To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to plugin-runner.c
- browse files at revision 237.2.11
- compare with another revision
- download diff
- download tarball
- view history from revision 237.2.11
- Committer: Teddy Hogeborn
- Date: 2009-01-17 02:12:05 UTC
- mto: (24.1.170 mandos) (237.4.29 release)
- mto: This revision was merged to the branch mainline in revision 273.
- Revision ID: teddy@fukt.bsnet.se-20090117021205-581c9f5ccub4576r
Tags: version-1.0.5-1
* Makefile (version): Changed to "1.0.5".
* NEWS (1.0.5): New entry.
* debian/changelog (1.0.5-1): - '' -
* NEWS (1.0.5): New entry.
* debian/changelog (1.0.5-1): - '' -
- files removed:
- DBUS-API
- debian/source
- network-hooks.d
- files modified:
- .bzrignore
added
removed
plugin-runner.c
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
1
/* -*- coding: utf-8 -*- */
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2008-2013 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() */
67
#include <inttypes.h> /* intmax_t, SCNdMAX, PRIdMAX, */
75
68
76
69
#define BUFFER_SIZE 256
77
70
79
72
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
80
73
81
74
const char *argp_program_version = "plugin-runner " VERSION;
82
const char *argp_program_bug_address = "<mandos@recompile.se>";
75
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
83
76
84
77
typedef struct plugin{
85
78
char *name; /* can be NULL or any plugin name */
88
81
char **environ;
89
82
int envc;
90
83
bool disabled;
91
84
92
85
/* Variables used for running processes*/
93
86
pid_t pid;
94
87
int fd;
96
89
size_t buffer_size;
97
90
size_t buffer_length;
98
91
bool eof;
99
volatile sig_atomic_t completed;
100
int status;
92
volatile bool completed;
93
volatile int status;
101
94
struct plugin *next;
102
95
} plugin;
103
96
106
99
/* Gets an existing plugin based on name,
107
100
or if none is found, creates a new one */
108
101
static plugin *getplugin(char *name){
109
/* Check for existing plugin with that name */
102
/* Check for exiting plugin with that name */
110
103
for(plugin *p = plugin_list; p != NULL; p = p->next){
111
104
if((p->name == name)
112
105
or (p->name and name and (strcmp(p->name, name) == 0))){
114
107
}
115
108
}
116
109
/* 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);
110
plugin *new_plugin = malloc(sizeof(plugin));
121
111
if(new_plugin == NULL){
122
112
return NULL;
123
113
}
124
114
char *copy_name = NULL;
125
115
if(name != NULL){
126
do {
127
copy_name = strdup(name);
128
} while(copy_name == NULL and errno == EINTR);
116
copy_name = strdup(name);
129
117
if(copy_name == NULL){
130
int e = errno;
131
118
free(new_plugin);
132
errno = e;
133
119
return NULL;
134
120
}
135
121
}
136
122
137
*new_plugin = (plugin){ .name = copy_name,
138
.argc = 1,
139
.disabled = false,
140
.next = plugin_list };
123
*new_plugin = (plugin) { .name = copy_name,
124
.argc = 1,
125
.disabled = false,
126
.next = plugin_list };
141
127
142
do {
143
new_plugin->argv = malloc(sizeof(char *) * 2);
144
} while(new_plugin->argv == NULL and errno == EINTR);
128
new_plugin->argv = malloc(sizeof(char *) * 2);
145
129
if(new_plugin->argv == NULL){
146
int e = errno;
147
130
free(copy_name);
148
131
free(new_plugin);
149
errno = e;
150
132
return NULL;
151
133
}
152
134
new_plugin->argv[0] = copy_name;
153
135
new_plugin->argv[1] = NULL;
154
136
155
do {
156
new_plugin->environ = malloc(sizeof(char *));
157
} while(new_plugin->environ == NULL and errno == EINTR);
137
new_plugin->environ = malloc(sizeof(char *));
158
138
if(new_plugin->environ == NULL){
159
int e = errno;
160
139
free(copy_name);
161
140
free(new_plugin->argv);
162
141
free(new_plugin);
163
errno = e;
164
142
return NULL;
165
143
}
166
144
new_plugin->environ[0] = NULL;
171
149
}
172
150
173
151
/* Helper function for add_argument and add_environment */
174
__attribute__((nonnull))
175
152
static bool add_to_char_array(const char *new, char ***array,
176
153
int *len){
177
154
/* 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);
155
*array = realloc(*array, sizeof(char *)
156
* (size_t) ((*len) + 2));
183
157
/* Malloc check */
