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- Committer: Teddy Hogeborn
- Date: 2009-02-12 18:56:52 UTC
- Revision ID: teddy@fukt.bsnet.se-20090212185652-ast00yprt2pe2l4p
Overflows are not detected by sscanf(), so stop using it:
* plugin-runner.c (main/parse_opt): Change from using "sscanf()" to
"strtoimax()".
* plugins.d/mandos-client.c (main/parse_opt, main): Change from using
"sscanf()" to
"strtoimax()" and
"strtof()".
* splashy.c (main): Change from using "sscanf()" to "strtoimax()".
* usplash.c (main): - '' -
* plugin-runner.c (main/parse_opt): Change from using "sscanf()" to
"strtoimax()".
* plugins.d/mandos-client.c (main/parse_opt, main): Change from using
"sscanf()" to
"strtoimax()" and
"strtof()".
* splashy.c (main): Change from using "sscanf()" to "strtoimax()".
* usplash.c (main): - '' -
- 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,
66
66
*/
67
67
#include <errno.h> /* errno, EBADF */
68
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() */
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
316
int ret, 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){
383
char *tmp;
437
384
switch(key){
438
char *tmp;
439
intmax_t tmp_id;
440
385
case 'g': /* --global-options */
441
{
386
if(arg != NULL){
442
387
char *plugin_option;
443
388
while((plugin_option = strsep(&arg, ",")) != NULL){
389
if(plugin_option[0] == '\0'){
390
continue;
391
}
444
392
if(not add_argument(getplugin(NULL), plugin_option)){
445
break;
393
perror("add_argument");
394
return ARGP_ERR_UNKNOWN;
446
395
}
447
396
}
448
errno = 0;
449
397
}
450
398
break;
451
399
case 'G': /* --global-env */
452
if(add_environment(getplugin(NULL), arg, true)){
453
errno = 0;
400
if(arg == NULL){
401
break;
402
}
403
if(not add_environment(getplugin(NULL), arg, true)){
404
perror("add_environment");
454
405
}
455
406
break;
456
407
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;
408
if(arg != NULL){
409
char *plugin_name = strsep(&arg, ":");
410
if(plugin_name[0] == '\0'){
411
break;
412
}
413
char *plugin_option;
414
while((plugin_option = strsep(&arg, ",")) != NULL){
415
if(not add_argument(getplugin(plugin_name), plugin_option)){
416
perror("add_argument");
417
return ARGP_ERR_UNKNOWN;
475
418
}
476
419
}
477
errno = 0;
478
420
}
479
421
break;
480
422
case 'E': /* --env-for */
423
if(arg == NULL){
424
break;
425
}
481
426
{
482
427
char *envdef = strchr(arg, ':');
483
428
if(envdef == NULL){
484
argp_error(state, "No colon in \"%s\"", arg);
485
errno = EINVAL;
486
429
break;
487
430
}
488
431
*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;
432
if(not add_environment(getplugin(arg), envdef+1, true)){
433
perror("add_environment");
497
434
}
498
435
}
499
436
break;
500
437
case 'd': /* --disable */
501
{
438
if(arg != NULL){
502
439
plugin *p = getplugin(arg);
503
if(p != NULL){
504
p->disabled = true;
505
errno = 0;
440
if(p == NULL){
441
return ARGP_ERR_UNKNOWN;
506
442
}
443
p->disabled = true;
507
444
}
508
445
break;
509
446
case 'e': /* --enable */
510
{
447
if(arg != NULL){
511
448
plugin *p = getplugin(arg);
512
if(p != NULL){
513
p->disabled = false;
514
errno = 0;
449
if(p == NULL){
450
return ARGP_ERR_UNKNOWN;
515
451
}
452
p->disabled = false;
516
453
}
517
454
break;
518
455
case 128: /* --plugin-dir */
519
456
free(plugindir);
520
457
plugindir = strdup(arg);
521
if(plugindir != NULL){
522
errno = 0;
523
}
458
if(plugindir == NULL){
459
perror("strdup");
460
}
524
461
break;
525
462
case 129: /* --config-file */
526
463
/* This is already done by parse_opt_config_file() */
527
464
break;
528
465
case 130: /* --userid */
529
tmp_id = strtoimax(arg, &tmp, 10);
466
errno = 0;
467
tmpmax = strtoimax(arg, &tmp, 10);
530
468
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;
469
or tmpmax != (uid_t)tmpmax){
470
fprintf(stderr, "Bad user ID number: \"%s\", using %"
471
PRIdMAX "\n", arg, (intmax_t)uid);
472
} else {
473
uid = (uid_t)tmpmax;
535
474
}
536
uid = (uid_t)tmp_id;
537
errno = 0;
538
475
break;
539
476
case 131: /* --groupid */
540
tmp_id = strtoimax(arg, &tmp, 10);
477
errno = 0;
478
tmpmax = strtoimax(arg, &tmp, 10);
541
479
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;
480
or tmpmax != (gid_t)tmpmax){
481
fprintf(stderr, "Bad group ID number: \"%s\", using %"
482
PRIdMAX "\n", arg, (intmax_t)gid);
483
} else {
484
gid = (gid_t)tmpmax;
546
485
}
547
gid = (gid_t)tmp_id;
548
errno = 0;
549
486
break;
550
487
case 132: /* --debug */
551
488
debug = true;
552
489
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
490
/*
575
491
* When adding more options before this line, remember to also add a
576
492
* "case" to the "parse_opt_config_file" function below.
