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- Committer: Teddy Hogeborn
- Date: 2009-01-13 04:35:19 UTC
- Revision ID: teddy@fukt.bsnet.se-20090113043519-0yr39snphoegq8l1
* plugin-runner.c: Only space changes.
* plugins.d/mandos-client.c: - '' -
* plugins.d/password-prompt.c: - '' -
* plugins.d/mandos-client.c: - '' -
* plugins.d/password-prompt.c: - '' -
- files removed:
- DBUS-API
- debian/source
- network-hooks.d
- files renamed:
- mandos-ctl => mandos-list
- 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 © 2008-2013 Teddy Hogeborn
6
* Copyright © 2008-2013 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
asprintf(), O_CLOEXEC */
26
asprintf() */
27
27
#include <stddef.h> /* size_t, NULL */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
29
realloc() */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
EXIT_SUCCESS, realloc() */
30
30
#include <stdbool.h> /* bool, true, false */
31
#include <stdio.h> /* fileno(), fprintf(),
31
#include <stdio.h> /* perror, fileno(), fprintf(),
32
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, fdopendir(), stat(), struct
33
#include <sys/types.h> /* DIR, opendir(), stat(), struct
34
34
stat, waitpid(), WIFEXITED(),
35
35
WEXITSTATUS(), wait(), pid_t,
36
36
uid_t, gid_t, getuid(), getgid(),
38
38
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
39
39
FD_SET(), FD_ISSET(), FD_CLR */
40
40
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
WEXITSTATUS(), WTERMSIG(),
42
WCOREDUMP() */
41
WEXITSTATUS() */
43
42
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
44
43
#include <iso646.h> /* and, or, not */
45
#include <dirent.h> /* DIR, struct dirent, fdopendir(),
44
#include <dirent.h> /* DIR, struct dirent, opendir(),
46
45
readdir(), closedir(), dirfd() */
47
46
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
48
47
fcntl(), setuid(), setgid(),
53
52
close() */
54
53
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
55
54
FD_CLOEXEC */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal(), strcmp(), strncmp() */
55
#include <string.h> /* strsep, strlen(), asprintf() */
58
56
#include <errno.h> /* errno */
59
57
#include <argp.h> /* struct argp_option, struct
60
58
argp_state, struct argp,
64
62
#include <signal.h> /* struct sigaction, sigemptyset(),
65
63
sigaddset(), sigaction(),
66
64
sigprocmask(), SIG_BLOCK, SIGCHLD,
67
SIG_UNBLOCK, kill(), sig_atomic_t
68
*/
65
SIG_UNBLOCK, kill() */
69
66
#include <errno.h> /* errno, EBADF */
70
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
71
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,
72
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
73
#include <errno.h> /* errno */
74
#include <error.h> /* error() */
75
67
76
68
#define BUFFER_SIZE 256
77
69
79
71
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
80
72
81
73
const char *argp_program_version = "plugin-runner " VERSION;
82
const char *argp_program_bug_address = "<mandos@recompile.se>";
74
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
83
75
84
76
typedef struct plugin{
85
77
char *name; /* can be NULL or any plugin name */
88
80
char **environ;
89
81
int envc;
90
82
bool disabled;
91
83
92
84
/* Variables used for running processes*/
93
85
pid_t pid;
94
86
int fd;
96
88
size_t buffer_size;
97
89
size_t buffer_length;
98
90
bool eof;
99
volatile sig_atomic_t completed;
100
int status;
91
volatile bool completed;
92
volatile int status;
101
93
struct plugin *next;
102
94
} plugin;
103
95
106
98
/* Gets an existing plugin based on name,
107
99
or if none is found, creates a new one */
108
100
static plugin *getplugin(char *name){
109
/* Check for existing plugin with that name */
101
/* Check for exiting plugin with that name */
110
102
for(plugin *p = plugin_list; p != NULL; p = p->next){
111
103
if((p->name == name)
112
104
or (p->name and name and (strcmp(p->name, name) == 0))){
114
106
}
115
107
}
116
108
/* Create a new plugin */
117
plugin *new_plugin = NULL;
118
do {
119
new_plugin = malloc(sizeof(plugin));
120
} while(new_plugin == NULL and errno == EINTR);
109
plugin *new_plugin = malloc(sizeof(plugin));
121
110
if(new_plugin == NULL){
122
111
return NULL;
123
112
}
124
113
char *copy_name = NULL;
125
114
if(name != NULL){
126
do {
127
copy_name = strdup(name);
128
} while(copy_name == NULL and errno == EINTR);
115
copy_name = strdup(name);
129
116
if(copy_name == NULL){
130
int e = errno;
131
free(new_plugin);
132
errno = e;
133
117
return NULL;
134
118
}
135
119
}
136
120
137
*new_plugin = (plugin){ .name = copy_name,
138
.argc = 1,
139
.disabled = false,
140
.next = plugin_list };
121
*new_plugin = (plugin) { .name = copy_name,
122
.argc = 1,
123
.disabled = false,
124
.next = plugin_list };
141
125
142
do {
143
new_plugin->argv = malloc(sizeof(char *) * 2);
144
} while(new_plugin->argv == NULL and errno == EINTR);
126
new_plugin->argv = malloc(sizeof(char *) * 2);
145
127
if(new_plugin->argv == NULL){
146
int e = errno;
147
128
free(copy_name);
148
129
free(new_plugin);
149
errno = e;
150
130
return NULL;
151
131
}
152
132
new_plugin->argv[0] = copy_name;
153
133
new_plugin->argv[1] = NULL;
154
134
155
do {
156
new_plugin->environ = malloc(sizeof(char *));
157
} while(new_plugin->environ == NULL and errno == EINTR);
135
new_plugin->environ = malloc(sizeof(char *));