184
if(new_array == NULL){
158
if(*array == NULL){
185
159
return false;
186
160
}
187
*array = new_array;
188
161
/* Make a copy of the new string */
189
char *copy;
190
do {
191
copy = strdup(new);
192
} while(copy == NULL and errno == EINTR);
162
char *copy = strdup(new);
193
163
if(copy == NULL){
194
164
return false;
195
165
}
202
172
}
203
173
204
174
/* Add to a plugin's argument vector */
205
__attribute__((nonnull(2)))
206
175
static bool add_argument(plugin *p, const char *arg){
207
176
if(p == NULL){
208
177
return false;
211
180
}
212
181
213
182
/* Add to a plugin's environment */
214
__attribute__((nonnull(2)))
215
183
static bool add_environment(plugin *p, const char *def, bool replace){
216
184
if(p == NULL){
217
185
return false;
219
187
/* namelen = length of name of environment variable */
220
188
size_t namelen = (size_t)(strchrnul(def, '=') - def);
221
189
/* Search for this environment variable */
222
for(char **envdef = p->environ; *envdef != NULL; envdef++){
223
if(strncmp(*envdef, def, namelen + 1) == 0){
190
for(char **e = p->environ; *e != NULL; e++){
191
if(strncmp(*e, def, namelen + 1) == 0){
224
192
/* It already exists */
225
193
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){
194
char *new = realloc(*e, strlen(def) + 1);
195
if(new == NULL){
231
196
return false;
232
197
}
233
*envdef = new_envdef;
234
strcpy(*envdef, def);
198
*e = new;
199
strcpy(*e, def);
235
200
}
236
201
return true;
237
202
}
242
207
/*
243
208
* Based on the example in the GNU LibC manual chapter 13.13 "File
244
209
* Descriptor Flags".
245
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
210
* *Note File Descriptor Flags:(libc)Descriptor Flags.
246
211
*/
247
212
static int set_cloexec_flag(int fd){
248
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
213
int ret = fcntl(fd, F_GETFD, 0);
249
214
/* If reading the flags failed, return error indication now. */
250
215
if(ret < 0){
251
216
return ret;
252
217
}
253
218
/* Store modified flag word in the descriptor. */
254
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
255
ret | FD_CLOEXEC));
219
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
256
220
}
257
221
258
222
259
223
/* Mark processes as completed when they exit, and save their exit
260
224
status. */
261
225
static void handle_sigchld(__attribute__((unused)) int sig){
262
int old_errno = errno;
263
226
while(true){
264
227
plugin *proc = plugin_list;
265
228
int status;
269
232
break;
270
233
}
271
234
if(pid == -1){
272
if(errno == ECHILD){
273
/* No child processes */
274
break;
235
if(errno != ECHILD){
236
perror("waitpid");
275
237
}
276
error(0, errno, "waitpid");
238
/* No child processes */
239
break;
277
240
}
278
241
279
242
/* A child exited, find it in process_list */
285
248
continue;
286
249
}
287
250
proc->status = status;
288
proc->completed = 1;
251
proc->completed = true;
289
252
}
290
errno = old_errno;
291
253
}
292
254
293
255
/* Prints out a password to stdout */
294
__attribute__((nonnull))
295
256
static bool print_out_password(const char *buffer, size_t length){
296
257
ssize_t ret;
297
258
for(size_t written = 0; written < length; written += (size_t)ret){
305
266
}
306
267
307
268
/* Removes and free a plugin from the plugin list */
308
__attribute__((nonnull))
309
269
static void free_plugin(plugin *plugin_node){
310
270
311
271
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
317
277
}
318
278
free(plugin_node->environ);
319
279
free(plugin_node->buffer);
320
280
321
281
/* Removes the plugin from the singly-linked list */
322
282
if(plugin_node == plugin_list){
323
283
/* First one - simple */
350
310
struct dirent *dirst;
351
311
struct stat st;
352
312
fd_set rfds_all;
353
int ret, maxfd = 0;
313
int ret, numchars, maxfd = 0;
354
314
ssize_t sret;
315
intmax_t tmpmax;
355
316
uid_t uid = 65534;
356
317
gid_t gid = 65534;
357
318
bool debug = false;
366
327
sigemptyset(&sigchld_action.sa_mask);
367
328
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
368
329
if(ret == -1){
369
error(0, errno, "sigaddset");
370
exitstatus = EX_OSERR;
330
perror("sigaddset");
331
