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- Committer: Teddy Hogeborn
- Date: 2009-02-12 06:09:24 UTC
- mto: (237.4.2 mandos-pipe-ipc) (24.1.137 mandos) (299.1.1 release) (300.1.1 release) (301.1.1 release)
- mto: This revision was merged to the branch mainline in revision 250.
- Revision ID: teddy@fukt.bsnet.se-20090212060924-vwxgitxnwr14w9e4
* mandos (Client.start_checker): Bug fix: Add extra check in case the
checker process completed quickly.
checker process completed quickly.
- files removed:
- DBUS-API
- debian/source
- debian/upstream
- network-hooks.d
- plugin-helpers
- 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 © 2008-2016 Teddy Hogeborn
6
* Copyright © 2008-2016 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, pipe2() */
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> /* fstat(), struct stat, waitpid(),
34
WIFEXITED(), WEXITSTATUS(), wait(),
35
pid_t, uid_t, gid_t, getuid(),
36
getgid() */
31
#include <stdio.h> /* perror, fileno(), fprintf(),
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, opendir(), stat(), struct
34
stat, waitpid(), WIFEXITED(),
35
WEXITSTATUS(), wait(), pid_t,
36
uid_t, gid_t, getuid(), getgid(),
37
dirfd() */
37
38
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
38
39
FD_SET(), FD_ISSET(), FD_CLR */
39
40
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
40
WEXITSTATUS(), WTERMSIG() */
41
#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
41
WEXITSTATUS() */
42
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
42
43
#include <iso646.h> /* and, or, not */
43
#include <dirent.h> /* struct dirent, scandirat() */
44
#include <unistd.h> /* fcntl(), F_GETFD, F_SETFD,
45
FD_CLOEXEC, write(), STDOUT_FILENO,
46
struct stat, fstat(), close(),
47
setgid(), setuid(), S_ISREG(),
48
faccessat() pipe2(), fork(),
49
_exit(), dup2(), fexecve(), read()
50
*/
44
#include <dirent.h> /* DIR, struct dirent, opendir(),
45
readdir(), closedir(), dirfd() */
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() */
51
53
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
52
FD_CLOEXEC, openat(), scandirat(),
53
pipe2() */
54
#include <string.h> /* strsep, strlen(), strsignal(),
55
strcmp(), strncmp() */
54
FD_CLOEXEC */
55
#include <string.h> /* strsep, strlen(), asprintf() */
56
56
#include <errno.h> /* errno */
57
57
#include <argp.h> /* struct argp_option, struct
58
58
argp_state, struct argp,
65
65
SIG_UNBLOCK, kill(), sig_atomic_t
66
66
*/
67
67
#include <errno.h> /* errno, EBADF */
68
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
69
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,
70
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
71
#include <errno.h> /* errno */
72
#include <error.h> /* error() */
73
#include <fnmatch.h> /* fnmatch() */
68
#include <inttypes.h> /* intmax_t, SCNdMAX, PRIdMAX, */
74
69
75
70
#define BUFFER_SIZE 256
76
71
77
72
#define PDIR "/lib/mandos/plugins.d"
78
#define PHDIR "/lib/mandos/plugin-helpers"
79
73
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
80
74
81
75
const char *argp_program_version = "plugin-runner " VERSION;
82
const char *argp_program_bug_address = "<mandos@recompile.se>";
76
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
83
77
84
78
typedef struct plugin{
85
79
char *name; /* can be NULL or any plugin name */
88
82
char **environ;
89
83
int envc;
90
84
bool disabled;
91
85
92
86
/* Variables used for running processes*/
93
87
pid_t pid;
94
88
int fd;
105
99
106
100
/* Gets an existing plugin based on name,
107
101
or if none is found, creates a new one */
108
__attribute__((warn_unused_result))
109
102
static plugin *getplugin(char *name){
110
/* Check for existing plugin with that name */
103
/* Check for exiting plugin with that name */
111
104
for(plugin *p = plugin_list; p != NULL; p = p->next){
112
105
if((p->name == name)
113
106
or (p->name and name and (strcmp(p->name, name) == 0))){
115
108
}
116
109
}
117
110
/* Create a new plugin */
118
plugin *new_plugin = NULL;
119
do {
120
new_plugin = malloc(sizeof(plugin));
121
} while(new_plugin == NULL and errno == EINTR);
111
plugin *new_plugin = malloc(sizeof(plugin));
122
112
if(new_plugin == NULL){
123
113
return NULL;
124
114
}
125
115
char *copy_name = NULL;
126
116
if(name != NULL){
127
do {
128
copy_name = strdup(name);
129
} while(copy_name == NULL and errno == EINTR);
117
copy_name = strdup(name);
130
118
if(copy_name == NULL){
131
int e = errno;
132
119
free(new_plugin);
