
395
perror("add_argument");
396
return ARGP_ERR_UNKNOWN;
446
break;
397
447
}
398
448
}
449
errno = 0;
399
450
}
400
451
break;
401
452
case 'G': /* --global-env */
402
if(arg == NULL){
403
break;
404
}
405
if(not add_environment(getplugin(NULL), arg, true)){
406
perror("add_environment");
453
if(add_environment(getplugin(NULL), arg, true)){
454
errno = 0;
407
455
}
408
456
break;
409
457
case 'o': /* --options-for */
410
if(arg != NULL){
411
char *plugin_name = strsep(&arg, ":");
412
if(plugin_name[0] == '\0'){
413
break;
414
}
415
char *plugin_option;
416
while((plugin_option = strsep(&arg, ",")) != NULL){
417
if(not add_argument(getplugin(plugin_name), plugin_option)){
418
perror("add_argument");
419
return ARGP_ERR_UNKNOWN;
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;
420
476
}
421
477
}
478
errno = 0;
422
479
}
423
480
break;
424
481
case 'E': /* --env-for */
425
if(arg == NULL){
426
break;
427
}
428
482
{
429
483
char *envdef = strchr(arg, ':');
430
484
if(envdef == NULL){
485
argp_error(state, "No colon in \"%s\"", arg);
486
errno = EINVAL;
431
487
break;
432
488
}
433
489
*envdef = '\0';
434
if(not add_environment(getplugin(arg), envdef+1, true)){
435
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;
436
498
}
437
499
}
438
500
break;
439
501
case 'd': /* --disable */
440
if(arg != NULL){
502
{
441
503
plugin *p = getplugin(arg);
442
if(p == NULL){
443
return ARGP_ERR_UNKNOWN;
504
if(p != NULL){
505
p->disabled = true;
506
errno = 0;
444
507
}
445
p->disabled = true;
446
508
}
447
509
break;
448
510
case 'e': /* --enable */
449
if(arg != NULL){
511
{
450
512
plugin *p = getplugin(arg);
451
if(p == NULL){
452
return ARGP_ERR_UNKNOWN;
513
if(p != NULL){
514
p->disabled = false;
515
errno = 0;
453
516
}
454
p->disabled = false;
455
517
}
456
518
break;
457
519
case 128: /* --plugin-dir */
458
520
free(plugindir);
459
521
plugindir = strdup(arg);
460
if(plugindir == NULL){
461
perror("strdup");
522
if(plugindir != NULL){
523
errno = 0;
462
524
}
463
525
break;
464
526
case 129: /* --config-file */
465
527
/* This is already done by parse_opt_config_file() */
466
528
break;
467
529
case 130: /* --userid */
468
errno = 0;
469
tmpmax = strtoimax(arg, &tmp, 10);
530
tmp_id = strtoimax(arg, &tmp, 10);
470
531
if(errno != 0 or tmp == arg or *tmp != '\0'
471
or tmpmax != (uid_t)tmpmax){
472
fprintf(stderr, "Bad user ID number: \"%s\", using %"
473
PRIdMAX "\n", arg, (intmax_t)uid);
474
} else {
475
uid = (uid_t)tmpmax;
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;
476
536
}
537
uid = (uid_t)tmp_id;
538
errno = 0;
477
539
break;
478
540
case 131: /* --groupid */
479
errno = 0;
480
tmpmax = strtoimax(arg, &tmp, 10);
541
tmp_id = strtoimax(arg, &tmp, 10);
481
542
if(errno != 0 or tmp == arg or *tmp != '\0'
482
or tmpmax != (gid_t)tmpmax){
483
fprintf(stderr, "Bad group ID number: \"%s\", using %"
484
PRIdMAX "\n", arg, (intmax_t)gid);
485
} else {
486
gid = (gid_t)tmpmax;
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;
487
547
}
548
gid = (gid_t)tmp_id;
549
errno = 0;
488
550
break;
489
551
case 132: /* --debug */
490
552
debug = true;
491
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;
492
575
/*
493
576
* When adding more options before this line, remember to also add a
494
577
* "case" to the "parse_opt_config_file" function below.