158
136
if(new_plugin->environ == NULL){
159
int e = errno;
160
137
free(copy_name);
161
138
free(new_plugin->argv);
162
139
free(new_plugin);
163
errno = e;
164
140
return NULL;
165
141
}
166
142
new_plugin->environ[0] = NULL;
171
147
}
172
148
173
149
/* Helper function for add_argument and add_environment */
174
__attribute__((nonnull))
175
150
static bool add_to_char_array(const char *new, char ***array,
176
151
int *len){
177
152
/* Resize the pointed-to array to hold one more pointer */
178
char **new_array = NULL;
179
do {
180
new_array = realloc(*array, sizeof(char *)
181
* (size_t) ((*len) + 2));
182
} while(new_array == NULL and errno == EINTR);
153
*array = realloc(*array, sizeof(char *)
154
* (size_t) ((*len) + 2));
183
155
/* Malloc check */
184
if(new_array == NULL){
156
if(*array == NULL){
185
157
return false;
186
158
}
187
*array = new_array;
188
159
/* Make a copy of the new string */
189
char *copy;
190
do {
191
copy = strdup(new);
192
} while(copy == NULL and errno == EINTR);
160
char *copy = strdup(new);
193
161
if(copy == NULL){
194
162
return false;
195
163
}
202
170
}
203
171
204
172
/* Add to a plugin's argument vector */
205
__attribute__((nonnull(2)))
206
173
static bool add_argument(plugin *p, const char *arg){
207
174
if(p == NULL){
208
175
return false;
211
178
}
212
179
213
180
/* Add to a plugin's environment */
214
__attribute__((nonnull(2)))
215
181
static bool add_environment(plugin *p, const char *def, bool replace){
216
182
if(p == NULL){
217
183
return false;
219
185
/* namelen = length of name of environment variable */
220
186
size_t namelen = (size_t)(strchrnul(def, '=') - def);
221
187
/* Search for this environment variable */
222
for(char **envdef = p->environ; *envdef != NULL; envdef++){
223
if(strncmp(*envdef, def, namelen + 1) == 0){
188
for(char **e = p->environ; *e != NULL; e++){
189
if(strncmp(*e, def, namelen + 1) == 0){
224
190
/* It already exists */
225
191
if(replace){
226
char *new_envdef;
227
do {
228
new_envdef = realloc(*envdef, strlen(def) + 1);
229
} while(new_envdef == NULL and errno == EINTR);
230
if(new_envdef == NULL){
192
char *new = realloc(*e, strlen(def) + 1);
193
if(new == NULL){
231
194
return false;
232
195
}
233
*envdef = new_envdef;
234
strcpy(*envdef, def);
196
*e = new;
197
strcpy(*e, def);
235
198
}
236
199
return true;
237
200
}
242
205
/*
243
206
* Based on the example in the GNU LibC manual chapter 13.13 "File
244
207
* Descriptor Flags".
245
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
208
* *Note File Descriptor Flags:(libc)Descriptor Flags.
246
209
*/
247
210
static int set_cloexec_flag(int fd){
248
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
211
int ret = fcntl(fd, F_GETFD, 0);
249
212
/* If reading the flags failed, return error indication now. */
250
213
if(ret < 0){
251
214
return ret;
252
215
}
253
216
/* Store modified flag word in the descriptor. */
254
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
255
ret | FD_CLOEXEC));
217
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
256
218
}
257
219
258
220
259
221
/* Mark processes as completed when they exit, and save their exit
260
222
status. */
261
223
static void handle_sigchld(__attribute__((unused)) int sig){
262
int old_errno = errno;
263
224
while(true){
264
225
plugin *proc = plugin_list;
265
226
int status;
269
230
break;
270
231
}
271
232
if(pid == -1){
272
if(errno == ECHILD){
273
/* No child processes */
274
break;
233
if(errno != ECHILD){
234
perror("waitpid");
275
235
}
276
error(0, errno, "waitpid");
236
/* No child processes */
237
break;
277
238
}
278
239
279
240
/* A child exited, find it in process_list */
285
246
continue;
286
247
}
287
248
proc->status = status;
288
proc->completed = 1;
249
proc->completed = true;
289
250
}
290
errno = old_errno;
291
251
}
292
252
293
253
/* Prints out a password to stdout */
294
__attribute__((nonnull))
295
254
static bool print_out_password(const char *buffer, size_t length){
296
255
ssize_t ret;
297
256
for(size_t written = 0; written < length; written += (size_t)ret){
305
264
}
306
265
307
266
/* Removes and free a plugin from the plugin list */
308
__attribute__((nonnull))
309
267
static void free_plugin(plugin *plugin_node){
310
268
311
269
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
317
275
}
318
276
free(plugin_node->environ);
319
277
free(plugin_node->buffer);
320
278
321
279
/* Removes the plugin from the singly-linked list */
322
280
if(plugin_node == plugin_list){
323
281
/* First one - simple */
366
324
sigemptyset(&sigchld_action.sa_mask);
367
325
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
368
326
if(ret == -1){
369
error(0, errno, "sigaddset");
370
exitstatus = EX_OSERR;
327
perror("sigaddset");
328
exitstatus = EXIT_FAILURE;
371
329
goto fallback;
372
330
}
373
331
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
374
332
if(ret == -1){
375
error(0, errno, "sigaction");
376
exitstatus = EX_OSERR;
333
perror("sigaction");
334
exitstatus = EXIT_FAILURE;
377
335
goto fallback;
378
336
}
379
337
411
369
.doc = "Group ID the plugins will run as", .group = 3 },
412
370
{ .name = "debug", .key = 132,
413
371
.doc = "Debug mode", .group = 4 },
414
/*
415
* These reproduce what we would get without ARGP_NO_HELP
416
*/
417
{ .name = "help", .key = '?',