133
errno = e;
134
120
return NULL;
135
121
}
136
122
}
140
126
.disabled = false,
141
127
.next = plugin_list };
142
128
143
do {
144
new_plugin->argv = malloc(sizeof(char *) * 2);
145
} while(new_plugin->argv == NULL and errno == EINTR);
129
new_plugin->argv = malloc(sizeof(char *) * 2);
146
130
if(new_plugin->argv == NULL){
147
int e = errno;
148
131
free(copy_name);
149
132
free(new_plugin);
150
errno = e;
151
133
return NULL;
152
134
}
153
135
new_plugin->argv[0] = copy_name;
154
136
new_plugin->argv[1] = NULL;
155
137
156
do {
157
new_plugin->environ = malloc(sizeof(char *));
158
} while(new_plugin->environ == NULL and errno == EINTR);
138
new_plugin->environ = malloc(sizeof(char *));
159
139
if(new_plugin->environ == NULL){
160
int e = errno;
161
140
free(copy_name);
162
141
free(new_plugin->argv);
163
142
free(new_plugin);
164
errno = e;
165
143
return NULL;
166
144
}
167
145
new_plugin->environ[0] = NULL;
172
150
}
173
151
174
152
/* Helper function for add_argument and add_environment */
175
__attribute__((nonnull, warn_unused_result))
176
153
static bool add_to_char_array(const char *new, char ***array,
177
154
int *len){
178
155
/* Resize the pointed-to array to hold one more pointer */
179
char **new_array = NULL;
180
do {
181
new_array = realloc(*array, sizeof(char *)
182
* (size_t) ((*len) + 2));
183
} while(new_array == NULL and errno == EINTR);
156
*array = realloc(*array, sizeof(char *)
157
* (size_t) ((*len) + 2));
184
158
/* Malloc check */
185
if(new_array == NULL){
159
if(*array == NULL){
186
160
return false;
187
161
}
188
*array = new_array;
189
162
/* Make a copy of the new string */
190
char *copy;
191
do {
192
copy = strdup(new);
193
} while(copy == NULL and errno == EINTR);
163
char *copy = strdup(new);
194
164
if(copy == NULL){
195
165
return false;
196
166
}
203
173
}
204
174
205
175
/* Add to a plugin's argument vector */
206
__attribute__((nonnull(2), warn_unused_result))
207
176
static bool add_argument(plugin *p, const char *arg){
208
177
if(p == NULL){
209
178
return false;
212
181
}
213
182
214
183
/* Add to a plugin's environment */
215
__attribute__((nonnull(2), warn_unused_result))
216
184
static bool add_environment(plugin *p, const char *def, bool replace){
217
185
if(p == NULL){
218
186
return false;
220
188
/* namelen = length of name of environment variable */
221
189
size_t namelen = (size_t)(strchrnul(def, '=') - def);
222
190
/* Search for this environment variable */
223
for(char **envdef = p->environ; *envdef != NULL; envdef++){
224
if(strncmp(*envdef, def, namelen + 1) == 0){
191
for(char **e = p->environ; *e != NULL; e++){
192
if(strncmp(*e, def, namelen + 1) == 0){
225
193
/* It already exists */
226
194
if(replace){
227
char *new_envdef;
228
do {
229
new_envdef = realloc(*envdef, strlen(def) + 1);
230
} while(new_envdef == NULL and errno == EINTR);
231
if(new_envdef == NULL){
195
char *new = realloc(*e, strlen(def) + 1);
196
if(new == NULL){
232
197
return false;
233
198
}
234
*envdef = new_envdef;
235
strcpy(*envdef, def);
199
*e = new;
200
strcpy(*e, def);
236
201
}
237
202
return true;
238
203
}
240
205
return add_to_char_array(def, &(p->environ), &(p->envc));
241
206
}
242
207
243
#ifndef O_CLOEXEC
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
#endif /* not O_CLOEXEC */
261
222
262
223
263
224
/* Mark processes as completed when they exit, and save their exit
277
238
/* No child processes */
278
239
break;
279
240
}
280
error(0, errno, "waitpid");
241
perror("waitpid");
281
242
}
282
243
283
244
/* A child exited, find it in process_list */
295
256
}
296
257
297
258
/* Prints out a password to stdout */
298
__attribute__((nonnull, warn_unused_result))
299
259
static bool print_out_password(const char *buffer, size_t length){
300
260
ssize_t ret;
301
261
for(size_t written = 0; written < length; written += (size_t)ret){
309
269
}
310
270
311
271
/* Removes and free a plugin from the plugin list */
312
__attribute__((nonnull))
313
272
static void free_plugin(plugin *plugin_node){
314
273
315
274
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
321
280
}
322
281
free(plugin_node->environ);
323
282
free(plugin_node->buffer);
324
283
325
284
/* Removes the plugin from the singly-linked list */
326
285
if(plugin_node == plugin_list){
327
286
/* First one - simple */
347
306
348
307
int main(int argc, char *argv[]){
349
308
char *plugindir = NULL;
350
char *pluginhelperdir = NULL;
351
309
char *argfile = NULL;
352
310
