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- Committer: Björn Påhlsson
- Date: 2009-02-09 19:34:28 UTC
- mfrom: (237.2.72 mandos)
- mto: (237.7.1 mandos) (24.1.154 mandos)
- mto: This revision was merged to the branch mainline in revision 270.
- Revision ID: belorn@braxen-20090209193428-2u3js3m87ckb84kc
merge
- files removed:
- DBUS-API
- debian/source
- debian/upstream
- 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 © 2008-2014 Teddy Hogeborn
6
* Copyright © 2008-2014 Björn Påhlsson
5
* Copyright © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 Björn Påhlsson
7
7
*
8
8
* This program is free software: you can redistribute it and/or
9
9
* modify it under the terms of the GNU General Public License as
19
19
* along with this program. If not, see
20
20
* <http://www.gnu.org/licenses/>.
21
21
*
22
* Contact the authors at <mandos@recompile.se>.
22
* Contact the authors at <mandos@fukt.bsnet.se>.
23
23
*/
24
24
25
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
O_CLOEXEC */
26
asprintf() */
27
27
#include <stddef.h> /* size_t, NULL */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
29
realloc() */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
EXIT_SUCCESS, realloc() */
30
30
#include <stdbool.h> /* bool, true, false */
31
#include <stdio.h> /* fileno(), fprintf(),
32
stderr, STDOUT_FILENO, fclose() */
33
#include <sys/types.h> /* DIR, fdopendir(), fstat(), struct
31
#include <stdio.h> /* perror, fileno(), fprintf(),
32
stderr, STDOUT_FILENO */
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() */
43
#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
41
WEXITSTATUS() */
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
#include <unistd.h> /* fcntl(), F_GETFD, F_SETFD,
48
FD_CLOEXEC, write(), STDOUT_FILENO,
49
struct stat, fstat(), close(),
50
setgid(), setuid(), S_ISREG(),
51
faccessat() pipe(), fork(),
52
_exit(), dup2(), fexecve(), read()
53
*/
46
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
47
fcntl(), setuid(), setgid(),
48
F_GETFD, F_SETFD, FD_CLOEXEC,
49
access(), pipe(), fork(), close()
50
dup2(), STDOUT_FILENO, _exit(),
51
execv(), write(), read(),
52
close() */
54
53
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
55
FD_CLOEXEC, openat() */
56
#include <string.h> /* strsep, strlen(), strsignal(),
57
strcmp(), strncmp() */
54
FD_CLOEXEC */
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,
67
65
SIG_UNBLOCK, kill(), sig_atomic_t
68
66
*/
69
67
#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
#include <fnmatch.h> /* fnmatch() */
68
#include <inttypes.h> /* intmax_t, SCNdMAX, PRIdMAX, */
76
69
77
70
#define BUFFER_SIZE 256
78
71
80
73
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
81
74
82
75
const char *argp_program_version = "plugin-runner " VERSION;
83
const char *argp_program_bug_address = "<mandos@recompile.se>";
76
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
84
77
85
78
typedef struct plugin{
86
79
char *name; /* can be NULL or any plugin name */
89
82
char **environ;
90
83
int envc;
91
84
bool disabled;
92
85
93
86
/* Variables used for running processes*/
94
87
pid_t pid;
95
88
int fd;
106
99
107
100
/* Gets an existing plugin based on name,
108
101
or if none is found, creates a new one */
109
__attribute__((warn_unused_result))
110
102
static plugin *getplugin(char *name){
111
/* Check for existing plugin with that name */
103
/* Check for exiting plugin with that name */
112
104
for(plugin *p = plugin_list; p != NULL; p = p->next){
113
105
if((p->name == name)
114
106
or (p->name and name and (strcmp(p->name, name) == 0))){
116
108
}
117
109
}
118
110
/* Create a new plugin */
119
plugin *new_plugin = NULL;
120
do {
121
new_plugin = malloc(sizeof(plugin));
122
} while(new_plugin == NULL and errno == EINTR);
111
plugin *new_plugin = malloc(sizeof(plugin));
123
112
if(new_plugin == NULL){
124
113
return NULL;
125
114
}
126
115
char *copy_name = NULL;
127
116
if(name != NULL){
128
do {
129
copy_name = strdup(name);
130
} while(copy_name == NULL and errno == EINTR);
117
copy_name = strdup(name);
131
118
if(copy_name == NULL){
132
int e = errno;
133
119
free(new_plugin);
134
errno = e;
135
120
return NULL;
136
121
}
137
122
}
141
126
.disabled = false,
142
127
.next = plugin_list };
143
128
144
do {
145
new_plugin->argv = malloc(sizeof(char *) * 2);
146
} while(new_plugin->argv == NULL and errno == EINTR);
129
new_plugin->argv = malloc(sizeof(char *) * 2);
147
130
if(new_plugin->argv == NULL){
148
int e = errno;
149
131
free(copy_name);
150
132
free(new_plugin);
151
errno = e;
152
133
return NULL;
153
134
}
154
135
new_plugin->argv[0] = copy_name;
155
136
new_plugin->argv[1] = NULL;
156
137
157
do {
158
new_plugin->environ = malloc(sizeof(char *));
159
} while(new_plugin->environ == NULL and errno == EINTR);
138
new_plugin->environ = malloc(sizeof(char *));
160
139
if(new_plugin->environ == NULL){
161
int e = errno;
162
140
free(copy_name);
163
141
free(new_plugin->argv);
164
142
free(new_plugin);
165
errno = e;
166
143
return NULL;
167
144
}
168
145
new_plugin->environ[0] = NULL;
173
150
}
174
151
175
152
/* Helper function for add_argument and add_environment */
176