579
495
/* Cryptsetup always passes an argument, which is an empty
580
496
string if "none" was specified in /etc/crypttab. So if
581
497
argument was empty, we ignore it silently. */
582
if(arg[0] == '\0'){
583
break;
498
if(arg[0] != '\0'){
499
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
584
500
}
501
break;
502
case ARGP_KEY_END:
503
break;
585
504
default:
586
505
return ARGP_ERR_UNKNOWN;
587
506
}
588
return errno; /* Set to 0 at start */
507
return 0;
589
508
}
590
509
591
510
/* This option parser is the same as parse_opt() above, except it
593
512
error_t parse_opt_config_file(int key, char *arg,
594
513
__attribute__((unused))
595
514
struct argp_state *state){
596
errno = 0;
597
515
switch(key){
598
516
case 'g': /* --global-options */
599
517
case 'G': /* --global-env */
606
524
case 129: /* --config-file */
607
525
free(argfile);
608
526
argfile = strdup(arg);
609
if(argfile != NULL){
610
errno = 0;
527
if(argfile == NULL){
528
perror("strdup");
611
529
}
612
break;
530
break;
613
531
case 130: /* --userid */
614
532
case 131: /* --groupid */
615
533
case 132: /* --debug */
616
case 133: /* --plugin-helper-dir */
617
case '?': /* --help */
618
case -3: /* --usage */
619
case 'V': /* --version */
620
534
case ARGP_KEY_ARG:
535
case ARGP_KEY_END:
621
536
break;
622
537
default:
623
538
return ARGP_ERR_UNKNOWN;
624
539
}
625
return errno;
540
return 0;
626
541
}
627
542
628
543
struct argp argp = { .options = options,
632
547
633
548
/* Parse using parse_opt_config_file() in order to get the custom
634
549
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;
550
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
551
if(ret == ARGP_ERR_UNKNOWN){
552
fprintf(stderr, "Unknown error while parsing arguments\n");
553
exitstatus = EXIT_FAILURE;
649
554
goto fallback;
650
555
}
651
556
657
562
conffp = fopen(AFILE, "r");
658
563
} else {
659
564
conffp = fopen(argfile, "r");
660
}
565
}
661
566
if(conffp != NULL){
662
567
char *org_line = NULL;
663
568
char *p, *arg, *new_arg, *line;
664
569
size_t size = 0;
665
570
const char whitespace_delims[] = " \r\t\f\v\n";
666
571
const char comment_delim[] = "#";
667
572
668
573
custom_argc = 1;
669
574
custom_argv = malloc(sizeof(char*) * 2);
670
575
if(custom_argv == NULL){
671
error(0, errno, "malloc");
672
exitstatus = EX_OSERR;
576
perror("malloc");
577
exitstatus = EXIT_FAILURE;
673
578
goto fallback;
674
579
}
675
580
custom_argv[0] = argv[0];
676
581
custom_argv[1] = NULL;
677
582
678
583
/* for each line in the config file, strip whitespace and ignore
679
584
commented text */
680
585
while(true){
682
587
if(sret == -1){
683
588
break;
684
589
}
685
590
686
591
line = org_line;
687
592
arg = strsep(&line, comment_delim);
688
593
while((p = strsep(&arg, whitespace_delims)) != NULL){
691
596
}
692
597
new_arg = strdup(p);
693
598
if(new_arg == NULL){
694
error(0, errno, "strdup");
695
exitstatus = EX_OSERR;
599
perror("strdup");
600
exitstatus = EXIT_FAILURE;
696
601
free(org_line);
697
602
goto fallback;
698
603
}
699
604
700
605
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
}
606
custom_argv = realloc(custom_argv, sizeof(char *)
607
* ((unsigned int) custom_argc + 1));
608
if(custom_argv == NULL){
609
perror("realloc");
610
exitstatus = EXIT_FAILURE;
611
free(org_line);
612
goto fallback;
713
613
}
714
614
custom_argv[custom_argc-1] = new_arg;
715
custom_argv[custom_argc] = NULL;
615
custom_argv[custom_argc] = NULL;
716
616
}
717
617
}
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
618
free(org_line);
727
619
} else {
728
620
/* Check for harmful errors and go to fallback. Other errors might
729
621
not affect opening plugins */
730
622
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
731