FILE *conffp;
353
struct dirent **direntries = NULL;
311
size_t d_name_len;
312
DIR *dir = NULL;
313
struct dirent *dirst;
354
314
struct stat st;
355
315
fd_set rfds_all;
356
int ret, maxfd = 0;
316
int ret, numchars, maxfd = 0;
357
317
ssize_t sret;
318
intmax_t tmpmax;
358
319
uid_t uid = 65534;
359
320
gid_t gid = 65534;
360
321
bool debug = false;
364
325
.sa_flags = SA_NOCLDSTOP };
365
326
char **custom_argv = NULL;
366
327
int custom_argc = 0;
367
int dir_fd = -1;
368
328
369
329
/* Establish a signal handler */
370
330
sigemptyset(&sigchld_action.sa_mask);
371
331
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
372
332
if(ret == -1){
373
error(0, errno, "sigaddset");
374
exitstatus = EX_OSERR;
333
perror("sigaddset");
334
exitstatus = EXIT_FAILURE;
375
335
goto fallback;
376
336
}
377
337
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
378
338
if(ret == -1){
379
error(0, errno, "sigaction");
380
exitstatus = EX_OSERR;
339
perror("sigaction");
340
exitstatus = EXIT_FAILURE;
381
341
goto fallback;
382
342
}
383
343
415
375
.doc = "Group ID the plugins will run as", .group = 3 },
416
376
{ .name = "debug", .key = 132,
417
377
.doc = "Debug mode", .group = 4 },
418
{ .name = "plugin-helper-dir", .key = 133,
419
.arg = "DIRECTORY",
420
.doc = "Specify a different plugin helper directory",
421
.group = 2 },
422
/*
423
* These reproduce what we would get without ARGP_NO_HELP
424
*/
425
{ .name = "help", .key = '?',
426
.doc = "Give this help list", .group = -1 },
427
{ .name = "usage", .key = -3,
428
.doc = "Give a short usage message", .group = -1 },
429
{ .name = "version", .key = 'V',
430
.doc = "Print program version", .group = -1 },
431
378
{ .name = NULL }
432
379
};
433
380
434
__attribute__((nonnull(3)))
435
error_t parse_opt(int key, char *arg, struct argp_state *state){
436
errno = 0;
381
error_t parse_opt(int key, char *arg, __attribute__((unused))
382
struct argp_state *state){
437
383
switch(key){
438
char *tmp;
439
intmax_t tmp_id;
440
384
case 'g': /* --global-options */
441
{
385
if(arg != NULL){
442
386
char *plugin_option;
443
387
while((plugin_option = strsep(&arg, ",")) != NULL){
388
if(plugin_option[0] == '\0'){
389
continue;
390
}
444
391
if(not add_argument(getplugin(NULL), plugin_option)){
445
break;
392
perror("add_argument");
393
return ARGP_ERR_UNKNOWN;
446
394
}
447
395
}
448
errno = 0;
449
396
}
450
397
break;
451
398
case 'G': /* --global-env */
452
if(add_environment(getplugin(NULL), arg, true)){
453
errno = 0;
399
if(arg == NULL){
400
break;
401
}
402
if(not add_environment(getplugin(NULL), arg, true)){
403
perror("add_environment");
454
404
}
455
405
break;
456
406
case 'o': /* --options-for */
457
{
458
char *option_list = strchr(arg, ':');
459
if(option_list == NULL){
460
argp_error(state, "No colon in \"%s\"", arg);
461
errno = EINVAL;
462
break;
463
}
464
*option_list = '\0';
465
option_list++;
466
if(arg[0] == '\0'){
467
argp_error(state, "Empty plugin name");
468
errno = EINVAL;
469
break;
470
}
471
char *option;
472
while((option = strsep(&option_list, ",")) != NULL){
473
if(not add_argument(getplugin(arg), option)){
474
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;
475
417
}
476
418
}
477
errno = 0;
478
419
}
479
420
break;
480
421
case 'E': /* --env-for */
422
if(arg == NULL){
423
break;
424
}
481
425
{
482
426
char *envdef = strchr(arg, ':');
483
427
if(envdef == NULL){
484
argp_error(state, "No colon in \"%s\"", arg);
485
errno = EINVAL;
486
428
break;
487
429
}
488
430
*envdef = '\0';
489
envdef++;
490
if(arg[0] == '\0'){
491
argp_error(state, "Empty plugin name");
492
errno = EINVAL;
493
break;
494
}
495
if(add_environment(getplugin(arg), envdef, true)){
496
errno = 0;
431
if(not add_environment(getplugin(arg), envdef+1, true)){
432
perror("add_environment");
497
433
}
498
434
}
499
435
break;
500
436
case 'd': /* --disable */
501
{
437
if(arg != NULL){
502
438
plugin *p = getplugin(arg);
503
if(p != NULL){
504
p->disabled = true;
505
errno = 0;
439
if(p == NULL){
440
return ARGP_ERR_UNKNOWN;
506
441
}
442
p->disabled = true;
507
443
}
508
444
break;
509
445
case 'e': /* --enable */
510
{
446
if(arg != NULL){
511
447
plugin *p = getplugin(arg);
512
if(p != NULL){
513
p->disabled = false;
514
errno = 0;
448
if(p == NULL){
449
return ARGP_ERR_UNKNOWN;
515
450
}
451
p->disabled = false;
516
452
}
517
453
break;
518
454
case 128: /* --plugin-dir */
519
455
free(plugindir);
520
456
plugindir = strdup(arg);
521
