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- Committer: Teddy Hogeborn
- Date: 2016-03-04 20:50:45 UTC
- Revision ID: teddy@recompile.se-20160304205045-jksfb2qzv9erkf21
Only use -fsanitize=... options if they work.
* Makefile (ALL_SANITIZE_OPTIONS): New.
(SANITIZE): Loop through all known sanitizing options and only use
those which do not give an error.
* Makefile (ALL_SANITIZE_OPTIONS): New.
(SANITIZE): Loop through all known sanitizing options and only use
those which do not give an error.
- files added:
- DBUS-API
- debian/source
- debian/upstream
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
plugin-runner.c
1
/* -*- coding: utf-8 -*- */
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 Björn Påhlsson
5
* Copyright © 2008-2016 Teddy Hogeborn
6
* Copyright © 2008-2016 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@fukt.bsnet.se>.
22
* Contact the authors at <mandos@recompile.se>.
23
23
*/
24
24
25
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
asprintf() */
26
O_CLOEXEC, pipe2() */
27
27
#include <stddef.h> /* size_t, NULL */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
EXIT_SUCCESS, realloc() */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
29
realloc() */
30
30
#include <stdbool.h> /* bool, true, false */
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() */
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() */
38
37
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
39
38
FD_SET(), FD_ISSET(), FD_CLR */
40
39
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
WEXITSTATUS() */
42
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
40
WEXITSTATUS(), WTERMSIG(),
41
WCOREDUMP() */
42
#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
43
43
#include <iso646.h> /* and, or, not */
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() */
44
#include <dirent.h> /* struct dirent, scandirat() */
45
#include <unistd.h> /* fcntl(), F_GETFD, F_SETFD,
46
FD_CLOEXEC, write(), STDOUT_FILENO,
47
struct stat, fstat(), close(),
48
setgid(), setuid(), S_ISREG(),
49
faccessat() pipe2(), fork(),
50
_exit(), dup2(), fexecve(), read()
51
*/
53
52
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
54
FD_CLOEXEC */
55
#include <string.h> /* strsep, strlen(), asprintf() */
53
FD_CLOEXEC, openat(), scandirat(),
54
pipe2() */
55
#include <string.h> /* strsep, strlen(), strsignal(),
56
strcmp(), strncmp() */
56
57
#include <errno.h> /* errno */
57
58
#include <argp.h> /* struct argp_option, struct
58
59
argp_state, struct argp,
62
63
#include <signal.h> /* struct sigaction, sigemptyset(),
63
64
sigaddset(), sigaction(),
64
65
sigprocmask(), SIG_BLOCK, SIGCHLD,
65
SIG_UNBLOCK, kill() */
66
SIG_UNBLOCK, kill(), sig_atomic_t
67
*/
66
68
#include <errno.h> /* errno, EBADF */
67
#include <inttypes.h> /* intmax_t, SCNdMAX, PRIdMAX, */
69
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
70
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,
71
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
72
#include <errno.h> /* errno */
73
#include <error.h> /* error() */
74
#include <fnmatch.h> /* fnmatch() */
68
75
69
76
#define BUFFER_SIZE 256
70
77
71
78
#define PDIR "/lib/mandos/plugins.d"
79
#define PHDIR "/lib/mandos/plugin-helpers"
72
80
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
73
81
74
82
const char *argp_program_version = "plugin-runner " VERSION;
75
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
83
const char *argp_program_bug_address = "<mandos@recompile.se>";
76
84
77
85
typedef struct plugin{
78
86
char *name; /* can be NULL or any plugin name */
81
89
char **environ;
82
90
int envc;
83
91
bool disabled;
84
92
85
93
/* Variables used for running processes*/
86
94
pid_t pid;
87
95
int fd;
98
106
99
107
/* Gets an existing plugin based on name,
100
108
or if none is found, creates a new one */
109
__attribute__((warn_unused_result))
101
110
static plugin *getplugin(char *name){