__attribute__((nonnull, warn_unused_result))
177
153
static bool add_to_char_array(const char *new, char ***array,
178
154
int *len){
179
155
/* Resize the pointed-to array to hold one more pointer */
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);
156
*array = realloc(*array, sizeof(char *)
157
* (size_t) ((*len) + 2));
185
158
/* Malloc check */
186
if(new_array == NULL){
159
if(*array == NULL){
187
160
return false;
188
161
}
189
*array = new_array;
190
162
/* Make a copy of the new string */
191
char *copy;
192
do {
193
copy = strdup(new);
194
} while(copy == NULL and errno == EINTR);
163
char *copy = strdup(new);
195
164
if(copy == NULL){
196
165
return false;
197
166
}
204
173
}
205
174
206
175
/* Add to a plugin's argument vector */
207
__attribute__((nonnull(2), warn_unused_result))
208
176
static bool add_argument(plugin *p, const char *arg){
209
177
if(p == NULL){
210
178
return false;
213
181
}
214
182
215
183
/* Add to a plugin's environment */
216
__attribute__((nonnull(2), warn_unused_result))
217
184
static bool add_environment(plugin *p, const char *def, bool replace){
218
185
if(p == NULL){
219
186
return false;
221
188
/* namelen = length of name of environment variable */
222
189
size_t namelen = (size_t)(strchrnul(def, '=') - def);
223
190
/* Search for this environment variable */
224
for(char **envdef = p->environ; *envdef != NULL; envdef++){
225
if(strncmp(*envdef, def, namelen + 1) == 0){
191
for(char **e = p->environ; *e != NULL; e++){
192
if(strncmp(*e, def, namelen + 1) == 0){
226
193
/* It already exists */
227
194
if(replace){
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){
195
char *new = realloc(*e, strlen(def) + 1);
196
if(new == NULL){
233
197
return false;
234
198
}
235
*envdef = new_envdef;
236
strcpy(*envdef, def);
199
*e = new;
200
strcpy(*e, def);
237
201
}
238
202
return true;
239
203
}
244
208
/*
245
209
* Based on the example in the GNU LibC manual chapter 13.13 "File
246
210
* Descriptor Flags".
247
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
211
* *Note File Descriptor Flags:(libc)Descriptor Flags.
248
212
*/
249
__attribute__((warn_unused_result))
250
213
static int set_cloexec_flag(int fd){
251
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
214
int ret = fcntl(fd, F_GETFD, 0);
252
215
/* If reading the flags failed, return error indication now. */
253
216
if(ret < 0){
254
217
return ret;
255
218
}
256
219
/* Store modified flag word in the descriptor. */
257
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
258
ret | FD_CLOEXEC));
220
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
259
221
}
260
222
261
223
276
238
/* No child processes */
277
239
break;
278
240
}
279
error(0, errno, "waitpid");
241
perror("waitpid");
280
242
}
281
243
282
244
/* A child exited, find it in process_list */
294
256
}
295
257
296
258
/* Prints out a password to stdout */
297
__attribute__((nonnull, warn_unused_result))
298
259
static bool print_out_password(const char *buffer, size_t length){
299
260
ssize_t ret;
300
261
for(size_t written = 0; written < length; written += (size_t)ret){
308
269
}
309
270
310
271
/* Removes and free a plugin from the plugin list */
311
__attribute__((nonnull))
312
272
static void free_plugin(plugin *plugin_node){
313
273
314
274
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
320
280
}
321
281
free(plugin_node->environ);
322
282
free(plugin_node->buffer);
323
283
324
284
/* Removes the plugin from the singly-linked list */
325
285
if(plugin_node == plugin_list){
326
286
/* First one - simple */
348
308
char *plugindir = NULL;
349
309
char *argfile = NULL;
350
310
FILE *conffp;
311
size_t d_name_len;
351
312
DIR *dir = NULL;
352
313
struct dirent *dirst;
353
314
struct stat st;
354
315
fd_set rfds_all;
355
int ret, maxfd = 0;
316
int ret, numchars, maxfd = 0;
356
317
ssize_t sret;
318
intmax_t tmpmax;
357
319
uid_t uid = 65534;
358
320
gid_t gid = 65534;
359
321
bool debug = false;
363
325
.sa_flags = SA_NOCLDSTOP };
364
326
char **custom_argv = NULL;
365
327
int custom_argc = 0;
366
int dir_fd;
367
328
368
329
/* Establish a signal handler */
369
330
sigemptyset(&sigchld_action.sa_mask);
370
331
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
371
332
if(ret == -1){
372
error(0, errno, "sigaddset");
373
exitstatus = EX_OSERR;
333
perror("sigaddset");
334
exitstatus = EXIT_FAILURE;
374
335
goto fallback;
375
336
}
376
337
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
377
338
if(ret == -1){
378
error(0, errno, "sigaction");
379
exitstatus = EX_OSERR;
339
perror("sigaction");
340
exitstatus = EXIT_FAILURE;
380
341
goto fallback;
381
342
}
382
343
414
375
.doc = "Group ID the plugins will run as", .group = 3 },
415
376
{ .name = "debug", .key = 132,
416
377
.doc = "Debug mode", .group = 4 },
417
/*
418
* These reproduce what we would get without ARGP_NO_HELP
419
*/
420
{ .name = "help", .key = '?',
421
.doc = "Give this help list", .group = -1 },
422
{ .name = "usage", .key = -3,
423
.doc = "Give a short usage message", .group = -1 },
424
{ .name = "version", .key = 'V',
425
.doc = "Print program version", .group = -1 },
426
378
{ .name = NULL }
427
379
};
428