497
580
/* Cryptsetup always passes an argument, which is an empty
498
581
string if "none" was specified in /etc/crypttab. So if
499
582
argument was empty, we ignore it silently. */
500
if(arg[0] != '\0'){
501
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
583
if(arg[0] == '\0'){
584
break;
502
585
}
503
break;
504
case ARGP_KEY_END:
505
break;
506
586
default:
507
587
return ARGP_ERR_UNKNOWN;
508
588
}
509
return 0;
589
return errno; /* Set to 0 at start */
510
590
}
511
591
512
592
/* This option parser is the same as parse_opt() above, except it
514
594
error_t parse_opt_config_file(int key, char *arg,
515
595
__attribute__((unused))
516
596
struct argp_state *state){
597
errno = 0;
517
598
switch(key){
518
599
case 'g': /* --global-options */
519
600
case 'G': /* --global-env */
526
607
case 129: /* --config-file */
527
608
free(argfile);
528
609
argfile = strdup(arg);
529
if(argfile == NULL){
530
perror("strdup");
610
if(argfile != NULL){
611
errno = 0;
531
612
}
532
613
break;
533
614
case 130: /* --userid */
534
615
case 131: /* --groupid */
535
616
case 132: /* --debug */
617
case 133: /* --plugin-helper-dir */
618
case '?': /* --help */
619
case -3: /* --usage */
620
case 'V': /* --version */
536
621
case ARGP_KEY_ARG:
537
case ARGP_KEY_END:
538
622
break;
539
623
default:
540
624
return ARGP_ERR_UNKNOWN;
541
625
}
542
return 0;
626
return errno;
543
627
}
544
628
545
629
struct argp argp = { .options = options,
549
633
550
634
/* Parse using parse_opt_config_file() in order to get the custom
551
635
config file location, if any. */
552
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
553
if(ret == ARGP_ERR_UNKNOWN){
554
fprintf(stderr, "Unknown error while parsing arguments\n");
555
exitstatus = EXIT_FAILURE;
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;
556
650
goto fallback;
557
651
}
558
652
575
669
custom_argc = 1;
576
670
custom_argv = malloc(sizeof(char*) * 2);
577
671
if(custom_argv == NULL){
578
perror("malloc");
579
exitstatus = EXIT_FAILURE;
672
error(0, errno, "malloc");
673
exitstatus = EX_OSERR;
580
674
goto fallback;
581
675
}
582
676
custom_argv[0] = argv[0];
598
692
}
599
693
new_arg = strdup(p);
600
694
if(new_arg == NULL){
601
perror("strdup");
602
exitstatus = EXIT_FAILURE;
695
error(0, errno, "strdup");
696
exitstatus = EX_OSERR;
603
697
free(org_line);
604
698
goto fallback;
605
699
}
606
700
607
701
custom_argc += 1;
608
custom_argv = realloc(custom_argv, sizeof(char *)
609
* ((unsigned int) custom_argc + 1));
610
if(custom_argv == NULL){
611
perror("realloc");
612
exitstatus = EXIT_FAILURE;
613
free(org_line);
614
goto fallback;
702
{
703
char **new_argv = realloc(custom_argv, sizeof(char *)
704
* ((size_t)custom_argc + 1));
705
if(new_argv == NULL){
706
error(0, errno, "realloc");
707
exitstatus = EX_OSERR;
708
free(new_arg);
709
free(org_line);
710
goto fallback;
711
} else {
712
custom_argv = new_argv;
713
}
615
714
}
616
715
custom_argv[custom_argc-1] = new_arg;
617
716
custom_argv[custom_argc] = NULL;
618
717
}
619
718
}
620
do{
719
do {
621
720
ret = fclose(conffp);
622
}while(ret == EOF and errno == EINTR);
721
} while(ret == EOF and errno == EINTR);
623
722
if(ret == EOF){
624
perror("fclose");
625
exitstatus = EXIT_FAILURE;
723
error(0, errno, "fclose");
724
exitstatus = EX_IOERR;
626
725
goto fallback;
627
726
}
628
727
free(org_line);
630
729
/* Check for harmful errors and go to fallback. Other errors might
631
730
not affect opening plugins */
632
731
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
633
perror("fopen");
634