error(0, errno, "fopen");
732
exitstatus = EX_OSERR;
623
perror("fopen");
624
exitstatus = EXIT_FAILURE;
733
625
goto fallback;
734
626
}
735
627
}
736
/* If there were any arguments from the configuration file, pass
737
them to parser as command line arguments */
628
/* If there was any arguments from configuration file,
629
pass them to parser as command arguments */
738
630
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;
631
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
632
0, NULL);
633
if(ret == ARGP_ERR_UNKNOWN){
634
fprintf(stderr, "Unknown error while parsing arguments\n");
635
exitstatus = EXIT_FAILURE;
753
636
goto fallback;
754
637
}
755
638
}
756
639
757
640
/* Parse actual command line arguments, to let them override the
758
641
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
}
642
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
643
if(ret == ARGP_ERR_UNKNOWN){
644
fprintf(stderr, "Unknown error while parsing arguments\n");
645
exitstatus = EXIT_FAILURE;
646
goto fallback;
792
647
}
793
648
794
649
if(debug){
805
660
}
806
661
}
807
662
808
if(getuid() == 0){
809
/* Work around Debian bug #633582:
810
<https://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);
663
/* Strip permissions down to nobody */
664
setgid(gid);
834
665
if(ret == -1){
835
error(0, errno, "setgid");
666
perror("setgid");
836
667
}
837
668
ret = setuid(uid);
838
669
if(ret == -1){
839
error(0, errno, "setuid");
840
}
841
842
/* Open plugin directory with close_on_exec flag */
670
perror("setuid");
671
}
672
673
if(plugindir == NULL){
674
dir = opendir(PDIR);
675
} else {
676
dir = opendir(plugindir);
677
}
678
679
if(dir == NULL){
680
perror("Could not open plugin dir");
681
exitstatus = EXIT_FAILURE;
682
goto fallback;
683
}
684
685
/* Set the FD_CLOEXEC flag on the directory, if possible */
843
686
{
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;
687
int dir_fd = dirfd(dir);
688
if(dir_fd >= 0){
689
ret = set_cloexec_flag(dir_fd);
690
if(ret < 0){
691
perror("set_cloexec_flag");
692
exitstatus = EXIT_FAILURE;
693
goto fallback;
888
694
}
889
695
}
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
696
}
901
697
902
698
FD_ZERO(&rfds_all);
903
699
904
700
/* 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]);
701
while(true){
702
dirst = readdir(dir);
703
704
/* All directory entries have been processed */
705
if(dirst == NULL){
706
if(errno == EBADF){
707
perror("readdir");
708
exitstatus = EXIT_FAILURE;
709
goto fallback;
710
}
711
break;
712
}
713
714
d_name_len = strlen(dirst->d_name);
715
716
/* Ignore dotfiles, backup files and other junk */
717
{
718
bool bad_name = false;
719
720
const char const *bad_prefixes[] = { ".", "#", NULL };
721
722
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
723
".dpkg-old",
724
".dpkg-bak",
725
".dpkg-divert", NULL };
726
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
727
size_t pre_len = strlen(*pre);
728
if((d_name_len >= pre_len)
729
and strncmp((dirst->d_name), *pre, pre_len) == 0){
730
if(debug){
731
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
732
" with bad prefix %s\n", dirst->d_name, *pre);
733
}
734
bad_name = true;
735
break;
736
}
737
}
738
if(bad_name){
739
continue;
740
}
741
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
742
size_t suf_len = strlen(*suf);
743
if((d_name_len >= suf_len)
744
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
745
== 0)){
746
if(debug){
747
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
748
" with bad suffix %s\n", dirst->d_name, *suf);
749
}
750
bad_name = true;
751
break;
752
}
753
}
754
755
if(bad_name){
756
continue;
757
}
758
}
759
760
char *filename;
761
if(plugindir == NULL){
762
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