380
429
__attribute__((nonnull(3)))
430
error_t parse_opt(int key, char *arg, struct argp_state *state){
431
errno = 0;
381
error_t parse_opt(int key, char *arg, __attribute__((unused))
382
struct argp_state *state){
432
383
switch(key){
433
char *tmp;
434
intmax_t tmp_id;
435
384
case 'g': /* --global-options */
436
{
385
if(arg != NULL){
437
386
char *plugin_option;
438
387
while((plugin_option = strsep(&arg, ",")) != NULL){
388
if(plugin_option[0] == '\0'){
389
continue;
390
}
439
391
if(not add_argument(getplugin(NULL), plugin_option)){
440
break;
392
perror("add_argument");
393
return ARGP_ERR_UNKNOWN;
441
394
}
442
395
}
443
errno = 0;
444
396
}
445
397
break;
446
398
case 'G': /* --global-env */
447
if(add_environment(getplugin(NULL), arg, true)){
448
errno = 0;
399
if(arg == NULL){
400
break;
401
}
402
if(not add_environment(getplugin(NULL), arg, true)){
403
perror("add_environment");
449
404
}
450
405
break;
451
406
case 'o': /* --options-for */
452
{
453
char *option_list = strchr(arg, ':');
454
if(option_list == NULL){
455
argp_error(state, "No colon in \"%s\"", arg);
456
errno = EINVAL;
457
break;
458
}
459
*option_list = '\0';
460
option_list++;
461
if(arg[0] == '\0'){
462
argp_error(state, "Empty plugin name");
463
errno = EINVAL;
464
break;
465
}
466
char *option;
467
while((option = strsep(&option_list, ",")) != NULL){
468
if(not add_argument(getplugin(arg), option)){
469
break;
407
if(arg != NULL){
408
char *plugin_name = strsep(&arg, ":");
409
if(plugin_name[0] == '\0'){
410
break;
411
}
412
char *plugin_option;
413
while((plugin_option = strsep(&arg, ",")) != NULL){
414
if(not add_argument(getplugin(plugin_name), plugin_option)){
415
perror("add_argument");
416
return ARGP_ERR_UNKNOWN;
470
417
}
471
418
}
472
errno = 0;
473
419
}
474
420
break;
475
421
case 'E': /* --env-for */
422
if(arg == NULL){
423
break;
424
}
476
425
{
477
426
char *envdef = strchr(arg, ':');
478
427
if(envdef == NULL){
479
argp_error(state, "No colon in \"%s\"", arg);
480
errno = EINVAL;
481
428
break;
482
429
}
483
430
*envdef = '\0';
484
envdef++;
485
if(arg[0] == '\0'){
486
argp_error(state, "Empty plugin name");
487
errno = EINVAL;
488
break;
489
}
490
if(add_environment(getplugin(arg), envdef, true)){
491
errno = 0;
431
if(not add_environment(getplugin(arg), envdef+1, true)){
432
perror("add_environment");
492
433
}
493
434
}
494
435
break;
495
436
case 'd': /* --disable */
496
{
437
if(arg != NULL){
497
438
plugin *p = getplugin(arg);
498
if(p != NULL){
499
p->disabled = true;
500
errno = 0;
439
if(p == NULL){
440
return ARGP_ERR_UNKNOWN;
501
441
}
442
p->disabled = true;
502
443
}
503
444
break;
504
445
case 'e': /* --enable */
505
{
446
if(arg != NULL){
506
447
plugin *p = getplugin(arg);
507
if(p != NULL){
508
p->disabled = false;
509
errno = 0;
448
if(p == NULL){
449
return ARGP_ERR_UNKNOWN;
510
450
}
451
p->disabled = false;
511
452
}
512
453
break;
513
454
case 128: /* --plugin-dir */
514
455
free(plugindir);
515
456
plugindir = strdup(arg);
516
if(plugindir != NULL){
517
errno = 0;
518
}
457
if(plugindir == NULL){
458
perror("strdup");
459
}
519
460
break;
520
461
case 129: /* --config-file */
521
462
/* This is already done by parse_opt_config_file() */
522
463
break;
523
464
case 130: /* --userid */
524
tmp_id = strtoimax(arg, &tmp, 10);
525
if(errno != 0 or tmp == arg or *tmp != '\0'
526
or tmp_id != (uid_t)tmp_id){
527
argp_error(state, "Bad user ID number: \"%s\", using %"
528
PRIdMAX, arg, (intmax_t)uid);
529
break;
465
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
466
if(ret < 1 or tmpmax != (uid_t)tmpmax
467
or arg[numchars] != '\0'){
468
fprintf(stderr, "Bad user ID number: \"%s\", using %"
469
PRIdMAX "\n", arg, (intmax_t)uid);
470
} else {
471
uid = (uid_t)tmpmax;
530
472
}
531
uid = (uid_t)tmp_id;
532
errno = 0;
533
473
break;
534
474
case 131: /* --groupid */
535
tmp_id = strtoimax(arg, &tmp, 10);
536
if(errno != 0 or tmp == arg or *tmp != '\0'
537
or tmp_id != (gid_t)tmp_id){
538
argp_error(state, "Bad group ID number: \"%s\", using %"
539
PRIdMAX, arg, (intmax_t)gid);
540
break;
475
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
476
if(ret < 1 or tmpmax != (gid_t)tmpmax
477
or arg[numchars] != '\0'){
478
fprintf(stderr, "Bad group ID number: \"%s\", using %"
479
PRIdMAX "\n", arg, (intmax_t)gid);
480
} else {
481
gid = (gid_t)tmpmax;
541
482
}
542
gid = (gid_t)tmp_id;
543
errno = 0;
544
483
break;
545
484
case 132: /* --debug */
546
485
debug = true;
547
486
break;
548
/*
549
* These reproduce what we would get without ARGP_NO_HELP
550
*/
551
case '?': /* --help */
552
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
553
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
554
case -3: /* --usage */
555
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
556
argp_state_help(state, state->out_stream,
557
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
558
case 'V': /* --version */
559
fprintf(state->out_stream, "%s\n", argp_program_version);
560
exit(EXIT_SUCCESS);
561
break;
562
487
/*
563
488
* When adding more options before this line, remember to also add a
564
489
* "case" to the "parse_opt_config_file" function below.