102
/* Check for exiting plugin with that name */
111
/* Check for existing plugin with that name */
103
112
for(plugin *p = plugin_list; p != NULL; p = p->next){
104
113
if((p->name == name)
105
114
or (p->name and name and (strcmp(p->name, name) == 0))){
107
116
}
108
117
}
109
118
/* Create a new plugin */
110
plugin *new_plugin = malloc(sizeof(plugin));
119
plugin *new_plugin = NULL;
120
do {
121
new_plugin = malloc(sizeof(plugin));
122
} while(new_plugin == NULL and errno == EINTR);
111
123
if(new_plugin == NULL){
112
124
return NULL;
113
125
}
114
126
char *copy_name = NULL;
115
127
if(name != NULL){
116
copy_name = strdup(name);
128
do {
129
copy_name = strdup(name);
130
} while(copy_name == NULL and errno == EINTR);
117
131
if(copy_name == NULL){
132
int e = errno;
118
133
free(new_plugin);
134
errno = e;
119
135
return NULL;
120
136
}
121
137
}
125
141
.disabled = false,
126
142
.next = plugin_list };
127
143
128
new_plugin->argv = malloc(sizeof(char *) * 2);
144
do {
145
new_plugin->argv = malloc(sizeof(char *) * 2);
146
} while(new_plugin->argv == NULL and errno == EINTR);
129
147
if(new_plugin->argv == NULL){
148
int e = errno;
130
149
free(copy_name);
131
150
free(new_plugin);
151
errno = e;
132
152
return NULL;
133
153
}
134
154
new_plugin->argv[0] = copy_name;
135
155
new_plugin->argv[1] = NULL;
136
156
137
new_plugin->environ = malloc(sizeof(char *));
157
do {
158
new_plugin->environ = malloc(sizeof(char *));
159
} while(new_plugin->environ == NULL and errno == EINTR);
138
160
if(new_plugin->environ == NULL){
161
int e = errno;
139
162
free(copy_name);
140
163
free(new_plugin->argv);
141
164
free(new_plugin);
165
errno = e;
142
166
return NULL;
143
167
}
144
168
new_plugin->environ[0] = NULL;
149
173
}
150
174
151
175
/* Helper function for add_argument and add_environment */
176
__attribute__((nonnull, warn_unused_result))
152
177
static bool add_to_char_array(const char *new, char ***array,
153
178
int *len){
154
179
/* Resize the pointed-to array to hold one more pointer */
155
*array = realloc(*array, sizeof(char *)
156
* (size_t) ((*len) + 2));
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);
157
185
/* Malloc check */
158
if(*array == NULL){
186
if(new_array == NULL){
159
187
return false;
160
188
}
189
*array = new_array;
161
190
/* Make a copy of the new string */
162
char *copy = strdup(new);
191
char *copy;
192
do {
193
copy = strdup(new);
194
} while(copy == NULL and errno == EINTR);
163
195
if(copy == NULL){
164
196
return false;
165
197
}
172
204
}
173
205
174
206
/* Add to a plugin's argument vector */
207
__attribute__((nonnull(2), warn_unused_result))
175
208
static bool add_argument(plugin *p, const char *arg){
176
209
if(p == NULL){
177
210
return false;
180
213
}
181
214
182
215
/* Add to a plugin's environment */
216
__attribute__((nonnull(2), warn_unused_result))
183
217
static bool add_environment(plugin *p, const char *def, bool replace){
184
218
if(p == NULL){
185
219
return false;
187
221
/* namelen = length of name of environment variable */
188
222
size_t namelen = (size_t)(strchrnul(def, '=') - def);
189
223
/* Search for this environment variable */
190
for(char **e = p->environ; *e != NULL; e++){
191
if(strncmp(*e, def, namelen + 1) == 0){
224
for(char **envdef = p->environ; *envdef != NULL; envdef++){
225
if(strncmp(*envdef, def, namelen + 1) == 0){
192
226
/* It already exists */
193
227
if(replace){
194
char *new = realloc(*e, strlen(def) + 1);
195
if(new == NULL){
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){
196
233
return false;
197
234
}
198
*e = new;
199
strcpy(*e, def);
235
*envdef = new_envdef;
236
strcpy(*envdef, def);
200
237
}
201
238
return true;
202
239
}
204
241
return add_to_char_array(def, &(p->environ), &(p->envc));
205
242
}
206
243
244
#ifndef O_CLOEXEC
207
245
/*
208
246
* Based on the example in the GNU LibC manual chapter 13.13 "File
209
247
* Descriptor Flags".