if(plugindir != NULL){
522
errno = 0;
523
}
457
if(plugindir == NULL){
458
perror("strdup");
459
}
524
460
break;
525
461
case 129: /* --config-file */
526
462
/* This is already done by parse_opt_config_file() */
527
463
break;
528
464
case 130: /* --userid */
529
tmp_id = strtoimax(arg, &tmp, 10);
530
if(errno != 0 or tmp == arg or *tmp != '\0'
531
or tmp_id != (uid_t)tmp_id){
532
argp_error(state, "Bad user ID number: \"%s\", using %"
533
PRIdMAX, arg, (intmax_t)uid);
534
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;
535
472
}
536
uid = (uid_t)tmp_id;
537
errno = 0;
538
473
break;
539
474
case 131: /* --groupid */
540
tmp_id = strtoimax(arg, &tmp, 10);
541
if(errno != 0 or tmp == arg or *tmp != '\0'
542
or tmp_id != (gid_t)tmp_id){
543
argp_error(state, "Bad group ID number: \"%s\", using %"
544
PRIdMAX, arg, (intmax_t)gid);
545
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;
546
482
}
547
gid = (gid_t)tmp_id;
548
errno = 0;
549
483
break;
550
484
case 132: /* --debug */
551
485
debug = true;
552
486
break;
553
case 133: /* --plugin-helper-dir */
554
free(pluginhelperdir);
555
pluginhelperdir = strdup(arg);
556
if(pluginhelperdir != NULL){
557
errno = 0;
558
}
559
break;
560
/*
561
* These reproduce what we would get without ARGP_NO_HELP
562
*/
563
case '?': /* --help */
564
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
565
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
566
case -3: /* --usage */
567
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
568
argp_state_help(state, state->out_stream,
569
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
570
case 'V': /* --version */
571
fprintf(state->out_stream, "%s\n", argp_program_version);
572
exit(EXIT_SUCCESS);
573
break;
574
487
/*
575
488
* When adding more options before this line, remember to also add a
576
489
* "case" to the "parse_opt_config_file" function below.
579
492
/* Cryptsetup always passes an argument, which is an empty
580
493
string if "none" was specified in /etc/crypttab. So if
581
494
argument was empty, we ignore it silently. */
582
if(arg[0] == '\0'){
583
break;
495
if(arg[0] != '\0'){
496
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
584
497
}
498
break;
499
case ARGP_KEY_END:
500
break;
585
501
default:
586
502
return ARGP_ERR_UNKNOWN;
587
503
}
588
return errno; /* Set to 0 at start */
504
return 0;
589
505
}
590
506
591
507
/* This option parser is the same as parse_opt() above, except it
593
509
error_t parse_opt_config_file(int key, char *arg,
594
510
__attribute__((unused))
595
511
struct argp_state *state){
596
errno = 0;
597
512
switch(key){
598
513
case 'g': /* --global-options */
599
514
case 'G': /* --global-env */
606
521
case 129: /* --config-file */
607
522
free(argfile);
608
523
argfile = strdup(arg);
609
if(argfile != NULL){
610
errno = 0;
524
if(argfile == NULL){
525
perror("strdup");
611
526
}
612
break;
527
break;
613
528
case 130: /* --userid */
614
529
case 131: /* --groupid */
615
530
case 132: /* --debug */
616
case 133: /* --plugin-helper-dir */
617
case '?': /* --help */
618
case -3: /* --usage */
619
case 'V': /* --version */
620
531
case ARGP_KEY_ARG:
532
case ARGP_KEY_END:
621
533
break;
622
534
default:
623
535
return ARGP_ERR_UNKNOWN;
624
536
}
625
return errno;
537
return 0;
626
538
}
627
539
628
540
struct argp argp = { .options = options,
632
544
633
545
/* Parse using parse_opt_config_file() in order to get the custom
634
546
config file location, if any. */
635
ret = argp_parse(&argp, argc, argv,
636
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
637
NULL, NULL);
638
switch(ret){
639
case 0:
640
break;
641
case ENOMEM:
642
default:
643
errno = ret;
644
error(0, errno, "argp_parse");
645
exitstatus = EX_OSERR;
646
goto fallback;
647
case EINVAL:
648
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;
649
551
goto fallback;
650
552
}
651
553
657
559
conffp = fopen(AFILE, "r");
658
560
} else {
659
561
conffp = fopen(argfile, "r");
660
}
562
}
661
563
if(conffp != NULL){
662
564
char *org_line = NULL;
663
565
char *p, *arg, *new_arg, *line;
664
566
size_t size = 0;
665
567
const char whitespace_delims[] = " \r\t\f\v\n";
666
568
const char comment_delim[] = "#";
667
569
668
570
custom_argc = 1;
669
571
custom_argv = malloc(sizeof(char*) * 2);
670
572
if(custom_argv == NULL){
671
error(0, errno, "malloc");
672
exitstatus = EX_OSERR;
573
perror("malloc");
574
exitstatus = EXIT_FAILURE;
673
575
goto fallback;
674
576
}
675
577