567
492
/* Cryptsetup always passes an argument, which is an empty
568
493
string if "none" was specified in /etc/crypttab. So if
569
494
argument was empty, we ignore it silently. */
570
if(arg[0] == '\0'){
571
break;
495
if(arg[0] != '\0'){
496
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
572
497
}
498
break;
499
case ARGP_KEY_END:
500
break;
573
501
default:
574
502
return ARGP_ERR_UNKNOWN;
575
503
}
576
return errno; /* Set to 0 at start */
504
return 0;
577
505
}
578
506
579
507
/* This option parser is the same as parse_opt() above, except it
581
509
error_t parse_opt_config_file(int key, char *arg,
582
510
__attribute__((unused))
583
511
struct argp_state *state){
584
errno = 0;
585
512
switch(key){
586
513
case 'g': /* --global-options */
587
514
case 'G': /* --global-env */
594
521
case 129: /* --config-file */
595
522
free(argfile);
596
523
argfile = strdup(arg);
597
if(argfile != NULL){
598
errno = 0;
524
if(argfile == NULL){
525
perror("strdup");
599
526
}
600
break;
527
break;
601
528
case 130: /* --userid */
602
529
case 131: /* --groupid */
603
530
case 132: /* --debug */
604
case '?': /* --help */
605
case -3: /* --usage */
606
case 'V': /* --version */
607
531
case ARGP_KEY_ARG:
532
case ARGP_KEY_END:
608
533
break;
609
534
default:
610
535
return ARGP_ERR_UNKNOWN;
611
536
}
612
return errno;
537
return 0;
613
538
}
614
539
615
540
struct argp argp = { .options = options,
619
544
620
545
/* Parse using parse_opt_config_file() in order to get the custom
621
546
config file location, if any. */
622
ret = argp_parse(&argp, argc, argv,
623
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
624
NULL, NULL);
625
switch(ret){
626
case 0:
627
break;
628
case ENOMEM:
629
default:
630
errno = ret;
631
error(0, errno, "argp_parse");
632
exitstatus = EX_OSERR;
633
goto fallback;
634
case EINVAL:
635
exitstatus = EX_USAGE;
547
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
548
if(ret == ARGP_ERR_UNKNOWN){
549
fprintf(stderr, "Unknown error while parsing arguments\n");
550
exitstatus = EXIT_FAILURE;
636
551
goto fallback;
637
552
}
638
553
644
559
conffp = fopen(AFILE, "r");
645
560
} else {
646
561
conffp = fopen(argfile, "r");
647
}
562
}
648
563
if(conffp != NULL){
649
564
char *org_line = NULL;
650
565
char *p, *arg, *new_arg, *line;
651
566
size_t size = 0;
652
567
const char whitespace_delims[] = " \r\t\f\v\n";
653
568
const char comment_delim[] = "#";
654
569
655
570
custom_argc = 1;
656
571
custom_argv = malloc(sizeof(char*) * 2);
657
572
if(custom_argv == NULL){
658
error(0, errno, "malloc");
659
exitstatus = EX_OSERR;
573
perror("malloc");
574
exitstatus = EXIT_FAILURE;
660
575
goto fallback;
661
576
}
662
577
custom_argv[0] = argv[0];
663
578
custom_argv[1] = NULL;
664
579
665
580
/* for each line in the config file, strip whitespace and ignore
666
581
commented text */
667
582
while(true){
669
584
if(sret == -1){
670
585
break;
671
586
}
672
587
673
588
line = org_line;
674
589
arg = strsep(&line, comment_delim);
675
590
while((p = strsep(&arg, whitespace_delims)) != NULL){
678
593
}
679
594
new_arg = strdup(p);
680
595
if(new_arg == NULL){
681
error(0, errno, "strdup");
682
exitstatus = EX_OSERR;
596
perror("strdup");
597
exitstatus = EXIT_FAILURE;
683
598
free(org_line);
684
599
goto fallback;
685
600
}
686
601
687
602
custom_argc += 1;
688
{
689
char **new_argv = realloc(custom_argv, sizeof(char *)
690
* ((unsigned int)
691
custom_argc + 1));
692
if(new_argv == NULL){
693
error(0, errno, "realloc");
694
exitstatus = EX_OSERR;
695
free(new_arg);
696
free(org_line);
697
goto fallback;
698
} else {
699
custom_argv = new_argv;
700
}
603
custom_argv = realloc(custom_argv, sizeof(char *)
604
* ((unsigned int) custom_argc + 1));
605
if(custom_argv == NULL){
606
perror("realloc");
607
exitstatus = EXIT_FAILURE;
608
free(org_line);
609
goto fallback;
701
610
}
702
611
custom_argv[custom_argc-1] = new_arg;
703
custom_argv[custom_argc] = NULL;
612
custom_argv[custom_argc] = NULL;
704
613
}
705
614
}
706
do {
707
ret = fclose(conffp);
708
} while(ret == EOF and errno == EINTR);
709
if(ret == EOF){
710
error(0, errno, "fclose");
711
exitstatus = EX_IOERR;
712
goto fallback;
713
}
714
615
free(org_line);
715
616
} else {
716
617
/* Check for harmful errors and go to fallback. Other errors might
717
618
not affect opening plugins */
718
619
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
719
error(0, errno, "fopen");
720
exitstatus = EX_OSERR;
620
perror("fopen");
621
exitstatus = EXIT_FAILURE;
721
622
goto fallback;
722
623
}
723
624
}
724
/* If there were any arguments from the configuration file, pass
725
them to parser as command line arguments */
625
/* If there was any arguments from configuration file,
626
pass them to parser as command arguments */
726
627
if(custom_argv != NULL){
727
ret = argp_parse(&argp, custom_argc, custom_argv,
728
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
729