210
* *Note File Descriptor Flags:(libc)Descriptor Flags.
248
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
211
249
*/
250
__attribute__((warn_unused_result))
212
251
static int set_cloexec_flag(int fd){
213
int ret = fcntl(fd, F_GETFD, 0);
252
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
214
253
/* If reading the flags failed, return error indication now. */
215
254
if(ret < 0){
216
255
return ret;
217
256
}
218
257
/* Store modified flag word in the descriptor. */
219
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
258
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
259
ret | FD_CLOEXEC));
220
260
}
261
#endif /* not O_CLOEXEC */
221
262
222
263
223
264
/* Mark processes as completed when they exit, and save their exit
237
278
/* No child processes */
238
279
break;
239
280
}
240
perror("waitpid");
281
error(0, errno, "waitpid");
241
282
}
242
283
243
284
/* A child exited, find it in process_list */
255
296
}
256
297
257
298
/* Prints out a password to stdout */
299
__attribute__((nonnull, warn_unused_result))
258
300
static bool print_out_password(const char *buffer, size_t length){
259
301
ssize_t ret;
260
302
for(size_t written = 0; written < length; written += (size_t)ret){
268
310
}
269
311
270
312
/* Removes and free a plugin from the plugin list */
313
__attribute__((nonnull))
271
314
static void free_plugin(plugin *plugin_node){
272
315
273
316
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
279
322
}
280
323
free(plugin_node->environ);
281
324
free(plugin_node->buffer);
282
325
283
326
/* Removes the plugin from the singly-linked list */
284
327
if(plugin_node == plugin_list){
285
328
/* First one - simple */
305
348
306
349
int main(int argc, char *argv[]){
307
350
char *plugindir = NULL;
351
char *pluginhelperdir = NULL;
308
352
char *argfile = NULL;
309
353
FILE *conffp;
310
size_t d_name_len;
311
DIR *dir = NULL;
312
struct dirent *dirst;
354
struct dirent **direntries = NULL;
313
355
struct stat st;
314
356
fd_set rfds_all;
315
int ret, numchars, maxfd = 0;
357
int ret, maxfd = 0;
316
358
ssize_t sret;
317
intmax_t tmpmax;
318
359
uid_t uid = 65534;
319
360
gid_t gid = 65534;
320
361
bool debug = false;
324
365
.sa_flags = SA_NOCLDSTOP };
325
366
char **custom_argv = NULL;
326
367
int custom_argc = 0;
368
int dir_fd = -1;
327
369
328
370
/* Establish a signal handler */
329
371
sigemptyset(&sigchld_action.sa_mask);
330
372
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
331
373
if(ret == -1){
332
perror("sigaddset");
333
exitstatus = EXIT_FAILURE;
374
error(0, errno, "sigaddset");
375
exitstatus = EX_OSERR;
334
376
goto fallback;
335
377
}
336
378
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
337
379
if(ret == -1){
338
perror("sigaction");
339
exitstatus = EXIT_FAILURE;
380
error(0, errno, "sigaction");
381
exitstatus = EX_OSERR;
340
382
goto fallback;
341
383
}
342
384
374
416
.doc = "Group ID the plugins will run as", .group = 3 },
375
417
{ .name = "debug", .key = 132,
376
418
.doc = "Debug mode", .group = 4 },
419
{ .name = "plugin-helper-dir", .key = 133,
420
.arg = "DIRECTORY",
421
.doc = "Specify a different plugin helper directory",
422
.group = 2 },
423
/*
424
* These reproduce what we would get without ARGP_NO_HELP
425
*/
426
{ .name = "help", .key = '?',
427
.doc = "Give this help list", .group = -1 },
428
{ .name = "usage", .key = -3,
429
.doc = "Give a short usage message", .group = -1 },
430
{ .name = "version", .key = 'V',
431
.doc = "Print program version", .group = -1 },
377
432
{ .name = NULL }
378
433
};
379
434
380
error_t parse_opt(int key, char *arg, __attribute__((unused))