custom_argv[0] = argv[0];
676
578
custom_argv[1] = NULL;
677
579
678
580
/* for each line in the config file, strip whitespace and ignore
679
581
commented text */
680
582
while(true){
682
584
if(sret == -1){
683
585
break;
684
586
}
685
587
686
588
line = org_line;
687
589
arg = strsep(&line, comment_delim);
688
590
while((p = strsep(&arg, whitespace_delims)) != NULL){
691
593
}
692
594
new_arg = strdup(p);
693
595
if(new_arg == NULL){
694
error(0, errno, "strdup");
695
exitstatus = EX_OSERR;
596
perror("strdup");
597
exitstatus = EXIT_FAILURE;
696
598
free(org_line);
697
599
goto fallback;
698
600
}
699
601
700
602
custom_argc += 1;
701
{
702
char **new_argv = realloc(custom_argv, sizeof(char *)
703
* ((size_t)custom_argc + 1));
704
if(new_argv == NULL){
705
error(0, errno, "realloc");
706
exitstatus = EX_OSERR;
707
free(new_arg);
708
free(org_line);
709
goto fallback;
710
} else {
711
custom_argv = new_argv;
712
}
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;
713
610
}
714
611
custom_argv[custom_argc-1] = new_arg;
715
custom_argv[custom_argc] = NULL;
612
custom_argv[custom_argc] = NULL;
716
613
}
717
614
}
718
do {
719
ret = fclose(conffp);
720
} while(ret == EOF and errno == EINTR);
721
if(ret == EOF){
722
error(0, errno, "fclose");
723
exitstatus = EX_IOERR;
724
goto fallback;
725
}
726
615
free(org_line);
727
616
} else {
728
617
/* Check for harmful errors and go to fallback. Other errors might
729
618
not affect opening plugins */
730
619
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
731
error(0, errno, "fopen");
732
exitstatus = EX_OSERR;
620
perror("fopen");
621
exitstatus = EXIT_FAILURE;
733
622
goto fallback;
734
623
}
735
624
}
736
/* If there were any arguments from the configuration file, pass
737
them to parser as command line arguments */
625
/* If there was any arguments from configuration file,
626
pass them to parser as command arguments */
738
627
if(custom_argv != NULL){
739
ret = argp_parse(&argp, custom_argc, custom_argv,
740
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
741
NULL, NULL);
742
switch(ret){
743
case 0:
744
break;
745
case ENOMEM:
746
default:
747
errno = ret;
748
error(0, errno, "argp_parse");
749
exitstatus = EX_OSERR;
750
goto fallback;
751
case EINVAL:
752
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;
753
633
goto fallback;
754
634
}
755
635
}
756
636
757
637
/* Parse actual command line arguments, to let them override the
758
638
config file */
759
ret = argp_parse(&argp, argc, argv,
760
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
761
NULL, NULL);
762
switch(ret){
763
case 0:
764
break;
765
case ENOMEM:
766
default:
767
errno = ret;
768
error(0, errno, "argp_parse");
769
exitstatus = EX_OSERR;
770
goto fallback;
771
case EINVAL:
772
exitstatus = EX_USAGE;
773
goto fallback;
774
}
775
776
{
777
char *pluginhelperenv;
778
bool bret = true;
779
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
780
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
781
if(ret != -1){
782
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
783
}
784
if(ret == -1 or not bret){
785
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
786
" environment variable to \"%s\" for all plugins\n",
787
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
788
}
789
if(ret != -1){
790
free(pluginhelperenv);
791
}
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;
643
goto fallback;
792
644
}
793
645
794
646
if(debug){
805
657
}
806
658
}
807
659
808
if(getuid() == 0){
809
/* Work around Debian bug #633582:
810
<http://bugs.debian.org/633582> */
811
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
812
if(plugindir_fd == -1){
813
if(errno != ENOENT){
814
error(0, errno, "open(\"" PDIR "\")");
815
}
816
} else {
817
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
818
if(ret == -1){
819
error(0, errno, "fstat");
820
} else {
821
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
822
ret = fchown(plugindir_fd, uid, gid);
823
if(ret == -1){
824
error(0, errno, "fchown");
825
}
826
}
827
}
828
close(plugindir_fd);
829
}
830
}
831
832
/* Lower permissions */
833
ret = setgid(gid);
660
/* Strip permissions down to nobody */
661
setgid(gid);
834
662
if(ret == -1){
835
error(0, errno, "setgid");
663
perror("setgid");
836
664
}
837
665
ret = setuid(uid);
838
666
if(ret == -1){
839
error(0, errno, "setuid");
840
}
841
842
/* 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 */
843
683
{
844
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