exitstatus = EXIT_FAILURE;
371
332
goto fallback;
372
333
}
373
334
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
374
335
if(ret == -1){
375
error(0, errno, "sigaction");
376
exitstatus = EX_OSERR;
336
perror("sigaction");
337
exitstatus = EXIT_FAILURE;
377
338
goto fallback;
378
339
}
379
340
411
372
.doc = "Group ID the plugins will run as", .group = 3 },
412
373
{ .name = "debug", .key = 132,
413
374
.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
375
{ .name = NULL }
424
376
};
425
377
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;
378
error_t parse_opt(int key, char *arg, __attribute__((unused))
379
struct argp_state *state) {
380
switch(key) {
432
381
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;
382
if(arg != NULL){
383
char *p;
384
while((p = strsep(&arg, ",")) != NULL){
385
if(p[0] == '\0'){
386
continue;
387
}
388
if(not add_argument(getplugin(NULL), p)){
389
perror("add_argument");
390
return ARGP_ERR_UNKNOWN;
438
391
}
439
392
}
440
393
}
441
394
break;
442
395
case 'G': /* --global-env */
443
add_environment(getplugin(NULL), arg, true);
396
if(arg == NULL){
397
break;
398
}
399
if(not add_environment(getplugin(NULL), arg, true)){
400
perror("add_environment");
401
}
444
402
break;
445
403
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;
404
if(arg != NULL){
405
char *p_name = strsep(&arg, ":");
406
if(p_name[0] == '\0' or arg == NULL){
407
break;
408
}
409
char *opt = strsep(&arg, ":");
410
if(opt[0] == '\0' or opt == NULL){
411
break;
412
}
413
char *p;
414
while((p = strsep(&opt, ",")) != NULL){
415
if(p[0] == '\0'){
416
continue;
417
}
418
if(not add_argument(getplugin(p_name), p)){
419
perror("add_argument");
420
return ARGP_ERR_UNKNOWN;
464
421
}
465
422
}
466
423
}
467
424
break;
468
425
case 'E': /* --env-for */
426
if(arg == NULL){
427
break;
428
}
469
429
{
470
430
char *envdef = strchr(arg, ':');
471
431
if(envdef == NULL){
472
argp_error(state, "No colon in \"%s\"", arg);
473
errno = EINVAL;
474
432
break;
475
433
}
476
434
*envdef = '\0';
477
envdef++;
478
if(arg[0] == '\0'){
479
argp_error(state, "Empty plugin name");
480
errno = EINVAL;
481
break;
435
if(not add_environment(getplugin(arg), envdef+1, true)){
436
perror("add_environment");
482
437
}
483
add_environment(getplugin(arg), envdef, true);
484
438
}
485
439
break;
486
440
case 'd': /* --disable */
487
{
441
if(arg != NULL){
488
442
plugin *p = getplugin(arg);
489
if(p != NULL){
490
p->disabled = true;
443
if(p == NULL){
444
return ARGP_ERR_UNKNOWN;
491
445
}
446
p->disabled = true;
492
447
}
493
448
break;
494
449
case 'e': /* --enable */
495
{
450
if(arg != NULL){
496
451
plugin *p = getplugin(arg);
497
if(p != NULL){
498
p->disabled = false;
452
if(p == NULL){
453
return ARGP_ERR_UNKNOWN;
499
454
}
455
p->disabled = false;
500
456
}
501
457
break;
502
458
case 128: /* --plugin-dir */
503
459
free(plugindir);
504
460
plugindir = strdup(arg);
461
if(plugindir == NULL){
462
perror("strdup");
463
}
505
464
break;
506
465
case 129: /* --config-file */
507
466
/* This is already done by parse_opt_config_file() */
508
467
break;
509
468
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;
469
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
470
if(ret < 1 or tmpmax != (uid_t)tmpmax
471
or arg[numchars] != '\0'){
472
fprintf(stderr, "Bad user ID number: \"%s\", using %"
473
PRIdMAX "\n", arg, (intmax_t)uid);
474
} else {
475
uid = (uid_t)tmpmax;
516
476
}
517
uid = (uid_t)tmp_id;
518
477
break;
519
478
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;
479
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
480
if(ret < 1 or tmpmax != (gid_t)tmpmax
481
or arg[numchars] != '\0'){
482
fprintf(stderr, "Bad group ID number: \"%s\", using %"
483
PRIdMAX "\n", arg, (intmax_t)gid);
484
} else {
485
gid = (gid_t)tmpmax;
526
486
}
527
gid = (gid_t)tmp_id;
528
487
break;
529
488
case 132: /* --debug */
530
489
debug = true;
531
490
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
491
/*
547
492
* When adding more options before this line, remember to also add a
548
493
* "case" to the "parse_opt_config_file" function below.