418
.doc = "Give this help list", .group = -1 },
419
{ .name = "usage", .key = -3,
420
.doc = "Give a short usage message", .group = -1 },
421
{ .name = "version", .key = 'V',
422
.doc = "Print program version", .group = -1 },
423
372
{ .name = NULL }
424
373
};
425
374
426
__attribute__((nonnull(3)))
427
error_t parse_opt(int key, char *arg, struct argp_state *state){
428
errno = 0;
429
switch(key){
430
char *tmp;
431
intmax_t tmp_id;
375
error_t parse_opt(int key, char *arg, __attribute__((unused))
376
struct argp_state *state) {
377
switch(key) {
432
378
case 'g': /* --global-options */
433
{
434
char *plugin_option;
435
while((plugin_option = strsep(&arg, ",")) != NULL){
436
if(not add_argument(getplugin(NULL), plugin_option)){
437
break;
379
if(arg != NULL){
380
char *p;
381
while((p = strsep(&arg, ",")) != NULL){
382
if(p[0] == '\0'){
383
continue;
384
}
385
if(not add_argument(getplugin(NULL), p)){
386
perror("add_argument");
387
return ARGP_ERR_UNKNOWN;
438
388
}
439
389
}
440
390
}
441
391
break;
442
392
case 'G': /* --global-env */
443
add_environment(getplugin(NULL), arg, true);
393
if(arg == NULL){
394
break;
395
}
396
if(not add_environment(getplugin(NULL), arg, true)){
397
perror("add_environment");
398
}
444
399
break;
445
400
case 'o': /* --options-for */
446
{
447
char *option_list = strchr(arg, ':');
448
if(option_list == NULL){
449
argp_error(state, "No colon in \"%s\"", arg);
450
errno = EINVAL;
451
break;
452
}
453
*option_list = '\0';
454
option_list++;
455
if(arg[0] == '\0'){
456
argp_error(state, "Empty plugin name");
457
errno = EINVAL;
458
break;
459
}
460
char *option;
461
while((option = strsep(&option_list, ",")) != NULL){
462
if(not add_argument(getplugin(arg), option)){
463
break;
401
if(arg != NULL){
402
char *p_name = strsep(&arg, ":");
403
if(p_name[0] == '\0' or arg == NULL){
404
break;
405
}
406
char *opt = strsep(&arg, ":");
407
if(opt[0] == '\0' or opt == NULL){
408
break;
409
}
410
char *p;
411
while((p = strsep(&opt, ",")) != NULL){
412
if(p[0] == '\0'){
413
continue;
414
}
415
if(not add_argument(getplugin(p_name), p)){
416
perror("add_argument");
417
return ARGP_ERR_UNKNOWN;
464
418
}
465
419
}
466
420
}
467
421
break;
468
422
case 'E': /* --env-for */
423
if(arg == NULL){
424
break;
425
}
469
426
{
470
427
char *envdef = strchr(arg, ':');
471
428
if(envdef == NULL){
472
argp_error(state, "No colon in \"%s\"", arg);
473
errno = EINVAL;
474
429
break;
475
430
}
476
431
*envdef = '\0';
477
envdef++;
478
if(arg[0] == '\0'){
479
argp_error(state, "Empty plugin name");
480
errno = EINVAL;
481
break;
432
if(not add_environment(getplugin(arg), envdef+1, true)){
433
perror("add_environment");
482
434
}
483
add_environment(getplugin(arg), envdef, true);
484
435
}
485
436
break;
486
437
case 'd': /* --disable */
487
{
438
if(arg != NULL){
488
439
plugin *p = getplugin(arg);
489
if(p != NULL){
490
p->disabled = true;
440
if(p == NULL){
441
return ARGP_ERR_UNKNOWN;
491
442
}
443
p->disabled = true;
492
444
}
493
445
break;
494
446
case 'e': /* --enable */
495
{
447
if(arg != NULL){
496
448
plugin *p = getplugin(arg);
497
if(p != NULL){
498
p->disabled = false;
449
if(p == NULL){
450
return ARGP_ERR_UNKNOWN;
499
451
}
452
p->disabled = false;
500
453
}
501
454
break;
502
455
case 128: /* --plugin-dir */
503
456
free(plugindir);
504
457
plugindir = strdup(arg);
458
if(plugindir == NULL){
459
perror("strdup");
460
}
505
461
break;
506
462
case 129: /* --config-file */
507
463
/* This is already done by parse_opt_config_file() */
508
464
break;
509
465
case 130: /* --userid */
510
tmp_id = strtoimax(arg, &tmp, 10);
511
if(errno != 0 or tmp == arg or *tmp != '\0'
512
or tmp_id != (uid_t)tmp_id){
513
argp_error(state, "Bad user ID number: \"%s\", using %"
514
PRIdMAX, arg, (intmax_t)uid);
515
break;
466
/* In the GNU C library, uid_t is always unsigned int */
467
ret = sscanf(arg, "%u", &uid);
468
if(ret != 1){
469
fprintf(stderr, "Bad user ID number: \"%s\", using %u\n", arg,
470
uid);
516
471
}
517
uid = (uid_t)tmp_id;
518
472
break;
519
473
case 131: /* --groupid */
520
tmp_id = strtoimax(arg, &tmp, 10);
521
if(errno != 0 or tmp == arg or *tmp != '\0'
522
or tmp_id != (gid_t)tmp_id){
523
argp_error(state, "Bad group ID number: \"%s\", using %"
524
PRIdMAX, arg, (intmax_t)gid);
525
break;
474
/* In the GNU C library, gid_t is always unsigned int */
475
ret = sscanf(arg, "%u", &gid);
476
if(ret != 1){
477
fprintf(stderr, "Bad group ID number: \"%s\", using %u\n",
478
arg, gid);
526
479
}
527
gid = (gid_t)tmp_id;
528
480
break;
529
481
case 132: /* --debug */
530
482
debug = true;
531
483
break;
532
/*
533
* These reproduce what we would get without ARGP_NO_HELP
534
*/
535
case '?': /* --help */
536
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
537
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
538
case -3: /* --usage */
539
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
540
argp_state_help(state, state->out_stream,
541
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
542
case 'V': /* --version */
543
fprintf(state->out_stream, "%s\n", argp_program_version);
544
exit(EXIT_SUCCESS);
545
break;
546
484
/*
547
485
* When adding more options before this line, remember to also add a
548
486
* "case" to the "parse_opt_config_file" function below.