381
struct argp_state *state){
435
__attribute__((nonnull(3)))
436
error_t parse_opt(int key, char *arg, struct argp_state *state){
437
errno = 0;
382
438
switch(key){
439
char *tmp;
440
intmax_t tmp_id;
383
441
case 'g': /* --global-options */
384
if(arg != NULL){
385
char *p;
386
while((p = strsep(&arg, ",")) != NULL){
387
if(p[0] == '\0'){
388
continue;
389
}
390
if(not add_argument(getplugin(NULL), p)){
391
perror("add_argument");
392
return ARGP_ERR_UNKNOWN;
442
{
443
char *plugin_option;
444
while((plugin_option = strsep(&arg, ",")) != NULL){
445
if(not add_argument(getplugin(NULL), plugin_option)){
446
break;
393
447
}
394
448
}
449
errno = 0;
395
450
}
396
451
break;
397
452
case 'G': /* --global-env */
398
if(arg == NULL){
399
break;
400
}
401
if(not add_environment(getplugin(NULL), arg, true)){
402
perror("add_environment");
453
if(add_environment(getplugin(NULL), arg, true)){
454
errno = 0;
403
455
}
404
456
break;
405
457
case 'o': /* --options-for */
406
if(arg != NULL){
407
char *p_name = strsep(&arg, ":");
408
if(p_name[0] == '\0' or arg == NULL){
409
break;
410
}
411
char *opt = strsep(&arg, ":");
412
if(opt[0] == '\0' or opt == NULL){
413
break;
414
}
415
char *p;
416
while((p = strsep(&opt, ",")) != NULL){
417
if(p[0] == '\0'){
418
continue;
419
}
420
if(not add_argument(getplugin(p_name), p)){
421
perror("add_argument");
422
return ARGP_ERR_UNKNOWN;
423
}
424
}
458
{
459
char *option_list = strchr(arg, ':');
460
if(option_list == NULL){
461
argp_error(state, "No colon in \"%s\"", arg);
462
errno = EINVAL;
463
break;
464
}
465
*option_list = '\0';
466
option_list++;
467
if(arg[0] == '\0'){
468
argp_error(state, "Empty plugin name");
469
errno = EINVAL;
470
break;
471
}
472
char *option;
473
while((option = strsep(&option_list, ",")) != NULL){
474
if(not add_argument(getplugin(arg), option)){
475
break;
476
}
477
}
478
errno = 0;
425
479
}
426
480
break;
427
481
case 'E': /* --env-for */
428
if(arg == NULL){
429
break;
430
}
431
482
{
432
483
char *envdef = strchr(arg, ':');
433
484
if(envdef == NULL){
485
argp_error(state, "No colon in \"%s\"", arg);
486
errno = EINVAL;
434
487
break;
435
488
}
436
489
*envdef = '\0';
437
if(not add_environment(getplugin(arg), envdef+1, true)){
438
perror("add_environment");
490
envdef++;
491
if(arg[0] == '\0'){
492
argp_error(state, "Empty plugin name");
493
errno = EINVAL;
494
break;
495
}
496
if(add_environment(getplugin(arg), envdef, true)){
497
errno = 0;
439
498
}
440
499
}
441
500
break;
442
501
case 'd': /* --disable */
443
if(arg != NULL){
502
{
444
503
plugin *p = getplugin(arg);
445
if(p == NULL){
446
return ARGP_ERR_UNKNOWN;
504
if(p != NULL){
505
p->disabled = true;
506
errno = 0;
447
507
}
448
p->disabled = true;
449
508
}
450
509
break;
451
510
case 'e': /* --enable */
452
if(arg != NULL){
511
{
453
512
plugin *p = getplugin(arg);
454
if(p == NULL){
455
return ARGP_ERR_UNKNOWN;
513
if(p != NULL){
514
p->disabled = false;
515
errno = 0;
456
516
}
457
p->disabled = false;
458
517
}
459
518
break;
460
519
case 128: /* --plugin-dir */
461
520
free(plugindir);
462
521
plugindir = strdup(arg);
463
if(plugindir == NULL){
464
perror("strdup");
465
}
522
if(plugindir != NULL){
523
errno = 0;
524
}
466
525
break;
467
526
case 129: /* --config-file */
468
527
/* This is already done by parse_opt_config_file() */
469
528
break;
470
529
case 130: /* --userid */
471
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
472
if(ret < 1 or tmpmax != (uid_t)tmpmax
473
or arg[numchars] != '\0'){
474
fprintf(stderr, "Bad user ID number: \"%s\", using %"
475
PRIdMAX "\n", arg, (intmax_t)uid);
476
} else {
477