NULL, NULL);
730
switch(ret){
731
case 0:
732
break;
733
case ENOMEM:
734
default:
735
errno = ret;
736
error(0, errno, "argp_parse");
737
exitstatus = EX_OSERR;
738
goto fallback;
739
case EINVAL:
740
exitstatus = EX_CONFIG;
628
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
629
0, NULL);
630
if(ret == ARGP_ERR_UNKNOWN){
631
fprintf(stderr, "Unknown error while parsing arguments\n");
632
exitstatus = EXIT_FAILURE;
741
633
goto fallback;
742
634
}
743
635
}
744
636
745
637
/* Parse actual command line arguments, to let them override the
746
638
config file */
747
ret = argp_parse(&argp, argc, argv,
748
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
749
NULL, NULL);
750
switch(ret){
751
case 0:
752
break;
753
case ENOMEM:
754
default:
755
errno = ret;
756
error(0, errno, "argp_parse");
757
exitstatus = EX_OSERR;
758
goto fallback;
759
case EINVAL:
760
exitstatus = EX_USAGE;
639
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
640
if(ret == ARGP_ERR_UNKNOWN){
641
fprintf(stderr, "Unknown error while parsing arguments\n");
642
exitstatus = EXIT_FAILURE;
761
643
goto fallback;
762
644
}
763
645
775
657
}
776
658
}
777
659
778
if(getuid() == 0){
779
/* Work around Debian bug #633582:
780
<http://bugs.debian.org/633582> */
781
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
782
if(plugindir_fd == -1){
783
if(errno != ENOENT){
784
error(0, errno, "open(\"" PDIR "\")");
785
}
786
} else {
787
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
788
if(ret == -1){
789
error(0, errno, "fstat");
790
} else {
791
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
792
ret = fchown(plugindir_fd, uid, gid);
793
if(ret == -1){
794
error(0, errno, "fchown");
795
}
796
}
797
}
798
TEMP_FAILURE_RETRY(close(plugindir_fd));
799
}
800
}
801
802
/* Lower permissions */
803
ret = setgid(gid);
660
/* Strip permissions down to nobody */
661
setgid(gid);
804
662
if(ret == -1){
805
error(0, errno, "setgid");
663
perror("setgid");
806
664
}
807
665
ret = setuid(uid);
808
666
if(ret == -1){
809
error(0, errno, "setuid");
810
}
811
812
/* Open plugin directory with close_on_exec flag */
667
perror("setuid");
668
}
669
670
if(plugindir == NULL){
671
dir = opendir(PDIR);
672
} else {
673
dir = opendir(plugindir);
674
}
675
676
if(dir == NULL){
677
perror("Could not open plugin dir");
678
exitstatus = EXIT_FAILURE;
679
goto fallback;
680
}
681
682
/* Set the FD_CLOEXEC flag on the directory, if possible */
813
683
{
814
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
815
#ifdef O_CLOEXEC
816
O_CLOEXEC
817
#else /* not O_CLOEXEC */
818
0
819
#endif /* not O_CLOEXEC */
820
);
821
if(dir_fd == -1){
822
error(0, errno, "Could not open plugin dir");
823
exitstatus = EX_UNAVAILABLE;
824
goto fallback;
825
}
826
827
#ifndef O_CLOEXEC
828
/* Set the FD_CLOEXEC flag on the directory */
829
ret = set_cloexec_flag(dir_fd);
830
if(ret < 0){
831
error(0, errno, "set_cloexec_flag");
832
TEMP_FAILURE_RETRY(close(dir_fd));
833
exitstatus = EX_OSERR;
834
goto fallback;
835
}
836
#endif /* O_CLOEXEC */
837
838
dir = fdopendir(dir_fd);
839
if(dir == NULL){
840
error(0, errno, "Could not open plugin dir");
841
TEMP_FAILURE_RETRY(close(dir_fd));
842
exitstatus = EX_OSERR;
843
goto fallback;
684
int dir_fd = dirfd(dir);
685
if(dir_fd >= 0){
686
ret = set_cloexec_flag(dir_fd);
687
if(ret < 0){
688
perror("set_cloexec_flag");
689
exitstatus = EXIT_FAILURE;
690
goto fallback;
691
}
844
692
}
845
693
}
846
694
848
696
849
697
/* Read and execute any executable in the plugin directory*/
850
698
while(true){
851
do {
852
dirst = readdir(dir);
853
} while(dirst == NULL and errno == EINTR);
699
dirst = readdir(dir);
854
700
855
701
/* All directory entries have been processed */
856
702
if(dirst == NULL){
857
703
if(errno == EBADF){
858
error(0, errno, "readdir");
859
exitstatus = EX_IOERR;
704
perror("readdir");
705
exitstatus = EXIT_FAILURE;
860
706
goto fallback;
861
707
}
862
708
break;
863
709
}
864
710
711
d_name_len = strlen(dirst->d_name);
712
865
713
/* Ignore dotfiles, backup files and other junk */
866
714
{
867
715
bool bad_name = false;
868
const char * const patterns[] = { ".*", "#*#", "*~",
869
"*.dpkg-new", "*.dpkg-old",
870
"*.dpkg-bak", "*.dpkg-divert",
871
NULL };
872
#ifdef __GNUC__
873
#pragma GCC diagnostic push
874
#pragma GCC diagnostic ignored "-Wcast-qual"
875
#endif
876
for(const char **pat = (const char **)patterns;
877
*pat != NULL; pat++){
878
#ifdef __GNUC__
879
#pragma GCC diagnostic pop
880
#endif
881
if(fnmatch(*pat, dirst->d_name,
882
FNM_FILE_NAME | FNM_PERIOD) != FNM_NOMATCH){
883
if(debug){
884
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
885
" matching pattern %s\n", dirst->d_name, *pat);
886
}
887
bad_name = true;
888
break;
889
}
890
}
891
if(bad_name){
892
continue;
893
}
894
}
895
896
int plugin_fd = openat(dir_fd, dirst->d_name, O_RDONLY |
897
#ifdef O_CLOEXEC
898
O_CLOEXEC
899
#else /* not O_CLOEXEC */