exitstatus = EXIT_FAILURE;
732
error(0, errno, "fopen");
733
exitstatus = EX_OSERR;
635
734
goto fallback;
636
735
}
637
736
}
638
/* If there was any arguments from configuration file,
639
pass them to parser as command arguments */
737
/* If there were any arguments from the configuration file, pass
738
them to parser as command line arguments */
640
739
if(custom_argv != NULL){
641
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
642
0, NULL);
643
if(ret == ARGP_ERR_UNKNOWN){
644
fprintf(stderr, "Unknown error while parsing arguments\n");
645
exitstatus = EXIT_FAILURE;
740
ret = argp_parse(&argp, custom_argc, custom_argv,
741
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
742
NULL, NULL);
743
switch(ret){
744
case 0:
745
break;
746
case ENOMEM:
747
default:
748
errno = ret;
749
error(0, errno, "argp_parse");
750
exitstatus = EX_OSERR;
751
goto fallback;
752
case EINVAL:
753
exitstatus = EX_CONFIG;
646
754
goto fallback;
647
755
}
648
756
}
649
757
650
758
/* Parse actual command line arguments, to let them override the
651
759
config file */
652
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
653
if(ret == ARGP_ERR_UNKNOWN){
654
fprintf(stderr, "Unknown error while parsing arguments\n");
655
exitstatus = EXIT_FAILURE;
656
goto fallback;
760
ret = argp_parse(&argp, argc, argv,
761
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
762
NULL, NULL);
763
switch(ret){
764
case 0:
765
break;
766
case ENOMEM:
767
default:
768
errno = ret;
769
error(0, errno, "argp_parse");
770
exitstatus = EX_OSERR;
771
goto fallback;
772
case EINVAL:
773
exitstatus = EX_USAGE;
774
goto fallback;
775
}
776
777
{
778
char *pluginhelperenv;
779
bool bret = true;
780
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
781
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
782
if(ret != -1){
783
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
784
}
785
if(ret == -1 or not bret){
786
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
787
" environment variable to \"%s\" for all plugins\n",
788
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
789
}
790
if(ret != -1){
791
free(pluginhelperenv);
792
}
657
793
}
658
794
659
795
if(debug){
670
806
}
671
807
}
672
808
673
/* Strip permissions down to nobody */
674
setgid(gid);
809
if(getuid() == 0){
810
/* Work around Debian bug #633582:
811
<http://bugs.debian.org/633582> */
812
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
813
if(plugindir_fd == -1){
814
if(errno != ENOENT){
815
error(0, errno, "open(\"" PDIR "\")");
816
}
817
} else {
818
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
819
if(ret == -1){
820
error(0, errno, "fstat");
821
} else {
822
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
823
ret = fchown(plugindir_fd, uid, gid);
824
if(ret == -1){
825
error(0, errno, "fchown");
826
}
827
}
828
}
829
close(plugindir_fd);
830
}
831
}
832
833
/* Lower permissions */
834
ret = setgid(gid);
675
835
if(ret == -1){
676
perror("setgid");
836
error(0, errno, "setgid");
677
837
}
678
838
ret = setuid(uid);
679
839
if(ret == -1){
680
perror("setuid");
681
}
682
683
if(plugindir == NULL){
684
dir = opendir(PDIR);
685
} else {
686
dir = opendir(plugindir);
687
}
688
689
if(dir == NULL){
690
perror("Could not open plugin dir");
691
exitstatus = EXIT_FAILURE;
692
goto fallback;
693
}
694
695
/* Set the FD_CLOEXEC flag on the directory, if possible */
840
error(0, errno, "setuid");
841
}
842
843
/* Open plugin directory with close_on_exec flag */
696
844
{
697
int dir_fd = dirfd(dir);
698
if(dir_fd >= 0){
699
ret = set_cloexec_flag(dir_fd);