uid = (uid_t)tmpmax;
530
tmp_id = strtoimax(arg, &tmp, 10);
531
if(errno != 0 or tmp == arg or *tmp != '\0'
532
or tmp_id != (uid_t)tmp_id){
533
argp_error(state, "Bad user ID number: \"%s\", using %"
534
PRIdMAX, arg, (intmax_t)uid);
535
break;
478
536
}
537
uid = (uid_t)tmp_id;
538
errno = 0;
479
539
break;
480
540
case 131: /* --groupid */
481
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
482
if(ret < 1 or tmpmax != (gid_t)tmpmax
483
or arg[numchars] != '\0'){
484
fprintf(stderr, "Bad group ID number: \"%s\", using %"
485
PRIdMAX "\n", arg, (intmax_t)gid);
486
} else {
487
gid = (gid_t)tmpmax;
541
tmp_id = strtoimax(arg, &tmp, 10);
542
if(errno != 0 or tmp == arg or *tmp != '\0'
543
or tmp_id != (gid_t)tmp_id){
544
argp_error(state, "Bad group ID number: \"%s\", using %"
545
PRIdMAX, arg, (intmax_t)gid);
546
break;
488
547
}
548
gid = (gid_t)tmp_id;
549
errno = 0;
489
550
break;
490
551
case 132: /* --debug */
491
552
debug = true;
492
553
break;
554
case 133: /* --plugin-helper-dir */
555
free(pluginhelperdir);
556
pluginhelperdir = strdup(arg);
557
if(pluginhelperdir != NULL){
558
errno = 0;
559
}
560
break;
561
/*
562
* These reproduce what we would get without ARGP_NO_HELP
563
*/
564
case '?': /* --help */
565
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
566
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
567
case -3: /* --usage */
568
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
569
argp_state_help(state, state->out_stream,
570
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
571
case 'V': /* --version */
572
fprintf(state->out_stream, "%s\n", argp_program_version);
573
exit(EXIT_SUCCESS);
574
break;
493
575
/*
494
576
* When adding more options before this line, remember to also add a
495
577
* "case" to the "parse_opt_config_file" function below.
498
580
/* Cryptsetup always passes an argument, which is an empty
499
581
string if "none" was specified in /etc/crypttab. So if
500
582
argument was empty, we ignore it silently. */
501
if(arg[0] != '\0'){
502
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
583
if(arg[0] == '\0'){
584
break;
503
585
}
504
break;
505
case ARGP_KEY_END:
506
break;
507
586
default:
508
587
return ARGP_ERR_UNKNOWN;
509
588
}
510
return 0;
589
return errno; /* Set to 0 at start */
511
590
}
512
591
513
592
/* This option parser is the same as parse_opt() above, except it
515
594
error_t parse_opt_config_file(int key, char *arg,
516
595
__attribute__((unused))
517
596
struct argp_state *state){
597
errno = 0;
518
598
switch(key){
519
599
case 'g': /* --global-options */
520
600
case 'G': /* --global-env */
527
607
case 129: /* --config-file */
528
608
free(argfile);
529
609
argfile = strdup(arg);
530
if(argfile == NULL){
531
perror("strdup");
610
if(argfile != NULL){
611
errno = 0;
532
612
}
533
break;
613
break;
534
614
case 130: /* --userid */
535
615
case 131: /* --groupid */
536
616
case 132: /* --debug */
617
case 133: /* --plugin-helper-dir */
618
case '?': /* --help */
619
case -3: /* --usage */
620
case 'V': /* --version */
537
621
case ARGP_KEY_ARG:
538
case ARGP_KEY_END:
539
622
break;
540
623
default:
541
624
return ARGP_ERR_UNKNOWN;
542
625
}
543
return 0;
626
return errno;
544
627
}
545
628
546
629
struct argp argp = { .options = options,
550
633
551
634
/* Parse using parse_opt_config_file() in order to get the custom
552
635
config file location, if any. */
553
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
554
if(ret == ARGP_ERR_UNKNOWN){
555
fprintf(stderr, "Unknown error while parsing arguments\n");
556
exitstatus = EXIT_FAILURE;
636
ret = argp_parse(&argp, argc, argv,