551
489
/* Cryptsetup always passes an argument, which is an empty
552
490
string if "none" was specified in /etc/crypttab. So if
553
491
argument was empty, we ignore it silently. */
554
if(arg[0] == '\0'){
555
break;
492
if(arg[0] != '\0'){
493
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
556
494
}
495
break;
496
case ARGP_KEY_END:
497
break;
557
498
default:
558
499
return ARGP_ERR_UNKNOWN;
559
500
}
560
return errno; /* Set to 0 at start */
501
return 0;
561
502
}
562
503
563
504
/* This option parser is the same as parse_opt() above, except it
564
505
ignores everything but the --config-file option. */
565
506
error_t parse_opt_config_file(int key, char *arg,
566
507
__attribute__((unused))
567
struct argp_state *state){
568
errno = 0;
569
switch(key){
508
struct argp_state *state) {
509
switch(key) {
570
510
case 'g': /* --global-options */
571
511
case 'G': /* --global-env */
572
512
case 'o': /* --options-for */
578
518
case 129: /* --config-file */
579
519
free(argfile);
580
520
argfile = strdup(arg);
581
break;
521
if(argfile == NULL){
522
perror("strdup");
523
}
524
break;
582
525
case 130: /* --userid */
583
526
case 131: /* --groupid */
584
527
case 132: /* --debug */
585
case '?': /* --help */
586
case -3: /* --usage */
587
case 'V': /* --version */
588
528
case ARGP_KEY_ARG:
529
case ARGP_KEY_END:
589
530
break;
590
531
default:
591
532
return ARGP_ERR_UNKNOWN;
592
533
}
593
return errno;
534
return 0;
594
535
}
595
536
596
537
struct argp argp = { .options = options,
600
541
601
542
/* Parse using parse_opt_config_file() in order to get the custom
602
543
config file location, if any. */
603
ret = argp_parse(&argp, argc, argv,
604
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
605
NULL, NULL);
606
switch(ret){
607
case 0:
608
break;
609
case ENOMEM:
610
default:
611
errno = ret;
612
error(0, errno, "argp_parse");
613
exitstatus = EX_OSERR;
614
goto fallback;
615
case EINVAL:
616
exitstatus = EX_USAGE;
544
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
545
if(ret == ARGP_ERR_UNKNOWN){
546
fprintf(stderr, "Unknown error while parsing arguments\n");
547
exitstatus = EXIT_FAILURE;
617
548
goto fallback;
618
549
}
619
550
625
556
conffp = fopen(AFILE, "r");
626
557
} else {
627
558
conffp = fopen(argfile, "r");
628
}
559
}
629
560
if(conffp != NULL){
630
561
char *org_line = NULL;
631
562
char *p, *arg, *new_arg, *line;
632
563
size_t size = 0;
633
564
const char whitespace_delims[] = " \r\t\f\v\n";
634
565
const char comment_delim[] = "#";
635
566
636
567
custom_argc = 1;
637
568
custom_argv = malloc(sizeof(char*) * 2);
638
569
if(custom_argv == NULL){
639
error(0, errno, "malloc");
640
exitstatus = EX_OSERR;
570
perror("malloc");
571
exitstatus = EXIT_FAILURE;
641
572
goto fallback;
642
573
}
643
574
custom_argv[0] = argv[0];
644
575
custom_argv[1] = NULL;
645
576
646
577
/* for each line in the config file, strip whitespace and ignore
647
578
commented text */
648
579
while(true){
650
581
if(sret == -1){
651
582
break;
652
583
}
653
584
654
585
line = org_line;
655
586
arg = strsep(&line, comment_delim);
656
587
while((p = strsep(&arg, whitespace_delims)) != NULL){
659
590
}
660
591
new_arg = strdup(p);
661
592
if(new_arg == NULL){
662
error(0, errno, "strdup");
663
exitstatus = EX_OSERR;
593
perror("strdup");
594
exitstatus = EXIT_FAILURE;
664
595
free(org_line);
665
596
goto fallback;
666
597
}
667
598
668
599
custom_argc += 1;
669
{
670
char **new_argv = realloc(custom_argv, sizeof(char *)
671
* ((unsigned int)
672
custom_argc + 1));
673
if(new_argv == NULL){
674
error(0, errno, "realloc");
675
exitstatus = EX_OSERR;
676
free(new_arg);
677
free(org_line);
678
goto fallback;
679
} else {
680
custom_argv = new_argv;
681
}
600
custom_argv = realloc(custom_argv, sizeof(char *)
601
* ((unsigned int) custom_argc + 1));
602
if(custom_argv == NULL){
603
perror("realloc");
604
exitstatus = EXIT_FAILURE;
605
free(org_line);
606
goto fallback;
682
607
}
683
608
custom_argv[custom_argc-1] = new_arg;
684
custom_argv[custom_argc] = NULL;
609
custom_argv[custom_argc] = NULL;
685
610
}
686
611
}
687
do {
688
ret = fclose(conffp);
689
} while(ret == EOF and errno == EINTR);
690
if(ret == EOF){
691
error(0, errno, "fclose");
692
exitstatus = EX_IOERR;
693
goto fallback;
694
}
695
612
free(org_line);
696
613
} else {
697
614
/* Check for harmful errors and go to fallback. Other errors might
698
615
not affect opening plugins */
699
616
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
700
error(0, errno, "fopen");
701
exitstatus = EX_OSERR;
617
perror("fopen");
618
exitstatus = EXIT_FAILURE;
702
619
goto fallback;
703
620
}
704
621
}
705
/* If there were any arguments from the configuration file, pass
706
them to parser as command line arguments */
622
/* If there was any arguments from configuration file,
623
pass them to parser as command arguments */