900
0
901
#endif /* not O_CLOEXEC */
902
);
903
if(plugin_fd == -1){
904
error(0, errno, "Could not open plugin");
905
continue;
906
}
907
#ifndef O_CLOEXEC
908
/* Set the FD_CLOEXEC flag on the plugin FD */
909
ret = set_cloexec_flag(plugin_fd);
716
717
const char const *bad_prefixes[] = { ".", "#", NULL };
718
719
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
720
".dpkg-old",
721
".dpkg-bak",
722
".dpkg-divert", NULL };
723
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
724
size_t pre_len = strlen(*pre);
725
if((d_name_len >= pre_len)
726
and strncmp((dirst->d_name), *pre, pre_len) == 0){
727
if(debug){
728
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
729
" with bad prefix %s\n", dirst->d_name, *pre);
730
}
731
bad_name = true;
732
break;
733
}
734
}
735
if(bad_name){
736
continue;
737
}
738
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
739
size_t suf_len = strlen(*suf);
740
if((d_name_len >= suf_len)
741
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
742
== 0)){
743
if(debug){
744
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
745
" with bad suffix %s\n", dirst->d_name, *suf);
746
}
747
bad_name = true;
748
break;
749
}
750
}
751
752
if(bad_name){
753
continue;
754
}
755
}
756
757
char *filename;
758
if(plugindir == NULL){
759
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
760
} else {
761
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
762
}
910
763
if(ret < 0){
911
error(0, errno, "set_cloexec_flag");
912
TEMP_FAILURE_RETRY(close(plugin_fd));
764
perror("asprintf");
913
765
continue;
914
766
}
915
#endif /* O_CLOEXEC */
916
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
767
768
ret = stat(filename, &st);
917
769
if(ret == -1){
918
error(0, errno, "stat");
919
TEMP_FAILURE_RETRY(close(plugin_fd));
770
perror("stat");
771
free(filename);
920
772
continue;
921
773
}
922
774
923
775
/* Ignore non-executable files */
924
if(not S_ISREG(st.st_mode)
925
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, dirst->d_name, X_OK,
926
0)) != 0)){
776
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
927
777
if(debug){
928
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
929
" with bad type or mode\n",
930
plugindir != NULL ? plugindir : PDIR, dirst->d_name);
778
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
779
" with bad type or mode\n", filename);
931
780
}
932
TEMP_FAILURE_RETRY(close(plugin_fd));
781
free(filename);
933
782
continue;
934
783
}
935
784
936
785
plugin *p = getplugin(dirst->d_name);
937
786
if(p == NULL){
938
error(0, errno, "getplugin");
939
TEMP_FAILURE_RETRY(close(plugin_fd));
787
perror("getplugin");
788
free(filename);
940
789
continue;
941
790
}
942
791
if(p->disabled){
944
793
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
945
794
dirst->d_name);
946
795
}
947
TEMP_FAILURE_RETRY(close(plugin_fd));
796
free(filename);
948
797
continue;
949
798
}
950
799
{
953
802
if(g != NULL){
954
803
for(char **a = g->argv + 1; *a != NULL; a++){
955
804
if(not add_argument(p, *a)){
956
error(0, errno, "add_argument");
805
perror("add_argument");
957
806
}
958
807
}
959
808
/* Add global environment variables */
960
809
for(char **e = g->environ; *e != NULL; e++){
961
810
if(not add_environment(p, *e, false)){
962
error(0, errno, "add_environment");
811
perror("add_environment");
963
812
}
964
813
}
965
814
}
966
815
}
967
/* If this plugin has any environment variables, we need to
968
duplicate the environment from this process, too. */
816
/* If this plugin has any environment variables, we will call
817
using execve and need to duplicate the environment from this
818
process, too. */
969
819
if(p->environ[0] != NULL){
970
820
for(char **e = environ; *e != NULL; e++){
971
821
if(not add_environment(p, *e, false)){
972
error(0, errno, "add_environment");
822
perror("add_environment");
973
823
}
974
824
}
975
825
}
976
826
977
827
int pipefd[2];
978
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
828
ret = pipe(pipefd);
979
829
if(ret == -1){
980
error(0, errno, "pipe");
981
exitstatus = EX_OSERR;
830
perror("pipe");
831
exitstatus = EXIT_FAILURE;
982
832
goto fallback;
983
833
}
984
834
/* Ask OS to automatic close the pipe on exec */
985
835
ret = set_cloexec_flag(pipefd[0]);
986
836
if(ret < 0){
987
error(0, errno, "set_cloexec_flag");
988
exitstatus = EX_OSERR;
837
perror("set_cloexec_flag");
838
exitstatus = EXIT_FAILURE;
989
839
goto fallback;
990
840
}
991
841
ret = set_cloexec_flag(pipefd[1]);
992
842
if(ret < 0){
993
error(0, errno, "set_cloexec_flag");
994
exitstatus = EX_OSERR;
843
perror("set_cloexec_flag");
844
exitstatus = EXIT_FAILURE;
995
845
goto fallback;
996
846
}
997
847
/* Block SIGCHLD until process is safely in process list */
998
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
999
&sigchld_action.sa_mask,
1000
NULL));
848
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1001
849
if(ret < 0){
1002