637
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
638
NULL, NULL);
639
switch(ret){
640
case 0:
641
break;
642
case ENOMEM:
643
default:
644
errno = ret;
645
error(0, errno, "argp_parse");
646
exitstatus = EX_OSERR;
647
goto fallback;
648
case EINVAL:
649
exitstatus = EX_USAGE;
557
650
goto fallback;
558
651
}
559
652
565
658
conffp = fopen(AFILE, "r");
566
659
} else {
567
660
conffp = fopen(argfile, "r");
568
}
661
}
569
662
if(conffp != NULL){
570
663
char *org_line = NULL;
571
664
char *p, *arg, *new_arg, *line;
572
665
size_t size = 0;
573
666
const char whitespace_delims[] = " \r\t\f\v\n";
574
667
const char comment_delim[] = "#";
575
668
576
669
custom_argc = 1;
577
670
custom_argv = malloc(sizeof(char*) * 2);
578
671
if(custom_argv == NULL){
579
perror("malloc");
580
exitstatus = EXIT_FAILURE;
672
error(0, errno, "malloc");
673
exitstatus = EX_OSERR;
581
674
goto fallback;
582
675
}
583
676
custom_argv[0] = argv[0];
584
677
custom_argv[1] = NULL;
585
678
586
679
/* for each line in the config file, strip whitespace and ignore
587
680
commented text */
588
681
while(true){
590
683
if(sret == -1){
591
684
break;
592
685
}
593
686
594
687
line = org_line;
595
688
arg = strsep(&line, comment_delim);
596
689
while((p = strsep(&arg, whitespace_delims)) != NULL){
599
692
}
600
693
new_arg = strdup(p);
601
694
if(new_arg == NULL){
602
perror("strdup");
603
exitstatus = EXIT_FAILURE;
695
error(0, errno, "strdup");
696
exitstatus = EX_OSERR;
604
697
free(org_line);
605
698
goto fallback;
606
699
}
607
700
608
701
custom_argc += 1;
609
custom_argv = realloc(custom_argv, sizeof(char *)
610
* ((unsigned int) custom_argc + 1));
611
if(custom_argv == NULL){
612
perror("realloc");
613
exitstatus = EXIT_FAILURE;
614
free(org_line);
615
goto fallback;
702
{
703
char **new_argv = realloc(custom_argv, sizeof(char *)
704
* ((size_t)custom_argc + 1));
705
if(new_argv == NULL){
706
error(0, errno, "realloc");
707
exitstatus = EX_OSERR;
708
free(new_arg);
709
free(org_line);
710
goto fallback;
711
} else {
712
custom_argv = new_argv;
713
}
616
714
}
617
715
custom_argv[custom_argc-1] = new_arg;
618
custom_argv[custom_argc] = NULL;
716
custom_argv[custom_argc] = NULL;
619
717
}
620
718
}
719
do {
720
ret = fclose(conffp);
721
} while(ret == EOF and errno == EINTR);
722
if(ret == EOF){
723
error(0, errno, "fclose");
724
exitstatus = EX_IOERR;
725
goto fallback;
726
}
621
727
free(org_line);
622
728
} else {
623
729
/* Check for harmful errors and go to fallback. Other errors might
624
730
not affect opening plugins */
625
731
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
626
perror("fopen");
627
exitstatus = EXIT_FAILURE;
732
error(0, errno, "fopen");
733
exitstatus = EX_OSERR;
628
734
goto fallback;
629
735
}
630
736
}
631
/* If there was any arguments from configuration file,
632
pass them to parser as command arguments */
737
/* If there were any arguments from the configuration file, pass
738
them to parser as command line arguments */
633
739
if(custom_argv != NULL){
634
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
635
0, NULL);
636
if(ret == ARGP_ERR_UNKNOWN){
637
fprintf(stderr, "Unknown error while parsing arguments\n");
638
exitstatus = EXIT_FAILURE;
740
ret = argp_parse(&argp, custom_argc, custom_argv,
741
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
742
NULL, NULL);
743
switch(ret){
744
case 0:
745
break;
746
case ENOMEM:
747
default:
748
errno = ret;
749
error(0, errno, "argp_parse");
750
exitstatus = EX_OSERR;
751
goto fallback;
752
case EINVAL:
753
exitstatus = EX_CONFIG;
639
754
goto fallback;
640
755
}
641
756
}
642
757