700
if(ret < 0){
701
perror("set_cloexec_flag");
702
exitstatus = EXIT_FAILURE;
703
goto fallback;
845
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
846
#ifdef O_CLOEXEC
847
O_CLOEXEC
848
#else /* not O_CLOEXEC */
849
0
850
#endif /* not O_CLOEXEC */
851
);
852
if(dir_fd == -1){
853
error(0, errno, "Could not open plugin dir");
854
exitstatus = EX_UNAVAILABLE;
855
goto fallback;
856
}
857
858
#ifndef O_CLOEXEC
859
/* Set the FD_CLOEXEC flag on the directory */
860
ret = set_cloexec_flag(dir_fd);
861
if(ret < 0){
862
error(0, errno, "set_cloexec_flag");
863
exitstatus = EX_OSERR;
864
goto fallback;
865
}
866
#endif /* O_CLOEXEC */
867
}
868
869
int good_name(const struct dirent * const dirent){
870
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
871
"*.dpkg-old", "*.dpkg-bak",
872
"*.dpkg-divert", NULL };
873
#ifdef __GNUC__
874
#pragma GCC diagnostic push
875
#pragma GCC diagnostic ignored "-Wcast-qual"
876
#endif
877
for(const char **pat = (const char **)patterns;
878
*pat != NULL; pat++){
879
#ifdef __GNUC__
880
#pragma GCC diagnostic pop
881
#endif
882
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
883
!= FNM_NOMATCH){
884
if(debug){
885
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
886
" matching pattern %s\n", dirent->d_name, *pat);
887
}
888
return 0;
704
889
}
705
890
}
891
return 1;
892
}
893
894
#ifdef __GLIBC__
895
#if __GLIBC_PREREQ(2, 15)
896
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
897
alphasort);
898
#else /* not __GLIBC_PREREQ(2, 15) */
899
int numplugins = scandir(plugindir != NULL ? plugindir : PDIR,
900
&direntries, good_name, alphasort);
901
#endif /* not __GLIBC_PREREQ(2, 15) */
902
#else /* not __GLIBC__ */
903
int numplugins = scandir(plugindir != NULL ? plugindir : PDIR,
904
&direntries, good_name, alphasort);
905
#endif /* not __GLIBC__ */
906
if(numplugins == -1){
907
error(0, errno, "Could not scan plugin dir");
908
direntries = NULL;
909
exitstatus = EX_OSERR;
910
goto fallback;
706
911
}
707
912
708
913
FD_ZERO(&rfds_all);
709
914
710
915
/* Read and execute any executable in the plugin directory*/
711
while(true){
712
dirst = readdir(dir);
713
714
/* All directory entries have been processed */
715
if(dirst == NULL){
716
if(errno == EBADF){
717
perror("readdir");
718
exitstatus = EXIT_FAILURE;
719
goto fallback;
720
}
721
break;
722
}
723
724
d_name_len = strlen(dirst->d_name);
725
726
/* Ignore dotfiles, backup files and other junk */
727
{
728
bool bad_name = false;
729
730
const char const *bad_prefixes[] = { ".", "#", NULL };
731
732
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
733
".dpkg-old",
734
".dpkg-bak",
735
".dpkg-divert", NULL };
736
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
737
size_t pre_len = strlen(*pre);
738
if((d_name_len >= pre_len)
739
and strncmp((dirst->d_name), *pre, pre_len) == 0){
740
if(debug){
741
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
742
" with bad prefix %s\n", dirst->d_name, *pre);
743
}
744
bad_name = true;
745
break;
746
}
747
}
748
if(bad_name){
749
continue;
750
}
751
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
752
size_t suf_len = strlen(*suf);
753
if((d_name_len >= suf_len)
754
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
755
== 0)){
756
if(debug){
757
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
758
" with bad suffix %s\n", dirst->d_name, *suf);
759
}
760
bad_name = true;
761
break;
762
}
763
}
764
765
if(bad_name){
766
continue;
767
}
768
}
769
770
char *filename;
771
if(plugindir == NULL){
772