763
} else {
764
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
765
}
766
if(ret < 0){
767
perror("asprintf");
911
768
continue;
912
769
}
913
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
770
771
ret = stat(filename, &st);
914
772
if(ret == -1){
915
error(0, errno, "stat");
916
close(plugin_fd);
917
free(direntries[i]);
773
perror("stat");
774
free(filename);
918
775
continue;
919
776
}
920
777
921
778
/* 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)){
779
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
925
780
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);
781
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
782
" with bad type or mode\n", filename);
930
783
}
931
close(plugin_fd);
932
free(direntries[i]);
784
free(filename);
933
785
continue;
934
786
}
935
787
936
plugin *p = getplugin(direntries[i]->d_name);
788
plugin *p = getplugin(dirst->d_name);
937
789
if(p == NULL){
938
error(0, errno, "getplugin");
939
close(plugin_fd);
940
free(direntries[i]);
790
perror("getplugin");
791
free(filename);
941
792
continue;
942
793
}
943
794
if(p->disabled){
944
795
if(debug){
945
796
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
946
direntries[i]->d_name);
797
dirst->d_name);
947
798
}
948
close(plugin_fd);
949
free(direntries[i]);
799
free(filename);
950
800
continue;
951
801
}
952
802
{
955
805
if(g != NULL){
956
806
for(char **a = g->argv + 1; *a != NULL; a++){
957
807
if(not add_argument(p, *a)){
958
error(0, errno, "add_argument");
808
perror("add_argument");
959
809
}
960
810
}
961
811
/* Add global environment variables */
962
812
for(char **e = g->environ; *e != NULL; e++){
963
813
if(not add_environment(p, *e, false)){
964
error(0, errno, "add_environment");
814
perror("add_environment");
965
815
}
966
816
}
967
817
}
968
818
}
969
/* If this plugin has any environment variables, we need to
970
duplicate the environment from this process, too. */
819
/* If this plugin has any environment variables, we will call
820
using execve and need to duplicate the environment from this
821
process, too. */
971
822
if(p->environ[0] != NULL){
972
823
for(char **e = environ; *e != NULL; e++){
973
824
if(not add_environment(p, *e, false)){
974
error(0, errno, "add_environment");
825
perror("add_environment");
975
826
}
976
827
}
977
828
}
978
829
979
830
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 */
831
ret = pipe(pipefd);
985
832
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
833
perror("pipe");
834
exitstatus = EXIT_FAILURE;
835
goto fallback;
836
}
1001
837
/* Ask OS to automatic close the pipe on exec */
1002
838
ret = set_cloexec_flag(pipefd[0]);
1003
839
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]);
840
perror("set_cloexec_flag");
841
exitstatus = EXIT_FAILURE;
1009
842
goto fallback;
1010
843
}
1011
844
ret = set_cloexec_flag(pipefd[1]);
1012
845
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]);
846
perror("set_cloexec_flag");
847
exitstatus = EXIT_FAILURE;
1018
848
goto fallback;
1019
849
}
1020
#endif /* not O_CLOEXEC */
1021
850
/* 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));
851
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1025
852
if(ret < 0){
1026
error(0, errno, "sigprocmask");
1027
exitstatus = EX_OSERR;
1028
free(direntries[i]);
853
perror("sigprocmask");
854
exitstatus = EXIT_FAILURE;
1029
855
goto fallback;
1030
856
}
1031
857
/* Starting a new process to be watched */
1032
pid_t pid;
1033
do {
1034
pid = fork();
1035
} while(pid == -1 and errno == EINTR);
858
pid_t pid = fork();
1036
859
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]);
860
perror("fork");
861
exitstatus = EXIT_FAILURE;
1044
862
goto fallback;
1045
863
}
1046
864
if(pid == 0){
1047
865