551
496
/* Cryptsetup always passes an argument, which is an empty
552
497
string if "none" was specified in /etc/crypttab. So if
553
498
argument was empty, we ignore it silently. */
554
if(arg[0] == '\0'){
555
break;
499
if(arg[0] != '\0'){
500
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
556
501
}
502
break;
503
case ARGP_KEY_END:
504
break;
557
505
default:
558
506
return ARGP_ERR_UNKNOWN;
559
507
}
560
return errno; /* Set to 0 at start */
508
return 0;
561
509
}
562
510
563
511
/* This option parser is the same as parse_opt() above, except it
564
512
ignores everything but the --config-file option. */
565
513
error_t parse_opt_config_file(int key, char *arg,
566
514
__attribute__((unused))
567
struct argp_state *state){
568
errno = 0;
569
switch(key){
515
struct argp_state *state) {
516
switch(key) {
570
517
case 'g': /* --global-options */
571
518
case 'G': /* --global-env */
572
519
case 'o': /* --options-for */
578
525
case 129: /* --config-file */
579
526
free(argfile);
580
527
argfile = strdup(arg);
581
break;
528
if(argfile == NULL){
529
perror("strdup");
530
}
531
break;
582
532
case 130: /* --userid */
583
533
case 131: /* --groupid */
584
534
case 132: /* --debug */
585
case '?': /* --help */
586
case -3: /* --usage */
587
case 'V': /* --version */
588
535
case ARGP_KEY_ARG:
536
case ARGP_KEY_END:
589
537
break;
590
538
default:
591
539
return ARGP_ERR_UNKNOWN;
592
540
}
593
return errno;
541
return 0;
594
542
}
595
543
596
544
struct argp argp = { .options = options,
600
548
601
549
/* Parse using parse_opt_config_file() in order to get the custom
602
550
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;
551
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
552
if(ret == ARGP_ERR_UNKNOWN){
553
fprintf(stderr, "Unknown error while parsing arguments\n");
554
exitstatus = EXIT_FAILURE;
617
555
goto fallback;
618
556
}
619
557
625
563
conffp = fopen(AFILE, "r");
626
564
} else {
627
565
conffp = fopen(argfile, "r");
628
}
566
}
629
567
if(conffp != NULL){
630
568
char *org_line = NULL;
631
569
char *p, *arg, *new_arg, *line;
632
570
size_t size = 0;
633
571
const char whitespace_delims[] = " \r\t\f\v\n";
634
572
const char comment_delim[] = "#";
635
573
636
574
custom_argc = 1;
637
575
custom_argv = malloc(sizeof(char*) * 2);
638
576
if(custom_argv == NULL){
639
error(0, errno, "malloc");
640
exitstatus = EX_OSERR;
577
perror("malloc");
578
exitstatus = EXIT_FAILURE;
641
579
goto fallback;
642
580
}
643
581
custom_argv[0] = argv[0];
644
582
custom_argv[1] = NULL;
645
583
646
584
/* for each line in the config file, strip whitespace and ignore
647
585
commented text */
648
586
while(true){
650
588
if(sret == -1){
651
589
break;
652
590
}
653
591
654
592
line = org_line;
655
593
arg = strsep(&line, comment_delim);
656
594
while((p = strsep(&arg, whitespace_delims)) != NULL){
659
597
}
660
598
new_arg = strdup(p);
661
599
if(new_arg == NULL){
662
error(0, errno, "strdup");
663
exitstatus = EX_OSERR;
600
perror("strdup");
601
exitstatus = EXIT_FAILURE;
664
602
free(org_line);
665
603
goto fallback;
666
604
}
667
605
668
606
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
}
607
custom_argv = realloc(custom_argv, sizeof(char *)
608
* ((unsigned int) custom_argc + 1));
609
if(custom_argv == NULL){
610
perror("realloc");
611
exitstatus = EXIT_FAILURE;
612
free(org_line);
613
goto fallback;
682
614
}
683
615
custom_argv[custom_argc-1] = new_arg;
684
custom_argv[custom_argc] = NULL;
616
custom_argv[custom_argc] = NULL;
685
617
}
686
618
}
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
619
free(org_line);
696
620
} else {
697
621
/* Check for harmful errors and go to fallback. Other errors might
698
622
not affect opening plugins */