error(0, errno, "sigprocmask");
1003
exitstatus = EX_OSERR;
850
perror("sigprocmask");
851
exitstatus = EXIT_FAILURE;
1004
852
goto fallback;
1005
853
}
1006
854
/* Starting a new process to be watched */
1007
pid_t pid;
1008
do {
1009
pid = fork();
1010
} while(pid == -1 and errno == EINTR);
855
pid_t pid = fork();
1011
856
if(pid == -1){
1012
error(0, errno, "fork");
1013
exitstatus = EX_OSERR;
857
perror("fork");
858
exitstatus = EXIT_FAILURE;
1014
859
goto fallback;
1015
860
}
1016
861
if(pid == 0){
1017
862
/* this is the child process */
1018
863
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1019
864
if(ret < 0){
1020
error(0, errno, "sigaction");
1021
_exit(EX_OSERR);
865
perror("sigaction");
866
_exit(EXIT_FAILURE);
1022
867
}
1023
868
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1024
869
if(ret < 0){
1025
error(0, errno, "sigprocmask");
1026
_exit(EX_OSERR);
870
perror("sigprocmask");
871
_exit(EXIT_FAILURE);
1027
872
}
1028
873
1029
874
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1030
875
if(ret == -1){
1031
error(0, errno, "dup2");
1032
_exit(EX_OSERR);
876
perror("dup2");
877
_exit(EXIT_FAILURE);
1033
878
}
1034
879
1035
880
if(dirfd(dir) < 0){
1037
882
above and must now close it manually here. */
1038
883
closedir(dir);
1039
884
}
1040
if(fexecve(plugin_fd, p->argv,
1041
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1042
error(0, errno, "fexecve for %s/%s",
1043
plugindir != NULL ? plugindir : PDIR, dirst->d_name);
1044
_exit(EX_OSERR);
885
if(p->environ[0] == NULL){
886
if(execv(filename, p->argv) < 0){
887
perror("execv");
888
_exit(EXIT_FAILURE);
889
}
890
} else {
891
if(execve(filename, p->argv, p->environ) < 0){
892
perror("execve");
893
_exit(EXIT_FAILURE);
894
}
1045
895
}
1046
896
/* no return */
1047
897
}
1048
898
/* Parent process */
1049
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1050
pipe */
1051
TEMP_FAILURE_RETRY(close(plugin_fd));
899
close(pipefd[1]); /* Close unused write end of pipe */
900
free(filename);
1052
901
plugin *new_plugin = getplugin(dirst->d_name);
1053
902
if(new_plugin == NULL){
1054
error(0, errno, "getplugin");
1055
ret = (int)(TEMP_FAILURE_RETRY
1056
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1057
NULL)));
903
perror("getplugin");
904
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1058
905
if(ret < 0){
1059
error(0, errno, "sigprocmask");
906
perror("sigprocmask");
1060
907
}
1061
exitstatus = EX_OSERR;
908
exitstatus = EXIT_FAILURE;
1062
909
goto fallback;
1063
910
}
1064
911
1067
914
1068
915
/* Unblock SIGCHLD so signal handler can be run if this process
1069
916
has already completed */
1070
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1071
&sigchld_action.sa_mask,
1072
NULL));
917
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1073
918
if(ret < 0){
1074
error(0, errno, "sigprocmask");
1075
exitstatus = EX_OSERR;
919
perror("sigprocmask");
920
exitstatus = EXIT_FAILURE;
1076
921
goto fallback;
1077
922
}
1078
923
1079
#if defined (__GNUC__) and defined (__GLIBC__)
1080
#if not __GLIBC_PREREQ(2, 16)
1081
#pragma GCC diagnostic push
1082
#pragma GCC diagnostic ignored "-Wsign-conversion"
1083
#endif
1084
#endif
1085
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1086
-Wconversion in GNU libc
1087
before 2.16 */
1088
#if defined (__GNUC__) and defined (__GLIBC__)
1089
#if not __GLIBC_PREREQ(2, 16)
1090
#pragma GCC diagnostic pop
1091
#endif
1092
#endif
924
FD_SET(new_plugin->fd, &rfds_all);
1093
925
1094
926
if(maxfd < new_plugin->fd){
1095
927
maxfd = new_plugin->fd;
1096
928
}
1097
929
}
1098
930
1099
TEMP_FAILURE_RETRY(closedir(dir));
931
closedir(dir);
1100
932
dir = NULL;
1101
933
free_plugin(getplugin(NULL));
1102
934
1115
947
while(plugin_list){
1116
948
fd_set rfds = rfds_all;
1117
949
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1118
if(select_ret == -1 and errno != EINTR){
1119
error(0, errno, "select");
1120
exitstatus = EX_OSERR;
950
if(select_ret == -1){
951
perror("select");
952
exitstatus = EXIT_FAILURE;
1121
953
goto fallback;
1122
954
}
1123
955
/* OK, now either a process completed, or something can be read
1129
961
if(not WIFEXITED(proc->status)
1130
962
or WEXITSTATUS(proc->status) != 0){
1131
963
/* Bad exit by plugin */
1132
964
1133
965
if(debug){
1134
966
if(WIFEXITED(proc->status)){
1135
967
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1138
970
WEXITSTATUS(proc->status));
1139
971
} else if(WIFSIGNALED(proc->status)){
1140
972
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1141
" signal %d: %s\n", proc->name,
973
" signal %d\n", proc->name,
1142
974
(intmax_t) (proc->pid),
1143
WTERMSIG(proc->status),
1144
strsignal(WTERMSIG(proc->status)));
975
WTERMSIG(proc->status));
1145
976
} else if(WCOREDUMP(proc->status)){
1146
977
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1147
978
" core\n", proc->name, (intmax_t) (proc->pid));
1149
980
}
1150
981
1151
982