707
624
if(custom_argv != NULL){
708
ret = argp_parse(&argp, custom_argc, custom_argv,
709
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
710
NULL, NULL);
711
switch(ret){
712
case 0:
713
break;
714
case ENOMEM:
715
default:
716
errno = ret;
717
error(0, errno, "argp_parse");
718
exitstatus = EX_OSERR;
719
goto fallback;
720
case EINVAL:
721
exitstatus = EX_CONFIG;
625
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
626
0, NULL);
627
if(ret == ARGP_ERR_UNKNOWN){
628
fprintf(stderr, "Unknown error while parsing arguments\n");
629
exitstatus = EXIT_FAILURE;
722
630
goto fallback;
723
631
}
724
632
}
725
633
726
634
/* Parse actual command line arguments, to let them override the
727
635
config file */
728
ret = argp_parse(&argp, argc, argv,
729
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
730
NULL, NULL);
731
switch(ret){
732
case 0:
733
break;
734
case ENOMEM:
735
default:
736
errno = ret;
737
error(0, errno, "argp_parse");
738
exitstatus = EX_OSERR;
739
goto fallback;
740
case EINVAL:
741
exitstatus = EX_USAGE;
636
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
637
if(ret == ARGP_ERR_UNKNOWN){
638
fprintf(stderr, "Unknown error while parsing arguments\n");
639
exitstatus = EXIT_FAILURE;
742
640
goto fallback;
743
641
}
744
642
749
647
for(char **a = p->argv; *a != NULL; a++){
750
648
fprintf(stderr, "\tArg: %s\n", *a);
751
649
}
752
fprintf(stderr, "...and %d environment variables\n", p->envc);
650
fprintf(stderr, "...and %u environment variables\n", p->envc);
753
651
for(char **a = p->environ; *a != NULL; a++){
754
652
fprintf(stderr, "\t%s\n", *a);
755
653
}
756
654
}
757
655
}
758
656
759
if(getuid() == 0){
760
/* Work around Debian bug #633582:
761
<http://bugs.debian.org/633582> */
762
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
763
if(plugindir_fd == -1){
764
error(0, errno, "open");
765
} else {
766
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
767
if(ret == -1){
768
error(0, errno, "fstat");
769
} else {
770
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
771
ret = fchown(plugindir_fd, uid, gid);
772
if(ret == -1){
773
error(0, errno, "fchown");
774
}
775
}
776
}
777
TEMP_FAILURE_RETRY(close(plugindir_fd));
778
}
779
}
780
781
/* Lower permissions */
782
ret = setgid(gid);
783
if(ret == -1){
784
error(0, errno, "setgid");
785
}
657
/* Strip permissions down to nobody */
786
658
ret = setuid(uid);
787
659
if(ret == -1){
788
error(0, errno, "setuid");
789
}
790
791
/* Open plugin directory with close_on_exec flag */
660
perror("setuid");
661
}
662
setgid(gid);
663
if(ret == -1){
664
perror("setgid");
665
}
666
667
if(plugindir == NULL){
668
dir = opendir(PDIR);
669
} else {
670
dir = opendir(plugindir);
671
}
672
673
if(dir == NULL){
674
perror("Could not open plugin dir");
675
exitstatus = EXIT_FAILURE;
676
goto fallback;
677
}
678
679
/* Set the FD_CLOEXEC flag on the directory, if possible */
792
680
{
793
int dir_fd = -1;
794
if(plugindir == NULL){
795
dir_fd = open(PDIR, O_RDONLY |
796
#ifdef O_CLOEXEC
797
O_CLOEXEC
798
#else /* not O_CLOEXEC */
799
0
800
#endif /* not O_CLOEXEC */
801
);
802
} else {
803
dir_fd = open(plugindir, O_RDONLY |
804
#ifdef O_CLOEXEC
805
O_CLOEXEC
806
#else /* not O_CLOEXEC */
807
0
808
#endif /* not O_CLOEXEC */
809
);
810
}
811
if(dir_fd == -1){
812
error(0, errno, "Could not open plugin dir");
813
exitstatus = EX_UNAVAILABLE;
814
goto fallback;
815
}
816
817
#ifndef O_CLOEXEC
818
/* Set the FD_CLOEXEC flag on the directory */
819
ret = set_cloexec_flag(dir_fd);
820
if(ret < 0){
821
error(0, errno, "set_cloexec_flag");
822
TEMP_FAILURE_RETRY(close(dir_fd));
823
exitstatus = EX_OSERR;
824
goto fallback;
825
}
826
#endif /* O_CLOEXEC */
827
828
dir = fdopendir(dir_fd);
829
if(dir == NULL){
830
error(0, errno, "Could not open plugin dir");
831
TEMP_FAILURE_RETRY(close(dir_fd));
832
exitstatus = EX_OSERR;
833
goto fallback;
681
int dir_fd = dirfd(dir);
682
if(dir_fd >= 0){
683
ret = set_cloexec_flag(dir_fd);
684
if(ret < 0){
685
perror("set_cloexec_flag");
686
exitstatus = EXIT_FAILURE;
687
goto fallback;
688
}
834
689
}
835
690
}
836
691
838
693
839
694
/* Read and execute any executable in the plugin directory*/
840
695
while(true){
841
do {
842
dirst = readdir(dir);
843
} while(dirst == NULL and errno == EINTR);
696
dirst = readdir(dir);
844
697
845
698
/* All directory entries have been processed */
846
699
if(dirst == NULL){
847
700
if(errno == EBADF){
848
error(0, errno, "readdir");
849
exitstatus = EX_IOERR;
701
perror("readdir");
702
exitstatus = EXIT_FAILURE;
850
703
goto fallback;
851
704
}
852
705
break;
858
711
{
859
712
bool bad_name = false;
860
713
861
const char * const bad_prefixes[] = { ".", "#", NULL };
714
const char const *bad_prefixes[] = { ".", "#", NULL };
862
715
863
const char * const bad_suffixes[] = { "~", "#", ".dpkg-new",
716