699
623
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
700
error(0, errno, "fopen");
701
exitstatus = EX_OSERR;
624
perror("fopen");
625
exitstatus = EXIT_FAILURE;
702
626
goto fallback;
703
627
}
704
628
}
705
/* If there were any arguments from the configuration file, pass
706
them to parser as command line arguments */
629
/* If there was any arguments from configuration file,
630
pass them to parser as command arguments */
707
631
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;
632
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
633
0, NULL);
634
if(ret == ARGP_ERR_UNKNOWN){
635
fprintf(stderr, "Unknown error while parsing arguments\n");
636
exitstatus = EXIT_FAILURE;
722
637
goto fallback;
723
638
}
724
639
}
725
640
726
641
/* Parse actual command line arguments, to let them override the
727
642
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;
643
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
644
if(ret == ARGP_ERR_UNKNOWN){
645
fprintf(stderr, "Unknown error while parsing arguments\n");
646
exitstatus = EXIT_FAILURE;
742
647
goto fallback;
743
648
}
744
649
756
661
}
757
662
}
758
663
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
}
664
/* Strip permissions down to nobody */
786
665
ret = setuid(uid);
787
666
if(ret == -1){
788
error(0, errno, "setuid");
789
}
790
791
/* Open plugin directory with close_on_exec flag */
667
perror("setuid");
668
}
669
setgid(gid);
670
if(ret == -1){
671
perror("setgid");
672
}
673
674
if(plugindir == NULL){
675
dir = opendir(PDIR);
676
} else {
677
dir = opendir(plugindir);
678
}
679
680
if(dir == NULL){
681
perror("Could not open plugin dir");
682
exitstatus = EXIT_FAILURE;
683
goto fallback;
684
}
685
686
/* Set the FD_CLOEXEC flag on the directory, if possible */
792
687
{
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;
688
int dir_fd = dirfd(dir);
689
if(dir_fd >= 0){
690
ret = set_cloexec_flag(dir_fd);
691
if(ret < 0){
692
perror("set_cloexec_flag");
693
exitstatus = EXIT_FAILURE;
694
goto fallback;
695
}
834
696
}
835
697
}
836
698
838
700
839
701
/* Read and execute any executable in the plugin directory*/
840
702
while(true){
841
do {
842
dirst = readdir(dir);
843
} while(dirst == NULL and errno == EINTR);
703
dirst = readdir(dir);
844
704
845
705
/* All directory entries have been processed */
846
706
if(dirst == NULL){
847
707
if(errno == EBADF){
848
error(0, errno, "readdir");
849
exitstatus = EX_IOERR;
708
perror("readdir");
709
exitstatus = EXIT_FAILURE;
850
710
goto fallback;
851
711
}
852
712
break;
858
718
{
859
719
bool bad_name = false;
860
720
861
const char * const bad_prefixes[] = { ".", "#", NULL };
721
const char const *bad_prefixes[] = { ".", "#", NULL };
862
722
863
const char * const bad_suffixes[] = { "~", "#", ".dpkg-new",
723
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
864
724
".dpkg-old",
865
725
".dpkg-bak",
866
726
".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
727
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
876
728
size_t pre_len = strlen(*pre);
877
729
if((d_name_len >= pre_len)
878
730
and strncmp((dirst->d_name), *pre, pre_len) == 0){
887
739
if(bad_name){
888
740
continue;
889
741
}
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
742
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
899
743
size_t suf_len = strlen(*suf);
900
744
if((d_name_len >= suf_len)
901
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
745
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
902
746
== 0)){
903
747
if(debug){
904
748
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
913
757
continue;
914
758
}
915
759
}
916
760
917
761
char *filename;
918
762
if(plugindir == NULL){
919