845
#ifdef O_CLOEXEC
846
O_CLOEXEC
847
#else /* not O_CLOEXEC */
848
0
849
#endif /* not O_CLOEXEC */
850
);
851
if(dir_fd == -1){
852
error(0, errno, "Could not open plugin dir");
853
exitstatus = EX_UNAVAILABLE;
854
goto fallback;
855
}
856
857
#ifndef O_CLOEXEC
858
/* Set the FD_CLOEXEC flag on the directory */
859
ret = set_cloexec_flag(dir_fd);
860
if(ret < 0){
861
error(0, errno, "set_cloexec_flag");
862
exitstatus = EX_OSERR;
863
goto fallback;
864
}
865
#endif /* O_CLOEXEC */
866
}
867
868
int good_name(const struct dirent * const dirent){
869
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
870
"*.dpkg-old", "*.dpkg-bak",
871
"*.dpkg-divert", 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, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
882
!= FNM_NOMATCH){
883
if(debug){
884
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
885
" matching pattern %s\n", dirent->d_name, *pat);
886
}
887
return 0;
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;
888
691
}
889
692
}
890
return 1;
891
}
892
893
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
894
alphasort);
895
if(numplugins == -1){
896
error(0, errno, "Could not scan plugin dir");
897
direntries = NULL;
898
exitstatus = EX_OSERR;
899
goto fallback;
900
693
}
901
694
902
695
FD_ZERO(&rfds_all);
903
696
904
697
/* Read and execute any executable in the plugin directory*/
905
for(int i = 0; i < numplugins; i++){
906
907
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
908
if(plugin_fd == -1){
909
error(0, errno, "Could not open plugin");
910
free(direntries[i]);
698
while(true){
699
dirst = readdir(dir);
700
701
/* All directory entries have been processed */
702
if(dirst == NULL){
703
if(errno == EBADF){
704
perror("readdir");
705
exitstatus = EXIT_FAILURE;
706
goto fallback;
707
}
708
break;
709
}
710
711
d_name_len = strlen(dirst->d_name);
712
713
/* Ignore dotfiles, backup files and other junk */
714
{
715
bool bad_name = false;
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
}
763
if(ret < 0){
764
perror("asprintf");
911
765
continue;
912
766
}
913
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
767
768
ret = stat(filename, &st);
914
769
if(ret == -1){
915
error(0, errno, "stat");
916
close(plugin_fd);
917
free(direntries[i]);
770
perror("stat");
771
free(filename);
918
772
continue;
919
773
}
920
774
921
775
/* Ignore non-executable files */
922
if(not S_ISREG(st.st_mode)
923
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
924
X_OK, 0)) != 0)){
776
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
925
777
if(debug){
926
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
927
" with bad type or mode\n",
928
plugindir != NULL ? plugindir : PDIR,
929
direntries[i]->d_name);
778
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
779
" with bad type or mode\n", filename);
930
780
}
931
close(plugin_fd);
932
free(direntries[i]);
781
free(filename);
933
782
continue;
934
783
}
935
784
936
plugin *p = getplugin(direntries[i]->d_name);
785
plugin *p = getplugin(dirst->d_name);
937
786
if(p == NULL){
938
error(0, errno, "getplugin");
939
close(plugin_fd);
940
free(direntries[i]);
787
perror("getplugin");
788
free(filename);
941
789
continue;
942
790
}
943
791
if(p->disabled){
944
792
if(debug){
945
793
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
946
direntries[i]->d_name);
794
dirst->d_name);
947
795
}
948
close(plugin_fd);
949
free(direntries[i]);
796
free(filename);
950
797
continue;
951
798
}
952
799
{
955
802
if(g != NULL){
956
803
for(char **a = g->argv + 1; *a != NULL; a++){
957
804
if(not add_argument(p, *a)){
958
error(0, errno, "add_argument");
805
perror("add_argument");
959
806
}
960
807
}
961
808
/* Add global environment variables */
962
809
for(char **e = g->environ; *e != NULL; e++){
963
810
if(not add_environment(p, *e, false)){
964
error(0, errno, "add_environment");
811
perror("add_environment");
965
812
}
966
813
}
967
814
}
968
815
}
969
/* If this plugin has any environment variables, we need to
970
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. */
971
819
if(p->environ[0] != NULL){
972
820
for(char **e = environ; *e != NULL; e++){
973
821
if(not add_environment(p, *e, false)){
974
error(0, errno, "add_environment");
822
perror("add_environment");
975
823
}
976
824
}
977
825
}
978
826
979
827
int pipefd[2];
980
#ifndef O_CLOEXEC
981
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
982
#else /* O_CLOEXEC */