/* this is the child process */
1048
866
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1049
867
if(ret < 0){
1050
error(0, errno, "sigaction");
1051
_exit(EX_OSERR);
868
perror("sigaction");
869
_exit(EXIT_FAILURE);
1052
870
}
1053
871
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1054
872
if(ret < 0){
1055
error(0, errno, "sigprocmask");
1056
_exit(EX_OSERR);
873
perror("sigprocmask");
874
_exit(EXIT_FAILURE);
1057
875
}
1058
876
1059
877
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1060
878
if(ret == -1){
1061
error(0, errno, "dup2");
1062
_exit(EX_OSERR);
879
perror("dup2");
880
_exit(EXIT_FAILURE);
1063
881
}
1064
882
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);
883
if(dirfd(dir) < 0){
884
/* If dir has no file descriptor, we could not set FD_CLOEXEC
885
above and must now close it manually here. */
886
closedir(dir);
887
}
888
if(p->environ[0] == NULL){
889
if(execv(filename, p->argv) < 0){
890
perror("execv");
891
_exit(EXIT_FAILURE);
892
}
893
} else {
894
if(execve(filename, p->argv, p->environ) < 0){
895
perror("execve");
896
_exit(EXIT_FAILURE);
897
}
1071
898
}
1072
899
/* no return */
1073
900
}
1074
901
/* Parent process */
1075
902
close(pipefd[1]); /* Close unused write end of pipe */
1076
close(plugin_fd);
1077
plugin *new_plugin = getplugin(direntries[i]->d_name);
903
free(filename);
904
plugin *new_plugin = getplugin(dirst->d_name);
1078
905
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)));
906
perror("getplugin");
907
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1083
908
if(ret < 0){
1084
error(0, errno, "sigprocmask");
909
perror("sigprocmask");
1085
910
}
1086
exitstatus = EX_OSERR;
1087
free(direntries[i]);
911
exitstatus = EXIT_FAILURE;
1088
912
goto fallback;
1089
913
}
1090
free(direntries[i]);
1091
914
1092
915
new_plugin->pid = pid;
1093
916
new_plugin->fd = pipefd[0];
1094
917
1095
918
/* Unblock SIGCHLD so signal handler can be run if this process
1096
919
has already completed */
1097
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1098
&sigchld_action.sa_mask,
1099
NULL));
920
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1100
921
if(ret < 0){
1101
error(0, errno, "sigprocmask");
1102
exitstatus = EX_OSERR;
922
perror("sigprocmask");
923
exitstatus = EXIT_FAILURE;
1103
924
goto fallback;
1104
925
}
1105
926
1110
931
}
1111
932
}
1112
933
1113
free(direntries);
1114
direntries = NULL;
1115
close(dir_fd);
1116
dir_fd = -1;
934
closedir(dir);
935
dir = NULL;
1117
936
free_plugin(getplugin(NULL));
1118
937
1119
938
for(plugin *p = plugin_list; p != NULL; p = p->next){
1131
950
while(plugin_list){
1132
951
fd_set rfds = rfds_all;
1133
952
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;
953
if(select_ret == -1){
954
perror("select");
955
exitstatus = EXIT_FAILURE;
1137
956
goto fallback;
1138
957
}
1139
958
/* OK, now either a process completed, or something can be read
1145
964
if(not WIFEXITED(proc->status)
1146
965
or WEXITSTATUS(proc->status) != 0){
1147
966
/* Bad exit by plugin */
1148
967
1149
968
if(debug){
1150
969
if(WIFEXITED(proc->status)){
1151
970
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1154
973
WEXITSTATUS(proc->status));
1155
974
} else if(WIFSIGNALED(proc->status)){
1156
975
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1157
" signal %d: %s\n", proc->name,
976
" signal %d\n", proc->name,
1158
977
(intmax_t) (proc->pid),
1159
WTERMSIG(proc->status),
1160
strsignal(WTERMSIG(proc->status)));
978
WTERMSIG(proc->status));
979
} else if(WCOREDUMP(proc->status)){
980
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
981
" core\n", proc->name, (intmax_t) (proc->pid));
1161
982
}
1162
983
}
1163
984
1164
985
/* Remove the plugin */
1165
986
FD_CLR(proc->fd, &rfds_all);