643
758
/* Parse actual command line arguments, to let them override the
644
759
config file */
645
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
646
if(ret == ARGP_ERR_UNKNOWN){
647
fprintf(stderr, "Unknown error while parsing arguments\n");
648
exitstatus = EXIT_FAILURE;
649
goto fallback;
760
ret = argp_parse(&argp, argc, argv,
761
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
762
NULL, NULL);
763
switch(ret){
764
case 0:
765
break;
766
case ENOMEM:
767
default:
768
errno = ret;
769
error(0, errno, "argp_parse");
770
exitstatus = EX_OSERR;
771
goto fallback;
772
case EINVAL:
773
exitstatus = EX_USAGE;
774
goto fallback;
775
}
776
777
{
778
char *pluginhelperenv;
779
bool bret = true;
780
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
781
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
782
if(ret != -1){
783
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
784
}
785
if(ret == -1 or not bret){
786
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
787
" environment variable to \"%s\" for all plugins\n",
788
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
789
}
790
if(ret != -1){
791
free(pluginhelperenv);
792
}
650
793
}
651
794
652
795
if(debug){
663
806
}
664
807
}
665
808
666
/* Strip permissions down to nobody */
667
setgid(gid);
809
if(getuid() == 0){
810
/* Work around Debian bug #633582:
811
<http://bugs.debian.org/633582> */
812
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
813
if(plugindir_fd == -1){
814
if(errno != ENOENT){
815
error(0, errno, "open(\"" PDIR "\")");
816
}
817
} else {
818
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
819
if(ret == -1){
820
error(0, errno, "fstat");
821
} else {
822
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
823
ret = fchown(plugindir_fd, uid, gid);
824
if(ret == -1){
825
error(0, errno, "fchown");
826
}
827
}
828
}
829
close(plugindir_fd);
830
}
831
}
832
833
/* Lower permissions */
834
ret = setgid(gid);
668
835
if(ret == -1){
669
perror("setgid");
836
error(0, errno, "setgid");
670
837
}
671
838
ret = setuid(uid);
672
839
if(ret == -1){
673
perror("setuid");
674
}
675
676
if(plugindir == NULL){
677
dir = opendir(PDIR);
678
} else {
679
dir = opendir(plugindir);
680
}
681
682
if(dir == NULL){
683
perror("Could not open plugin dir");
684
exitstatus = EXIT_FAILURE;
685
goto fallback;
686
}
687
688
/* Set the FD_CLOEXEC flag on the directory, if possible */
840
error(0, errno, "setuid");
841
}
842
843
/* Open plugin directory with close_on_exec flag */
689
844
{
690
int dir_fd = dirfd(dir);
691
if(dir_fd >= 0){
692
ret = set_cloexec_flag(dir_fd);
693
if(ret < 0){
694
perror("set_cloexec_flag");
695
exitstatus = EXIT_FAILURE;
696
goto fallback;
845
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
846
#ifdef O_CLOEXEC
847
O_CLOEXEC
848
#else /* not O_CLOEXEC */
849
0
850
#endif /* not O_CLOEXEC */
851
);
852
if(dir_fd == -1){
853
error(0, errno, "Could not open plugin dir");
854
exitstatus = EX_UNAVAILABLE;
855
goto fallback;
856
}
857
858
#ifndef O_CLOEXEC
859
/* Set the FD_CLOEXEC flag on the directory */
860
ret = set_cloexec_flag(dir_fd);
861
if(ret < 0){
862
error(0, errno, "set_cloexec_flag");
863
exitstatus = EX_OSERR;
864
goto fallback;
865
}
866
#endif /* O_CLOEXEC */
867
}
868
869
int good_name(const struct dirent * const dirent){
870
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
871
"*.dpkg-old", "*.dpkg-bak",
872
"*.dpkg-divert", NULL };
873
#ifdef __GNUC__
874
#pragma GCC diagnostic push
875
#pragma GCC diagnostic ignored "-Wcast-qual"
876
#endif
877
for(const char **pat = (const char **)patterns;
878
*pat != NULL; pat++){
879