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
773
} else {
774
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
775
}
776
if(ret < 0){
777
perror("asprintf");
916
for(int i = 0; i < numplugins; i++){
917
918
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
919
if(plugin_fd == -1){
920
error(0, errno, "Could not open plugin");
921
free(direntries[i]);
778
922
continue;
779
923
}
780
781
ret = stat(filename, &st);
924
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
782
925
if(ret == -1){
783
perror("stat");
784
free(filename);
926
error(0, errno, "stat");
927
close(plugin_fd);
928
free(direntries[i]);
785
929
continue;
786
930
}
787
931
788
932
/* Ignore non-executable files */
789
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
933
if(not S_ISREG(st.st_mode)
934
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
935
X_OK, 0)) != 0)){
790
936
if(debug){
791
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
792
" with bad type or mode\n", filename);
937
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
938
" with bad type or mode\n",
939
plugindir != NULL ? plugindir : PDIR,
940
direntries[i]->d_name);
793
941
}
794
free(filename);
942
close(plugin_fd);
943
free(direntries[i]);
795
944
continue;
796
945
}
797
946
798
plugin *p = getplugin(dirst->d_name);
947
plugin *p = getplugin(direntries[i]->d_name);
799
948
if(p == NULL){
800
perror("getplugin");
801
free(filename);
949
error(0, errno, "getplugin");
950
close(plugin_fd);
951
free(direntries[i]);
802
952
continue;
803
953
}
804
954
if(p->disabled){
805
955
if(debug){
806
956
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
807
dirst->d_name);
957
direntries[i]->d_name);
808
958
}
809
free(filename);
959
close(plugin_fd);
960
free(direntries[i]);
810
961
continue;
811
962
}
812
963
{
815
966
if(g != NULL){
816
967
for(char **a = g->argv + 1; *a != NULL; a++){
817
968
if(not add_argument(p, *a)){
818
perror("add_argument");
969
error(0, errno, "add_argument");
819
970
}
820
971
}
821
972
/* Add global environment variables */
822
973
for(char **e = g->environ; *e != NULL; e++){
823
974
if(not add_environment(p, *e, false)){
824
perror("add_environment");
975
error(0, errno, "add_environment");
825
976
}
826
977
}
827
978
}
828
979
}
829
/* If this plugin has any environment variables, we will call
830
using execve and need to duplicate the environment from this
831
process, too. */
980
/* If this plugin has any environment variables, we need to
981
duplicate the environment from this process, too. */
832
982
if(p->environ[0] != NULL){
833
983
for(char **e = environ; *e != NULL; e++){
834
984
if(not add_environment(p, *e, false)){
835
perror("add_environment");
985
error(0, errno, "add_environment");
836
986
}
837
987
}
838
988
}
839
989
840
990
int pipefd[2];
841
ret = pipe(pipefd);
991
#ifndef O_CLOEXEC
992
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
993
#else /* O_CLOEXEC */
994
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
995
#endif /* O_CLOEXEC */
842
996
if(ret == -1){
843
perror("pipe");
844
exitstatus = EXIT_FAILURE;
845
goto fallback;
846
}
997
error(0, errno, "pipe");
998
exitstatus = EX_OSERR;
999
free(direntries[i]);
1000
goto fallback;
1001
}
1002
if(pipefd[0] >= FD_SETSIZE){
1003
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
1004
FD_SETSIZE);
1005
close(pipefd[0]);
1006
close(pipefd[1]);
1007
exitstatus = EX_OSERR;
1008
free(direntries[i]);
1009
goto fallback;
1010
}
1011
#ifndef O_CLOEXEC
847
1012
/* Ask OS to automatic close the pipe on exec */
848
1013
ret = set_cloexec_flag(pipefd[0]);