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
920
dirst->d_name));
763
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
921
764
} else {
922
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
923
plugindir,
924
dirst->d_name));
765
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
925
766
}
926
767
if(ret < 0){
927
error(0, errno, "asprintf");
768
perror("asprintf");
928
769
continue;
929
770
}
930
771
931
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
772
ret = stat(filename, &st);
932
773
if(ret == -1){
933
error(0, errno, "stat");
774
perror("stat");
934
775
free(filename);
935
776
continue;
936
777
}
937
778
938
779
/* Ignore non-executable files */
939
if(not S_ISREG(st.st_mode)
940
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
780
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
941
781
if(debug){
942
782
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
943
783
" with bad type or mode\n", filename);
948
788
949
789
plugin *p = getplugin(dirst->d_name);
950
790
if(p == NULL){
951
error(0, errno, "getplugin");
791
perror("getplugin");
952
792
free(filename);
953
793
continue;
954
794
}
966
806
if(g != NULL){
967
807
for(char **a = g->argv + 1; *a != NULL; a++){
968
808
if(not add_argument(p, *a)){
969
error(0, errno, "add_argument");
809
perror("add_argument");
970
810
}
971
811
}
972
812
/* Add global environment variables */
973
813
for(char **e = g->environ; *e != NULL; e++){
974
814
if(not add_environment(p, *e, false)){
975
error(0, errno, "add_environment");
815
perror("add_environment");
976
816
}
977
817
}
978
818
}
983
823
if(p->environ[0] != NULL){
984
824
for(char **e = environ; *e != NULL; e++){
985
825
if(not add_environment(p, *e, false)){
986
error(0, errno, "add_environment");
826
perror("add_environment");
987
827
}
988
828
}
989
829
}
990
830
991
831
int pipefd[2];
992
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
832
ret = pipe(pipefd);
993
833
if(ret == -1){
994
error(0, errno, "pipe");
995
exitstatus = EX_OSERR;
834
perror("pipe");
835
exitstatus = EXIT_FAILURE;
996
836
goto fallback;
997
837
}
998
838
/* Ask OS to automatic close the pipe on exec */
999
839
ret = set_cloexec_flag(pipefd[0]);
1000
840
if(ret < 0){
1001
error(0, errno, "set_cloexec_flag");
1002
exitstatus = EX_OSERR;
841
perror("set_cloexec_flag");
842
exitstatus = EXIT_FAILURE;
1003
843
goto fallback;
1004
844
}
1005
845
ret = set_cloexec_flag(pipefd[1]);
1006
846
if(ret < 0){
1007
error(0, errno, "set_cloexec_flag");
1008
exitstatus = EX_OSERR;
847
perror("set_cloexec_flag");
848
exitstatus = EXIT_FAILURE;
1009
849
goto fallback;
1010
850
}
1011
851
/* 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));
852
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1015
853
if(ret < 0){
1016
error(0, errno, "sigprocmask");
1017
exitstatus = EX_OSERR;
854
perror("sigprocmask");
855
exitstatus = EXIT_FAILURE;
1018
856
goto fallback;
1019
857
}
1020
858
/* Starting a new process to be watched */
1021
pid_t pid;
1022
do {
1023
pid = fork();
1024
} while(pid == -1 and errno == EINTR);
859
pid_t pid = fork();
1025
860
if(pid == -1){
1026
error(0, errno, "fork");
1027
exitstatus = EX_OSERR;
861
perror("fork");
862
exitstatus = EXIT_FAILURE;
1028
863
goto fallback;
1029
864
}
1030
865
if(pid == 0){
1031
866
/* this is the child process */
1032
867
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1033
868
if(ret < 0){
1034
error(0, errno, "sigaction");
1035
_exit(EX_OSERR);
869
perror("sigaction");
870
_exit(EXIT_FAILURE);
1036
871
}
1037
872
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1038
873
if(ret < 0){
1039
error(0, errno, "sigprocmask");
1040
_exit(EX_OSERR);
874
perror("sigprocmask");
875
_exit(EXIT_FAILURE);