983
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
984
#endif /* O_CLOEXEC */
828
ret = pipe(pipefd);
985
829
if(ret == -1){
986
error(0, errno, "pipe");
987
exitstatus = EX_OSERR;
988
free(direntries[i]);
989
goto fallback;
990
}
991
if(pipefd[0] >= FD_SETSIZE){
992
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
993
FD_SETSIZE);
994
close(pipefd[0]);
995
close(pipefd[1]);
996
exitstatus = EX_OSERR;
997
free(direntries[i]);
998
goto fallback;
999
}
1000
#ifndef O_CLOEXEC
830
perror("pipe");
831
exitstatus = EXIT_FAILURE;
832
goto fallback;
833
}
1001
834
/* Ask OS to automatic close the pipe on exec */
1002
835
ret = set_cloexec_flag(pipefd[0]);
1003
836
if(ret < 0){
1004
error(0, errno, "set_cloexec_flag");
1005
close(pipefd[0]);
1006
close(pipefd[1]);
1007
exitstatus = EX_OSERR;
1008
free(direntries[i]);
837
perror("set_cloexec_flag");
838
exitstatus = EXIT_FAILURE;
1009
839
goto fallback;
1010
840
}
1011
841
ret = set_cloexec_flag(pipefd[1]);
1012
842
if(ret < 0){
1013
error(0, errno, "set_cloexec_flag");
1014
close(pipefd[0]);
1015
close(pipefd[1]);
1016
exitstatus = EX_OSERR;
1017
free(direntries[i]);
843
perror("set_cloexec_flag");
844
exitstatus = EXIT_FAILURE;
1018
845
goto fallback;
1019
846
}
1020
#endif /* not O_CLOEXEC */
1021
847
/* Block SIGCHLD until process is safely in process list */
1022
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1023
&sigchld_action.sa_mask,
1024
NULL));
848
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1025
849
if(ret < 0){
1026
error(0, errno, "sigprocmask");
1027
exitstatus = EX_OSERR;
1028
free(direntries[i]);
850
perror("sigprocmask");
851
exitstatus = EXIT_FAILURE;
1029
852
goto fallback;
1030
853
}
1031
854
/* Starting a new process to be watched */
1032
pid_t pid;
1033
do {
1034
pid = fork();
1035
} while(pid == -1 and errno == EINTR);
855
pid_t pid = fork();
1036
856
if(pid == -1){
1037
error(0, errno, "fork");
1038
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1039
&sigchld_action.sa_mask, NULL));
1040
close(pipefd[0]);
1041
close(pipefd[1]);
1042
exitstatus = EX_OSERR;
1043
free(direntries[i]);
857
perror("fork");
858
exitstatus = EXIT_FAILURE;
1044
859
goto fallback;
1045
860
}
1046
861
if(pid == 0){
1047
862
/* this is the child process */
1048
863
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1049
864
if(ret < 0){
1050
error(0, errno, "sigaction");
1051
_exit(EX_OSERR);
865
perror("sigaction");
866
_exit(EXIT_FAILURE);
1052
867
}
1053
868
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1054
869
if(ret < 0){
1055
error(0, errno, "sigprocmask");
1056
_exit(EX_OSERR);
870
perror("sigprocmask");
871
_exit(EXIT_FAILURE);
1057
872
}
1058
873
1059
874
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1060
875
if(ret == -1){
1061
error(0, errno, "dup2");
1062
_exit(EX_OSERR);
876
perror("dup2");
877
_exit(EXIT_FAILURE);
1063
878
}
1064
879
1065
if(fexecve(plugin_fd, p->argv,
1066
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1067
error(0, errno, "fexecve for %s/%s",
1068
plugindir != NULL ? plugindir : PDIR,
1069
direntries[i]->d_name);
1070
_exit(EX_OSERR);
880
if(dirfd(dir) < 0){
881
/* If dir has no file descriptor, we could not set FD_CLOEXEC
882
above and must now close it manually here. */
883
closedir(dir);
884
}
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
}
1071
895
}
1072
896
/* no return */
1073
897
}
1074
898
/* Parent process */
1075
899
close(pipefd[1]); /* Close unused write end of pipe */
1076
close(plugin_fd);
1077
plugin *new_plugin = getplugin(direntries[i]->d_name);
900
free(filename);
901
plugin *new_plugin = getplugin(dirst->d_name);
1078
902
if(new_plugin == NULL){
1079
error(0, errno, "getplugin");
1080
ret = (int)(TEMP_FAILURE_RETRY
1081
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1082
NULL)));
903
perror("getplugin");
904
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1083
905
if(ret < 0){
1084
error(0, errno, "sigprocmask");
906
perror("sigprocmask");
1085
907
}
1086
exitstatus = EX_OSERR;
1087
free(direntries[i]);
908
exitstatus = EXIT_FAILURE;
1088
909
goto fallback;
1089
910
}
1090
free(direntries[i]);
1091
911
1092
912
new_plugin->pid = pid;
1093
913
new_plugin->fd = pipefd[0];
1094
914
1095
915
/* Unblock SIGCHLD so signal handler can be run if this process
1096
916
has already completed */
1097
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1098
&sigchld_action.sa_mask,
1099
NULL));
917