849
1014
if(ret < 0){
850
perror("set_cloexec_flag");
851
exitstatus = EXIT_FAILURE;
1015
error(0, errno, "set_cloexec_flag");
1016
close(pipefd[0]);
1017
close(pipefd[1]);
1018
exitstatus = EX_OSERR;
1019
free(direntries[i]);
852
1020
goto fallback;
853
1021
}
854
1022
ret = set_cloexec_flag(pipefd[1]);
855
1023
if(ret < 0){
856
perror("set_cloexec_flag");
857
exitstatus = EXIT_FAILURE;
1024
error(0, errno, "set_cloexec_flag");
1025
close(pipefd[0]);
1026
close(pipefd[1]);
1027
exitstatus = EX_OSERR;
1028
free(direntries[i]);
858
1029
goto fallback;
859
1030
}
1031
#endif /* not O_CLOEXEC */
860
1032
/* Block SIGCHLD until process is safely in process list */
861
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1033
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1034
&sigchld_action.sa_mask,
1035
NULL));
862
1036
if(ret < 0){
863
perror("sigprocmask");
864
exitstatus = EXIT_FAILURE;
1037
error(0, errno, "sigprocmask");
1038
exitstatus = EX_OSERR;
1039
free(direntries[i]);
865
1040
goto fallback;
866
1041
}
867
1042
/* Starting a new process to be watched */
868
pid_t pid = fork();
1043
pid_t pid;
1044
do {
1045
pid = fork();
1046
} while(pid == -1 and errno == EINTR);
869
1047
if(pid == -1){
870
perror("fork");
871
exitstatus = EXIT_FAILURE;
1048
error(0, errno, "fork");
1049
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1050
&sigchld_action.sa_mask, NULL));
1051
close(pipefd[0]);
1052
close(pipefd[1]);
1053
exitstatus = EX_OSERR;
1054
free(direntries[i]);
872
1055
goto fallback;
873
1056
}
874
1057
if(pid == 0){
875
1058
/* this is the child process */
876
1059
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
877
1060
if(ret < 0){
878
perror("sigaction");
879
_exit(EXIT_FAILURE);
1061
error(0, errno, "sigaction");
1062
_exit(EX_OSERR);
880
1063
}
881
1064
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
882
1065
if(ret < 0){
883
perror("sigprocmask");
884
_exit(EXIT_FAILURE);
1066
error(0, errno, "sigprocmask");
1067
_exit(EX_OSERR);
885
1068
}
886
1069
887
1070
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
888
1071
if(ret == -1){
889
perror("dup2");
890
_exit(EXIT_FAILURE);
1072
error(0, errno, "dup2");
1073
_exit(EX_OSERR);
891
1074
}
892
1075
893
if(dirfd(dir) < 0){
894
/* If dir has no file descriptor, we could not set FD_CLOEXEC
895
above and must now close it manually here. */
896
closedir(dir);
897
}
898
if(p->environ[0] == NULL){
899
if(execv(filename, p->argv) < 0){
900
perror("execv");
901
_exit(EXIT_FAILURE);
902
}
903
} else {
904
if(execve(filename, p->argv, p->environ) < 0){
905
perror("execve");
906
_exit(EXIT_FAILURE);
907
}
1076
if(fexecve(plugin_fd, p->argv,
1077
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1078
error(0, errno, "fexecve for %s/%s",
1079
plugindir != NULL ? plugindir : PDIR,
1080
direntries[i]->d_name);
1081
_exit(EX_OSERR);
908
1082
}
909
1083
/* no return */
910
1084
}
911
1085
/* Parent process */
912
1086
close(pipefd[1]); /* Close unused write end of pipe */
913
free(filename);
914
plugin *new_plugin = getplugin(dirst->d_name);
1087
close(plugin_fd);
1088
plugin *new_plugin = getplugin(direntries[i]->d_name);
915
1089
if(new_plugin == NULL){
916
perror("getplugin");
917
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1090
error(0, errno, "getplugin");
1091
ret = (int)(TEMP_FAILURE_RETRY
1092
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1093
NULL)));
918
1094
if(ret < 0){
919
perror("sigprocmask");
1095
error(0, errno, "sigprocmask");
920
1096
}
921
exitstatus = EXIT_FAILURE;
1097
exitstatus = EX_OSERR;