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
864
717
".dpkg-old",
865
718
".dpkg-bak",
866
719
".dpkg-divert", NULL };
867
#ifdef __GNUC__
868
#pragma GCC diagnostic push
869
#pragma GCC diagnostic ignored "-Wcast-qual"
870
#endif
871
for(const char **pre = (const char **)bad_prefixes;
872
*pre != NULL; pre++){
873
#ifdef __GNUC__
874
#pragma GCC diagnostic pop
875
#endif
720
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
876
721
size_t pre_len = strlen(*pre);
877
722
if((d_name_len >= pre_len)
878
723
and strncmp((dirst->d_name), *pre, pre_len) == 0){
887
732
if(bad_name){
888
733
continue;
889
734
}
890
#ifdef __GNUC__
891
#pragma GCC diagnostic push
892
#pragma GCC diagnostic ignored "-Wcast-qual"
893
#endif
894
for(const char **suf = (const char **)bad_suffixes;
895
*suf != NULL; suf++){
896
#ifdef __GNUC__
897
#pragma GCC diagnostic pop
898
#endif
735
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
899
736
size_t suf_len = strlen(*suf);
900
737
if((d_name_len >= suf_len)
901
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
738
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
902
739
== 0)){
903
740
if(debug){
904
741
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
913
750
continue;
914
751
}
915
752
}
916
753
917
754
char *filename;
918
755
if(plugindir == NULL){
919
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
920
dirst->d_name));
756
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
921
757
} else {
922
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
923
plugindir,
924
dirst->d_name));
758
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
925
759
}
926
760
if(ret < 0){
927
error(0, errno, "asprintf");
761
perror("asprintf");
928
762
continue;
929
763
}
930
764
931
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
765
ret = stat(filename, &st);
932
766
if(ret == -1){
933
error(0, errno, "stat");
767
perror("stat");
934
768
free(filename);
935
769
continue;
936
770
}
937
771
938
772
/* Ignore non-executable files */
939
if(not S_ISREG(st.st_mode)
940
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
773
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
941
774
if(debug){
942
775
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
943
776
" with bad type or mode\n", filename);
948
781
949
782
plugin *p = getplugin(dirst->d_name);
950
783
if(p == NULL){
951
error(0, errno, "getplugin");
784
perror("getplugin");
952
785
free(filename);
953
786
continue;
954
787
}
966
799
if(g != NULL){
967
800
for(char **a = g->argv + 1; *a != NULL; a++){
968
801
if(not add_argument(p, *a)){
969
error(0, errno, "add_argument");
802
perror("add_argument");
970
803
}
971
804
}
972
805
/* Add global environment variables */
973
806
for(char **e = g->environ; *e != NULL; e++){
974
807
if(not add_environment(p, *e, false)){
975
error(0, errno, "add_environment");
808
perror("add_environment");
976
809
}
977
810
}
978
811
}
983
816
if(p->environ[0] != NULL){
984
817
for(char **e = environ; *e != NULL; e++){
985
818
if(not add_environment(p, *e, false)){
986
error(0, errno, "add_environment");
819
perror("add_environment");
987
820
}
988
821
}
989
822
}
990
823
991
824
int pipefd[2];
992
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
825
ret = pipe(pipefd);
993
826
if(ret == -1){
994
error(0, errno, "pipe");
995
exitstatus = EX_OSERR;
827
perror("pipe");
828
exitstatus = EXIT_FAILURE;
996
829
goto fallback;
997
830
}
998
831
/* Ask OS to automatic close the pipe on exec */
999
832
ret = set_cloexec_flag(pipefd[0]);
1000
833
if(ret < 0){
1001
error(0, errno, "set_cloexec_flag");
1002
exitstatus = EX_OSERR;
834
perror("set_cloexec_flag");
835
exitstatus = EXIT_FAILURE;
1003
836
goto fallback;
1004
837
}
1005
838
ret = set_cloexec_flag(pipefd[1]);
1006
839
if(ret < 0){
1007
error(0, errno, "set_cloexec_flag");
1008
exitstatus = EX_OSERR;
840
perror("set_cloexec_flag");
841
exitstatus = EXIT_FAILURE;
1009
842
goto fallback;
1010
843
}
1011
844
/* Block SIGCHLD until process is safely in process list */
1012
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1013
&sigchld_action.sa_mask,
1014
NULL));
845
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1015
846
if(ret < 0){
1016
error(0, errno, "sigprocmask");
1017
exitstatus = EX_OSERR;
847
perror("sigprocmask");
848
exitstatus = EXIT_FAILURE;
1018
849
goto fallback;
1019
850
}
1020
851
/* Starting a new process to be watched */
1021
pid_t pid;
1022
do {
1023
pid = fork();
1024
} while(pid == -1 and errno == EINTR);
852
pid_t pid = fork();
1025
853
if(pid == -1){
1026
error(0, errno, "fork");
1027
exitstatus = EX_OSERR;
854
perror("fork");
855
exitstatus = EXIT_FAILURE;
1028
856
goto fallback;
1029
857
}
1030
858
if(pid == 0){
1031
859
/* this is the child process */
1032
860
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1033
861
if(ret < 0){
1034