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1100
918
if(ret < 0){
1101
error(0, errno, "sigprocmask");
1102
exitstatus = EX_OSERR;
919
perror("sigprocmask");
920
exitstatus = EXIT_FAILURE;
1103
921
goto fallback;
1104
922
}
1105
923
1110
928
}
1111
929
}
1112
930
1113
free(direntries);
1114
direntries = NULL;
1115
close(dir_fd);
1116
dir_fd = -1;
931
closedir(dir);
932
dir = NULL;
1117
933
free_plugin(getplugin(NULL));
1118
934
1119
935
for(plugin *p = plugin_list; p != NULL; p = p->next){
1131
947
while(plugin_list){
1132
948
fd_set rfds = rfds_all;
1133
949
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1134
if(select_ret == -1 and errno != EINTR){
1135
error(0, errno, "select");
1136
exitstatus = EX_OSERR;
950
if(select_ret == -1){
951
perror("select");
952
exitstatus = EXIT_FAILURE;
1137
953
goto fallback;
1138
954
}
1139
955
/* OK, now either a process completed, or something can be read
1145
961
if(not WIFEXITED(proc->status)
1146
962
or WEXITSTATUS(proc->status) != 0){
1147
963
/* Bad exit by plugin */
1148
964
1149
965
if(debug){
1150
966
if(WIFEXITED(proc->status)){
1151
967
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1154
970
WEXITSTATUS(proc->status));
1155
971
} else if(WIFSIGNALED(proc->status)){
1156
972
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1157
" signal %d: %s\n", proc->name,
973
" signal %d\n", proc->name,
1158
974
(intmax_t) (proc->pid),
1159
WTERMSIG(proc->status),
1160
strsignal(WTERMSIG(proc->status)));
975
WTERMSIG(proc->status));
976
} else if(WCOREDUMP(proc->status)){
977
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
978
" core\n", proc->name, (intmax_t) (proc->pid));
1161
979
}
1162
980
}
1163
981
1164
982
/* Remove the plugin */
1165
983
FD_CLR(proc->fd, &rfds_all);
1166
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
}
1215
1029
}
1216
1030
/* Before reading, make the process' data buffer large enough */
1217
1031
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1218
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1219
+ (size_t) BUFFER_SIZE);
1220
if(new_buffer == NULL){
1221
error(0, errno, "malloc");
1222
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;
1223
1037
goto fallback;
1224
1038
}
1225
proc->buffer = new_buffer;
1226
1039
proc->buffer_size += BUFFER_SIZE;
1227
1040
}
1228
1041
/* Read from the process */
1229
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1230
proc->buffer
1231
+ proc->buffer_length,
1232
BUFFER_SIZE));
1042
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1043
BUFFER_SIZE);
1233
1044
if(sret < 0){
1234
1045
/* Read error from this process; ignore the error */
1235
1046
proc = proc->next;
1243
1054
}
1244
1055
}
1245
1056
}
1246
1247
1057
1058
1248
1059
fallback:
1249
1060
1250
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1251
and exitstatus != EX_OK)){
1061
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1252
1062
/* Fallback if all plugins failed, none are found or an error
1253
1063
occured */
1254
1064
bool bret;
1262
1072
}
1263
1073
bret = print_out_password(passwordbuffer, len);
1264
1074
if(not bret){
1265
error(0, errno, "print_out_password");
1266
exitstatus = EX_IOERR;
1075
perror("print_out_password");
1076
exitstatus = EXIT_FAILURE;
1267
1077
}
1268
1078
}
1269
1079
1270
1080
/* Restore old signal handler */
1271
1081
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1272
1082
if(ret == -1){
1273
error(0, errno, "sigaction");
1274
exitstatus = EX_OSERR;
1083
perror("sigaction");
1084
exitstatus = EXIT_FAILURE;
1275
1085
}
1276
1086
1277
1087
if(custom_argv != NULL){
1281
1091
free(custom_argv);
1282
1092
}
1283
1093
1284
free(direntries);
1285
1286
if(dir_fd != -1){
1287
close(dir_fd);
1094
if(dir != NULL){
1095
closedir(dir);
1288
1096
}
1289
1097
1290
1098
/* Kill the processes */
1294
1102
ret = kill(p->pid, SIGTERM);
1295
1103
if(ret == -1 and errno != ESRCH){
1296
1104
/* Set-uid proccesses might not get closed */
1297
error(0, errno, "kill");
1105
perror("kill");
1298
1106
}
1299
1107
}
1300
1108
}
1301
1109
1302
1110
/* Wait for any remaining child processes to terminate */
1303
do {
1111
do{
1304
1112
ret = wait(NULL);
1305
1113
} while(ret >= 0);
1306
1114
if(errno != ECHILD){
1307
error(0, errno, "wait");
1115
perror("wait");
1308
1116
}
1309
1117
1310
1118
free_plugin_list();
1311
1119
1312
1120
free(plugindir);
1313
free(pluginhelperdir);
1314
1121
free(argfile);
1315
1122
1316
1123
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0