1166
987
1167
988
/* Block signal while modifying process_list */
1168
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1169
(SIG_BLOCK,
1170
&sigchld_action.sa_mask,
1171
NULL));
989
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1172
990
if(ret < 0){
1173
error(0, errno, "sigprocmask");
1174
exitstatus = EX_OSERR;
991
perror("sigprocmask");
992
exitstatus = EXIT_FAILURE;
1175
993
goto fallback;
1176
994
}
1177
995
1180
998
proc = next_plugin;
1181
999
1182
1000
/* 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)));
1001
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1002
NULL);
1186
1003
if(ret < 0){
1187
error(0, errno, "sigprocmask");
1188
exitstatus = EX_OSERR;
1004
perror("sigprocmask");
1005
exitstatus = EXIT_FAILURE;
1189
1006
goto fallback;
1190
1007
}
1191
1008
1201
1018
bool bret = print_out_password(proc->buffer,
1202
1019
proc->buffer_length);
1203
1020
if(not bret){
1204
error(0, errno, "print_out_password");
1205
exitstatus = EX_IOERR;
1021
perror("print_out_password");
1022
exitstatus = EXIT_FAILURE;
1206
1023
}
1207
1024
goto fallback;
1208
1025
}
1215
1032
}
1216
1033
/* Before reading, make the process' data buffer large enough */
1217
1034
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;
1035
proc->buffer = realloc(proc->buffer, proc->buffer_size
1036
+ (size_t) BUFFER_SIZE);
1037
if(proc->buffer == NULL){
1038
perror("malloc");
1039
exitstatus = EXIT_FAILURE;
1223
1040
goto fallback;
1224
1041
}
1225
proc->buffer = new_buffer;
1226
1042
proc->buffer_size += BUFFER_SIZE;
1227
1043
}
1228
1044
/* Read from the process */
1229
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1230
proc->buffer
1231
+ proc->buffer_length,
1232
BUFFER_SIZE));
1045
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1046
BUFFER_SIZE);
1233
1047
if(sret < 0){
1234
1048
/* Read error from this process; ignore the error */
1235
1049
proc = proc->next;
1243
1057
}
1244
1058
}
1245
1059
}
1246
1247
1060
1061
1248
1062
fallback:
1249
1063
1250
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1251
and exitstatus != EX_OK)){
1064
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1252
1065
/* Fallback if all plugins failed, none are found or an error
1253
1066
occured */
1254
1067
bool bret;
1262
1075
}
1263
1076
bret = print_out_password(passwordbuffer, len);
1264
1077
if(not bret){
1265
error(0, errno, "print_out_password");
1266
exitstatus = EX_IOERR;
1078
perror("print_out_password");
1079
exitstatus = EXIT_FAILURE;
1267
1080
}
1268
1081
}
1269
1082
1270
1083
/* Restore old signal handler */
1271
1084
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1272
1085
if(ret == -1){
1273
error(0, errno, "sigaction");
1274
exitstatus = EX_OSERR;
1086
perror("sigaction");
1087
exitstatus = EXIT_FAILURE;
1275
1088
}
1276
1089
1277
1090
if(custom_argv != NULL){
1281
1094
free(custom_argv);
1282
1095
}
1283
1096
1284
free(direntries);
1285
1286
if(dir_fd != -1){
1287
close(dir_fd);
1097
if(dir != NULL){
1098
closedir(dir);
1288
1099
}
1289
1100
1290
1101
/* Kill the processes */
1294
1105
ret = kill(p->pid, SIGTERM);
1295
1106
if(ret == -1 and errno != ESRCH){
1296
1107
/* Set-uid proccesses might not get closed */
1297
error(0, errno, "kill");
1108
perror("kill");
1298
1109
}
1299
1110
}
1300
1111
}
1301
1112
1302
1113
/* Wait for any remaining child processes to terminate */
1303
do {
1114
do{
1304
1115
ret = wait(NULL);
1305
1116
} while(ret >= 0);
1306
1117
if(errno != ECHILD){
1307
error(0, errno, "wait");
1118
perror("wait");
1308
1119
}
1309
1120
1310
1121
free_plugin_list();
1311
1122
1312
1123
free(plugindir);
1313
free(pluginhelperdir);
1314
1124
free(argfile);
1315
1125
1316
1126
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0