1098
free(direntries[i]);
922
1099
goto fallback;
923
1100
}
1101
free(direntries[i]);
924
1102
925
1103
new_plugin->pid = pid;
926
1104
new_plugin->fd = pipefd[0];
927
1105
928
1106
/* Unblock SIGCHLD so signal handler can be run if this process
929
1107
has already completed */
930
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1108
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1109
&sigchld_action.sa_mask,
1110
NULL));
931
1111
if(ret < 0){
932
perror("sigprocmask");
933
exitstatus = EXIT_FAILURE;
1112
error(0, errno, "sigprocmask");
1113
exitstatus = EX_OSERR;
934
1114
goto fallback;
935
1115
}
936
1116
937
FD_SET(new_plugin->fd, &rfds_all);
1117
#if defined (__GNUC__) and defined (__GLIBC__)
1118
#if not __GLIBC_PREREQ(2, 16)
1119
#pragma GCC diagnostic push
1120
#pragma GCC diagnostic ignored "-Wsign-conversion"
1121
#endif
1122
#endif
1123
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1124
-Wconversion in GNU libc
1125
before 2.16 */
1126
#if defined (__GNUC__) and defined (__GLIBC__)
1127
#if not __GLIBC_PREREQ(2, 16)
1128
#pragma GCC diagnostic pop
1129
#endif
1130
#endif
938
1131
939
1132
if(maxfd < new_plugin->fd){
940
1133
maxfd = new_plugin->fd;
941
1134
}
942
1135
}
943
1136
944
closedir(dir);
945
dir = NULL;
1137
free(direntries);
1138
direntries = NULL;
1139
close(dir_fd);
1140
dir_fd = -1;
946
1141
free_plugin(getplugin(NULL));
947
1142
948
1143
for(plugin *p = plugin_list; p != NULL; p = p->next){
960
1155
while(plugin_list){
961
1156
fd_set rfds = rfds_all;
962
1157
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
963
if(select_ret == -1){
964
perror("select");
965
exitstatus = EXIT_FAILURE;
1158
if(select_ret == -1 and errno != EINTR){
1159
error(0, errno, "select");
1160
exitstatus = EX_OSERR;
966
1161
goto fallback;
967
1162
}
968
1163
/* OK, now either a process completed, or something can be read
994
1189
}
995
1190
996
1191
/* Remove the plugin */
997
FD_CLR(proc->fd, &rfds_all);
1192
#if defined (__GNUC__) and defined (__GLIBC__)
1193
#if not __GLIBC_PREREQ(2, 16)
1194
#pragma GCC diagnostic push
1195
#pragma GCC diagnostic ignored "-Wsign-conversion"
1196
#endif
1197
#endif
1198
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1199
-Wconversion in GNU libc
1200
before 2.16 */
1201
#if defined (__GNUC__) and defined (__GLIBC__)
1202
#if not __GLIBC_PREREQ(2, 16)
1203
#pragma GCC diagnostic pop
1204
#endif
1205
#endif
998
1206
999
1207
/* Block signal while modifying process_list */
1000
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1208
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1209
(SIG_BLOCK,
1210
&sigchld_action.sa_mask,
1211
NULL));
1001
1212
if(ret < 0){
1002
perror("sigprocmask");
1003
exitstatus = EXIT_FAILURE;
1213
error(0, errno, "sigprocmask");
1214
exitstatus = EX_OSERR;
1004
1215
goto fallback;
1005
1216
}
1006
1217
1009
1220
proc = next_plugin;
1010
1221
1011
1222
/* We are done modifying process list, so unblock signal */
1012
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1013
NULL);
1223
ret = (int)(TEMP_FAILURE_RETRY
1224
(sigprocmask(SIG_UNBLOCK,
1225
&sigchld_action.sa_mask, NULL)));
1014
1226
if(ret < 0){
1015
perror("sigprocmask");
1016
exitstatus = EXIT_FAILURE;
1227
error(0, errno, "sigprocmask");
1228
exitstatus = EX_OSERR;
1017
1229
goto fallback;
1018
1230
}
1019
1231
1029
1241
bool bret = print_out_password(proc->buffer,
1030
1242
proc->buffer_length);
1031
1243
if(not bret){
1032
perror("print_out_password");
1033
exitstatus = EXIT_FAILURE;
1244
error(0, errno, "print_out_password");
1245