error(0, errno, "sigaction");
1035
_exit(EX_OSERR);
862
perror("sigaction");
863
_exit(EXIT_FAILURE);
1036
864
}
1037
865
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1038
866
if(ret < 0){
1039
error(0, errno, "sigprocmask");
1040
_exit(EX_OSERR);
867
perror("sigprocmask");
868
_exit(EXIT_FAILURE);
1041
869
}
1042
870
1043
871
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1044
872
if(ret == -1){
1045
error(0, errno, "dup2");
1046
_exit(EX_OSERR);
873
perror("dup2");
874
_exit(EXIT_FAILURE);
1047
875
}
1048
876
1049
877
if(dirfd(dir) < 0){
1053
881
}
1054
882
if(p->environ[0] == NULL){
1055
883
if(execv(filename, p->argv) < 0){
1056
error(0, errno, "execv for %s", filename);
1057
_exit(EX_OSERR);
884
perror("execv");
885
_exit(EXIT_FAILURE);
1058
886
}
1059
887
} else {
1060
888
if(execve(filename, p->argv, p->environ) < 0){
1061
error(0, errno, "execve for %s", filename);
1062
_exit(EX_OSERR);
889
perror("execve");
890
_exit(EXIT_FAILURE);
1063
891
}
1064
892
}
1065
893
/* no return */
1066
894
}
1067
895
/* Parent process */
1068
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1069
pipe */
896
close(pipefd[1]); /* Close unused write end of pipe */
1070
897
free(filename);
1071
898
plugin *new_plugin = getplugin(dirst->d_name);
1072
899
if(new_plugin == NULL){
1073
error(0, errno, "getplugin");
1074
ret = (int)(TEMP_FAILURE_RETRY
1075
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1076
NULL)));
900
perror("getplugin");
901
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1077
902
if(ret < 0){
1078
error(0, errno, "sigprocmask");
903
perror("sigprocmask");
1079
904
}
1080
exitstatus = EX_OSERR;
905
exitstatus = EXIT_FAILURE;
1081
906
goto fallback;
1082
907
}
1083
908
1086
911
1087
912
/* Unblock SIGCHLD so signal handler can be run if this process
1088
913
has already completed */
1089
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1090
&sigchld_action.sa_mask,
1091
NULL));
914
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1092
915
if(ret < 0){
1093
error(0, errno, "sigprocmask");
1094
exitstatus = EX_OSERR;
916
perror("sigprocmask");
917
exitstatus = EXIT_FAILURE;
1095
918
goto fallback;
1096
919
}
1097
920
1098
#if defined (__GNUC__) and defined (__GLIBC__)
1099
#if not __GLIBC_PREREQ(2, 16)
1100
#pragma GCC diagnostic push
1101
#pragma GCC diagnostic ignored "-Wsign-conversion"
1102
#endif
1103
#endif
1104
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1105
-Wconversion in GNU libc
1106
before 2.16 */
1107
#if defined (__GNUC__) and defined (__GLIBC__)
1108
#if not __GLIBC_PREREQ(2, 16)
1109
#pragma GCC diagnostic pop
1110
#endif
1111
#endif
921
FD_SET(new_plugin->fd, &rfds_all);
1112
922
1113
923
if(maxfd < new_plugin->fd){
1114
924
maxfd = new_plugin->fd;
1115
925
}
1116
926
}
1117
927
1118
TEMP_FAILURE_RETRY(closedir(dir));
928
closedir(dir);
1119
929
dir = NULL;
1120
free_plugin(getplugin(NULL));
1121
930
1122
931
for(plugin *p = plugin_list; p != NULL; p = p->next){
1123
932
if(p->pid != 0){
1134
943
while(plugin_list){
1135
944
fd_set rfds = rfds_all;
1136
945
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1137
if(select_ret == -1 and errno != EINTR){
1138
error(0, errno, "select");
1139
exitstatus = EX_OSERR;
946
if(select_ret == -1){
947
perror("select");
948
exitstatus = EXIT_FAILURE;
1140
949
goto fallback;
1141
950
}
1142
951
/* OK, now either a process completed, or something can be read
1143
952
from one of them */
1144
953
for(plugin *proc = plugin_list; proc != NULL;){
1145
954
/* Is this process completely done? */
1146
if(proc->completed and proc->eof){
955
if(proc->eof and proc->completed){
1147
956
/* Only accept the plugin output if it exited cleanly */
1148
957
if(not WIFEXITED(proc->status)
1149
958
or WEXITSTATUS(proc->status) != 0){
1150
959
/* Bad exit by plugin */
1151
960
1152
961
if(debug){
1153
962
if(WIFEXITED(proc->status)){
1154
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1155
" status %d\n", proc->name,
1156
(intmax_t) (proc->pid),
963
fprintf(stderr, "Plugin %u exited with status %d\n",
964
(unsigned int) (proc->pid),
1157
965
WEXITSTATUS(proc->status));
1158
} else if(WIFSIGNALED(proc->status)){
1159
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1160
" signal %d: %s\n", proc->name,
1161
(intmax_t) (proc->pid),
1162
WTERMSIG(proc->status),
1163
strsignal(WTERMSIG(proc->status)));
966
} else if(WIFSIGNALED(proc->status)) {
967
fprintf(stderr, "Plugin %u killed by signal %d\n",
968
(unsigned int) (proc->pid),
969
WTERMSIG(proc->status));
1164
970
} else if(WCOREDUMP(proc->status)){
1165
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1166
" core\n", proc->name, (intmax_t) (proc->pid));
971
fprintf(stderr, "Plugin %u dumped core\n",
972
(unsigned int) (proc->pid));
1167
973
}
1168
974
}
1169
975
1170
976
/* Remove the plugin */
1171
#if defined (__GNUC__) and defined (__GLIBC__)