/* Remove the plugin */
1152
#if defined (__GNUC__) and defined (__GLIBC__)
1153
#if not __GLIBC_PREREQ(2, 16)
1154
#pragma GCC diagnostic push
1155
#pragma GCC diagnostic ignored "-Wsign-conversion"
1156
#endif
1157
#endif
1158
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1159
-Wconversion in GNU libc
1160
before 2.16 */
1161
#if defined (__GNUC__) and defined (__GLIBC__)
1162
#if not __GLIBC_PREREQ(2, 16)
1163
#pragma GCC diagnostic pop
1164
#endif
1165
#endif
1166
983
FD_CLR(proc->fd, &rfds_all);
984
1167
985
/* Block signal while modifying process_list */
1168
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1169
(SIG_BLOCK,
1170
&sigchld_action.sa_mask,
1171
NULL));
986
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1172
987
if(ret < 0){
1173
error(0, errno, "sigprocmask");
1174
exitstatus = EX_OSERR;
988
perror("sigprocmask");
989
exitstatus = EXIT_FAILURE;
1175
990
goto fallback;
1176
991
}
1177
992
1180
995
proc = next_plugin;
1181
996
1182
997
/* We are done modifying process list, so unblock signal */
1183
ret = (int)(TEMP_FAILURE_RETRY
1184
(sigprocmask(SIG_UNBLOCK,
1185
&sigchld_action.sa_mask, NULL)));
998
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
999
NULL);
1186
1000
if(ret < 0){
1187
error(0, errno, "sigprocmask");
1188
exitstatus = EX_OSERR;
1001
perror("sigprocmask");
1002
exitstatus = EXIT_FAILURE;
1189
1003
goto fallback;
1190
1004
}
1191
1005
1201
1015
bool bret = print_out_password(proc->buffer,
1202
1016
proc->buffer_length);
1203
1017
if(not bret){
1204
error(0, errno, "print_out_password");
1205
exitstatus = EX_IOERR;
1018
perror("print_out_password");
1019
exitstatus = EXIT_FAILURE;
1206
1020
}
1207
1021
goto fallback;
1208
1022
}
1209
1023
1210
1024
/* This process has not completed. Does it have any output? */
1211
#if defined (__GNUC__) and defined (__GLIBC__)
1212
#if not __GLIBC_PREREQ(2, 16)
1213
#pragma GCC diagnostic push
1214
#pragma GCC diagnostic ignored "-Wsign-conversion"
1215
#endif
1216
#endif
1217
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1218
warning from
1219
-Wconversion
1220
in GNU libc
1221
before
1222
2.16 */
1223
#if defined (__GNUC__) and defined (__GLIBC__)
1224
#if not __GLIBC_PREREQ(2, 16)
1225
#pragma GCC diagnostic pop
1226
#endif
1227
#endif
1025
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1228
1026
/* This process had nothing to say at this time */
1229
1027
proc = proc->next;
1230
1028
continue;
1231
1029
}
1232
1030
/* Before reading, make the process' data buffer large enough */
1233
1031
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1234
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1235
+ (size_t) BUFFER_SIZE);
1236
if(new_buffer == NULL){
1237
error(0, errno, "malloc");
1238
exitstatus = EX_OSERR;
1032
proc->buffer = realloc(proc->buffer, proc->buffer_size
1033
+ (size_t) BUFFER_SIZE);
1034
if(proc->buffer == NULL){
1035
perror("malloc");
1036
exitstatus = EXIT_FAILURE;
1239
1037
goto fallback;
1240
1038
}
1241
proc->buffer = new_buffer;
1242
1039
proc->buffer_size += BUFFER_SIZE;
1243
1040
}
1244
1041
/* Read from the process */
1245
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1246
proc->buffer
1247
+ proc->buffer_length,
1248
BUFFER_SIZE));
1042
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1043
BUFFER_SIZE);
1249
1044
if(sret < 0){
1250
1045
/* Read error from this process; ignore the error */
1251
1046
proc = proc->next;
1259
1054
}
1260
1055
}
1261
1056
}
1262
1263
1057
1058
1264
1059
fallback:
1265
1060
1266
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1267
and exitstatus != EX_OK)){
1061
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1268
1062
/* Fallback if all plugins failed, none are found or an error
1269
1063
occured */
1270
1064
bool bret;
1278
1072
}
1279
1073
bret = print_out_password(passwordbuffer, len);
1280
1074
if(not bret){
1281
error(0, errno, "print_out_password");
1282
exitstatus = EX_IOERR;
1075
perror("print_out_password");
1076
exitstatus = EXIT_FAILURE;
1283
1077
}
1284
1078
}
1285
1079
1286
1080
/* Restore old signal handler */
1287
1081
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1288
1082
if(ret == -1){
1289
error(0, errno, "sigaction");
1290
exitstatus = EX_OSERR;
1083
perror("sigaction");
1084
exitstatus = EXIT_FAILURE;
1291
1085
}
1292
1086
1293
1087
if(custom_argv != NULL){
1308
1102
ret = kill(p->pid, SIGTERM);
1309
1103
if(ret == -1 and errno != ESRCH){
1310
1104
/* Set-uid proccesses might not get closed */
1311
error(0, errno, "kill");
1105
perror("kill");
1312
1106
}
1313
1107
}
1314
1108
}
1315
1109
1316
1110
/* Wait for any remaining child processes to terminate */
1317
do {
1111
do{
1318
1112
ret = wait(NULL);
1319
1113
} while(ret >= 0);
1320
1114
if(errno != ECHILD){
1321
error(0, errno, "wait");
1115
perror("wait");
1322
1116
}
1323
1117
1324
1118
free_plugin_list();
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0