exitstatus = EX_IOERR;
1034
1246
}
1035
1247
goto fallback;
1036
1248
}
1037
1249
1038
1250
/* This process has not completed. Does it have any output? */
1039
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1251
#if defined (__GNUC__) and defined (__GLIBC__)
1252
#if not __GLIBC_PREREQ(2, 16)
1253
#pragma GCC diagnostic push
1254
#pragma GCC diagnostic ignored "-Wsign-conversion"
1255
#endif
1256
#endif
1257
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1258
warning from
1259
-Wconversion
1260
in GNU libc
1261
before
1262
2.16 */
1263
#if defined (__GNUC__) and defined (__GLIBC__)
1264
#if not __GLIBC_PREREQ(2, 16)
1265
#pragma GCC diagnostic pop
1266
#endif
1267
#endif
1040
1268
/* This process had nothing to say at this time */
1041
1269
proc = proc->next;
1042
1270
continue;
1043
1271
}
1044
1272
/* Before reading, make the process' data buffer large enough */
1045
1273
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1046
proc->buffer = realloc(proc->buffer, proc->buffer_size
1047
+ (size_t) BUFFER_SIZE);
1048
if(proc->buffer == NULL){
1049
perror("malloc");
1050
exitstatus = EXIT_FAILURE;
1274
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1275
+ (size_t) BUFFER_SIZE);
1276
if(new_buffer == NULL){
1277
error(0, errno, "malloc");
1278
exitstatus = EX_OSERR;
1051
1279
goto fallback;
1052
1280
}
1281
proc->buffer = new_buffer;
1053
1282
proc->buffer_size += BUFFER_SIZE;
1054
1283
}
1055
1284
/* Read from the process */
1056
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1057
BUFFER_SIZE);
1285
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1286
proc->buffer
1287
+ proc->buffer_length,
1288
BUFFER_SIZE));
1058
1289
if(sret < 0){
1059
1290
/* Read error from this process; ignore the error */
1060
1291
proc = proc->next;
1072
1303
1073
1304
fallback:
1074
1305
1075
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1306
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1307
and exitstatus != EX_OK)){
1076
1308
/* Fallback if all plugins failed, none are found or an error
1077
1309
occured */
1078
1310
bool bret;
1086
1318
}
1087
1319
bret = print_out_password(passwordbuffer, len);
1088
1320
if(not bret){
1089
perror("print_out_password");
1090
exitstatus = EXIT_FAILURE;
1321
error(0, errno, "print_out_password");
1322
exitstatus = EX_IOERR;
1091
1323
}
1092
1324
}
1093
1325
1094
1326
/* Restore old signal handler */
1095
1327
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1096
1328
if(ret == -1){
1097
perror("sigaction");
1098
exitstatus = EXIT_FAILURE;
1329
error(0, errno, "sigaction");
1330
exitstatus = EX_OSERR;
1099
1331
}
1100
1332
1101
1333
if(custom_argv != NULL){
1105
1337
free(custom_argv);
1106
1338
}
1107
1339
1108
if(dir != NULL){
1109
closedir(dir);
1340
free(direntries);
1341
1342
if(dir_fd != -1){
1343
close(dir_fd);
1110
1344
}
1111
1345
1112
1346
/* Kill the processes */
1116
1350
ret = kill(p->pid, SIGTERM);
1117
1351
if(ret == -1 and errno != ESRCH){
1118
1352
/* Set-uid proccesses might not get closed */
1119
perror("kill");
1353
error(0, errno, "kill");
1120
1354
}
1121
1355
}
1122
1356
}
1123
1357
1124
1358
/* Wait for any remaining child processes to terminate */
1125
do{
1359
do {
1126
1360
ret = wait(NULL);
1127
1361
} while(ret >= 0);
1128
1362
if(errno != ECHILD){
1129
perror("wait");
1363
error(0, errno, "wait");
1130
1364
}
1131
1365
1132
1366
free_plugin_list();
1133
1367
1134
1368
free(plugindir);
1369
free(pluginhelperdir);
1135
1370
free(argfile);
1136
1371
1137
1372
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0