1172
#if not __GLIBC_PREREQ(2, 16)
1173
#pragma GCC diagnostic push
1174
#pragma GCC diagnostic ignored "-Wsign-conversion"
1175
#endif
1176
#endif
1177
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1178
-Wconversion in GNU libc
1179
before 2.16 */
1180
#if defined (__GNUC__) and defined (__GLIBC__)
1181
#if not __GLIBC_PREREQ(2, 16)
1182
#pragma GCC diagnostic pop
1183
#endif
1184
#endif
1185
977
FD_CLR(proc->fd, &rfds_all);
978
1186
979
/* Block signal while modifying process_list */
1187
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1188
(SIG_BLOCK,
1189
&sigchld_action.sa_mask,
1190
NULL));
980
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1191
981
if(ret < 0){
1192
error(0, errno, "sigprocmask");
1193
exitstatus = EX_OSERR;
982
perror("sigprocmask");
983
exitstatus = EXIT_FAILURE;
1194
984
goto fallback;
1195
985
}
1196
986
1199
989
proc = next_plugin;
1200
990
1201
991
/* We are done modifying process list, so unblock signal */
1202
ret = (int)(TEMP_FAILURE_RETRY
1203
(sigprocmask(SIG_UNBLOCK,
1204
&sigchld_action.sa_mask, NULL)));
992
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
993
NULL);
1205
994
if(ret < 0){
1206
error(0, errno, "sigprocmask");
1207
exitstatus = EX_OSERR;
995
perror("sigprocmask");
996
exitstatus = EXIT_FAILURE;
1208
997
goto fallback;
1209
998
}
1210
999
1220
1009
bool bret = print_out_password(proc->buffer,
1221
1010
proc->buffer_length);
1222
1011
if(not bret){
1223
error(0, errno, "print_out_password");
1224
exitstatus = EX_IOERR;
1012
perror("print_out_password");
1013
exitstatus = EXIT_FAILURE;
1225
1014
}
1226
1015
goto fallback;
1227
1016
}
1228
1017
1229
1018
/* This process has not completed. Does it have any output? */
1230
#if defined (__GNUC__) and defined (__GLIBC__)
1231
#if not __GLIBC_PREREQ(2, 16)
1232
#pragma GCC diagnostic push
1233
#pragma GCC diagnostic ignored "-Wsign-conversion"
1234
#endif
1235
#endif
1236
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1237
warning from
1238
-Wconversion
1239
in GNU libc
1240
before
1241
2.16 */
1242
#if defined (__GNUC__) and defined (__GLIBC__)
1243
#if not __GLIBC_PREREQ(2, 16)
1244
#pragma GCC diagnostic pop
1245
#endif
1246
#endif
1019
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1247
1020
/* This process had nothing to say at this time */
1248
1021
proc = proc->next;
1249
1022
continue;
1250
1023
}
1251
1024
/* Before reading, make the process' data buffer large enough */
1252
1025
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1253
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1254
+ (size_t) BUFFER_SIZE);
1255
if(new_buffer == NULL){
1256
error(0, errno, "malloc");
1257
exitstatus = EX_OSERR;
1026
proc->buffer = realloc(proc->buffer, proc->buffer_size
1027
+ (size_t) BUFFER_SIZE);
1028
if(proc->buffer == NULL){
1029
perror("malloc");
1030
exitstatus = EXIT_FAILURE;
1258
1031
goto fallback;
1259
1032
}
1260
proc->buffer = new_buffer;
1261
1033
proc->buffer_size += BUFFER_SIZE;
1262
1034
}
1263
1035
/* Read from the process */
1264
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1265
proc->buffer
1266
+ proc->buffer_length,
1267
BUFFER_SIZE));
1036
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1037
BUFFER_SIZE);
1268
1038
if(sret < 0){
1269
1039
/* Read error from this process; ignore the error */
1270
1040
proc = proc->next;
1278
1048
}
1279
1049
}
1280
1050
}
1281
1282
1051
1052
1283
1053
fallback:
1284
1054
1285
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1286
and exitstatus != EX_OK)){
1055
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1287
1056
/* Fallback if all plugins failed, none are found or an error
1288
1057
occured */
1289
1058
bool bret;
1297
1066
}
1298
1067
bret = print_out_password(passwordbuffer, len);
1299
1068
if(not bret){
1300
error(0, errno, "print_out_password");
1301
exitstatus = EX_IOERR;
1069
perror("print_out_password");
1070
exitstatus = EXIT_FAILURE;
1302
1071
}
1303
1072
}
1304
1073
1305
1074
/* Restore old signal handler */
1306
1075
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1307
1076
if(ret == -1){
1308
error(0, errno, "sigaction");
1309
exitstatus = EX_OSERR;
1077
perror("sigaction");
1078
exitstatus = EXIT_FAILURE;
1310
1079
}
1311
1080
1312
1081
if(custom_argv != NULL){
1327
1096
ret = kill(p->pid, SIGTERM);
1328
1097
if(ret == -1 and errno != ESRCH){
1329
1098
/* Set-uid proccesses might not get closed */
1330
error(0, errno, "kill");
1099
perror("kill");
1331
1100
}
1332
1101
}
1333
1102
}
1334
1103
1335
1104
/* Wait for any remaining child processes to terminate */
1336
do {
1105
do{
1337
1106
ret = wait(NULL);
1338
1107
} while(ret >= 0);
1339
1108
if(errno != ECHILD){
1340
error(0, errno, "wait");
1109
perror("wait");
1341
1110
}
1342
1111
1343
1112
free_plugin_list();
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0