1041
876
}
1042
877
1043
878
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1044
879
if(ret == -1){
1045
error(0, errno, "dup2");
1046
_exit(EX_OSERR);
880
perror("dup2");
881
_exit(EXIT_FAILURE);
1047
882
}
1048
883
1049
884
if(dirfd(dir) < 0){
1053
888
}
1054
889
if(p->environ[0] == NULL){
1055
890
if(execv(filename, p->argv) < 0){
1056
error(0, errno, "execv for %s", filename);
1057
_exit(EX_OSERR);
891
perror("execv");
892
_exit(EXIT_FAILURE);
1058
893
}
1059
894
} else {
1060
895
if(execve(filename, p->argv, p->environ) < 0){
1061
error(0, errno, "execve for %s", filename);
1062
_exit(EX_OSERR);
896
perror("execve");
897
_exit(EXIT_FAILURE);
1063
898
}
1064
899
}
1065
900
/* no return */
1066
901
}
1067
902
/* Parent process */
1068
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1069
pipe */
903
close(pipefd[1]); /* Close unused write end of pipe */
1070
904
free(filename);
1071
905
plugin *new_plugin = getplugin(dirst->d_name);
1072
906
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)));
907
perror("getplugin");
908
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1077
909
if(ret < 0){
1078
error(0, errno, "sigprocmask");
910
perror("sigprocmask");
1079
911
}
1080
exitstatus = EX_OSERR;
912
exitstatus = EXIT_FAILURE;
1081
913
goto fallback;
1082
914
}
1083
915
1086
918
1087
919
/* Unblock SIGCHLD so signal handler can be run if this process
1088
920
has already completed */
1089
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1090
&sigchld_action.sa_mask,
1091
NULL));
921
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1092
922
if(ret < 0){
1093
error(0, errno, "sigprocmask");
1094
exitstatus = EX_OSERR;
923
perror("sigprocmask");
924
exitstatus = EXIT_FAILURE;
1095
925
goto fallback;
1096
926
}
1097
927
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
928
FD_SET(new_plugin->fd, &rfds_all);
1112
929
1113
930
if(maxfd < new_plugin->fd){
1114
931
maxfd = new_plugin->fd;
1115
932
}
1116
933
}
1117
934
1118
TEMP_FAILURE_RETRY(closedir(dir));
935
closedir(dir);
1119
936
dir = NULL;
1120
free_plugin(getplugin(NULL));
1121
937
1122
938
for(plugin *p = plugin_list; p != NULL; p = p->next){
1123
939
if(p->pid != 0){
1134
950
while(plugin_list){
1135
951
fd_set rfds = rfds_all;
1136
952
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;
953
if(select_ret == -1){
954
perror("select");
955
exitstatus = EXIT_FAILURE;
1140
956
goto fallback;
1141
957
}
1142
958
/* OK, now either a process completed, or something can be read
1143
959
from one of them */
1144
960
for(plugin *proc = plugin_list; proc != NULL;){
1145
961
/* Is this process completely done? */
1146
if(proc->completed and proc->eof){
962
if(proc->eof and proc->completed){
1147
963
/* Only accept the plugin output if it exited cleanly */
1148
964
if(not WIFEXITED(proc->status)
1149
965
or WEXITSTATUS(proc->status) != 0){
1150
966
/* Bad exit by plugin */
1151
967
1152
968
if(debug){
1153
969
if(WIFEXITED(proc->status)){
1154
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1155
" status %d\n", proc->name,
1156
(intmax_t) (proc->pid),
970
fprintf(stderr, "Plugin %" PRIdMAX " exited with status"
971
" %d\n", (intmax_t) (proc->pid),
1157
972
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)));
973
} else if(WIFSIGNALED(proc->status)) {
974
fprintf(stderr, "Plugin %" PRIdMAX " killed by signal"
975
" %d\n", (intmax_t) (proc->pid),
976
WTERMSIG(proc->status));
1164
977
} else if(WCOREDUMP(proc->status)){
1165
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1166
" core\n", proc->name, (intmax_t) (proc->pid));
978
fprintf(stderr, "Plugin %" PRIdMAX " dumped core\n",
979
(intmax_t) (proc->pid));
1167
980
}
1168
981
}
1169
982
1170
983
/* 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
984
FD_CLR(proc->fd, &rfds_all);
985
1186
986
/* Block signal while modifying process_list */
1187
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1188
(SIG_BLOCK,
1189
&sigchld_action.sa_mask,
1190
NULL));
987
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1191
988
if(ret < 0){
1192
error(0, errno, "sigprocmask");
1193
exitstatus = EX_OSERR;
989
perror("sigprocmask");
990
exitstatus = EXIT_FAILURE;
1194
991
goto fallback;
1195
992
}
1196
993
1199
996
proc = next_plugin;
1200
997
1201
998
/* 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)));
999
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1000
NULL);
1205
1001
if(ret < 0){
1206
error(0, errno, "sigprocmask");
1207
exitstatus = EX_OSERR;
1002
perror("sigprocmask");
1003
exitstatus = EXIT_FAILURE;
1208
1004
goto fallback;
1209
1005
}
1210
1006
1220
1016
bool bret = print_out_password(proc->buffer,
1221
1017
proc->buffer_length);
1222
1018
if(not bret){
1223
error(0, errno, "print_out_password");
1224
exitstatus = EX_IOERR;
1019
perror("print_out_password");
1020
exitstatus = EXIT_FAILURE;
1225
1021
}
1226
1022
goto fallback;
1227
1023
}
1228
1024
1229
1025
/* 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
1026
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1247
1027
/* This process had nothing to say at this time */
1248
1028
proc = proc->next;
1249
1029
continue;
1250
1030
}
1251
1031
/* Before reading, make the process' data buffer large enough */
1252
1032
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;
1033
proc->buffer = realloc(proc->buffer, proc->buffer_size
1034
+ (size_t) BUFFER_SIZE);
1035
if(proc->buffer == NULL){
1036
perror("malloc");
1037
exitstatus = EXIT_FAILURE;
1258
1038
goto fallback;
1259
1039
}
1260
proc->buffer = new_buffer;
1261
1040
proc->buffer_size += BUFFER_SIZE;
1262
1041
}
1263
1042
/* Read from the process */
1264
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1265
proc->buffer
1266
+ proc->buffer_length,
1267
BUFFER_SIZE));
1043
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1044
BUFFER_SIZE);
1268
1045
if(sret < 0){
1269
1046
/* Read error from this process; ignore the error */
1270
1047
proc = proc->next;
1278
1055
}
1279
1056
}
1280
1057
}
1281
1282
1058
1059
1283
1060
fallback:
1284
1061
1285
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1286
and exitstatus != EX_OK)){
1062
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1287
1063
/* Fallback if all plugins failed, none are found or an error
1288
1064
occured */
1289
1065
bool bret;
1297
1073
}
1298
1074
bret = print_out_password(passwordbuffer, len);
1299
1075
if(not bret){
1300
error(0, errno, "print_out_password");
1301
exitstatus = EX_IOERR;
1076
perror("print_out_password");
1077
exitstatus = EXIT_FAILURE;
1302
1078
}
1303
1079
}
1304
1080
1305
1081
/* Restore old signal handler */
1306
1082
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1307
1083
if(ret == -1){
1308
error(0, errno, "sigaction");
1309
exitstatus = EX_OSERR;
1084
perror("sigaction");
1085
exitstatus = EXIT_FAILURE;
1310
1086
}
1311
1087
1312
1088
if(custom_argv != NULL){
1327
1103
ret = kill(p->pid, SIGTERM);
1328
1104
if(ret == -1 and errno != ESRCH){
1329
1105
/* Set-uid proccesses might not get closed */
1330
error(0, errno, "kill");
1106
perror("kill");
1331
1107
}
1332
1108
}
1333
1109
}
1334
1110
1335
1111
/* Wait for any remaining child processes to terminate */
1336
do {
1112
do{
1337
1113
ret = wait(NULL);
1338
1114
} while(ret >= 0);
1339
1115
if(errno != ECHILD){
1340
error(0, errno, "wait");
1116
perror("wait");
1341
1117
}
1342
1118
1343
1119
free_plugin_list();
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0