#ifdef __GNUC__
880
#pragma GCC diagnostic pop
881
#endif
882
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
883
!= FNM_NOMATCH){
884
if(debug){
885
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
886
" matching pattern %s\n", dirent->d_name, *pat);
887
}
888
return 0;
697
889
}
698
890
}
891
return 1;
892
}
893
894
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
895
alphasort);
896
if(numplugins == -1){
897
error(0, errno, "Could not scan plugin dir");
898
direntries = NULL;
899
exitstatus = EX_OSERR;
900
goto fallback;
699
901
}
700
902
701
903
FD_ZERO(&rfds_all);
702
904
703
905
/* Read and execute any executable in the plugin directory*/
704
while(true){
705
dirst = readdir(dir);
706
707
/* All directory entries have been processed */
708
if(dirst == NULL){
709
if(errno == EBADF){
710
perror("readdir");
711
exitstatus = EXIT_FAILURE;
712
goto fallback;
713
}
714
break;
715
}
716
717
d_name_len = strlen(dirst->d_name);
718
719
/* Ignore dotfiles, backup files and other junk */
720
{
721
bool bad_name = false;
722
723
const char const *bad_prefixes[] = { ".", "#", NULL };
724
725
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
726
".dpkg-old",
727
".dpkg-bak",
728
".dpkg-divert", NULL };
729
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
730
size_t pre_len = strlen(*pre);
731
if((d_name_len >= pre_len)
732
and strncmp((dirst->d_name), *pre, pre_len) == 0){
733
if(debug){
734
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
735
" with bad prefix %s\n", dirst->d_name, *pre);
736
}
737
bad_name = true;
738
break;
739
}
740
}
741
if(bad_name){
742
continue;
743
}
744
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
745
size_t suf_len = strlen(*suf);
746
if((d_name_len >= suf_len)
747
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
748
== 0)){
749
if(debug){
750
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
751
" with bad suffix %s\n", dirst->d_name, *suf);
752
}
753
bad_name = true;
754
break;
755
}
756
}
757
758
if(bad_name){
759
continue;
760
}
761
}
762
763
char *filename;
764
if(plugindir == NULL){
765
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
766
} else {
767
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
768
}
769
if(ret < 0){
770
perror("asprintf");
906
for(int i = 0; i < numplugins; i++){
907
908
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
909
if(plugin_fd == -1){
910
error(0, errno, "Could not open plugin");
911
free(direntries[i]);
771
912
continue;
772
913
}
773
774
ret = stat(filename, &st);
914
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
775
915
if(ret == -1){
776
perror("stat");
777
free(filename);
916
error(0, errno, "stat");
917
close(plugin_fd);
918
free(direntries[i]);
778
919
continue;
779
920
}
780
921
781
922
/* Ignore non-executable files */
782
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
923
if(not S_ISREG(st.st_mode)
924
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
925
X_OK, 0)) != 0)){
783
926
if(debug){
784
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
785
" with bad type or mode\n", filename);
927
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
928
" with bad type or mode\n",
929
plugindir != NULL ? plugindir : PDIR,
930
direntries[i]->d_name);
786
931
}
787
free(filename);
932
close(plugin_fd);
933
free(direntries[i]);
788
934
continue;
789
935
}
790
936
791
plugin *p = getplugin(dirst->d_name);
937
plugin *p = getplugin(direntries[i]->d_name);
792
938
if(p == NULL){
793
perror("getplugin");
794
free(filename);
939
error(0, errno, "getplugin");
940
close(plugin_fd);
941
free(direntries[i]);
795
942
continue;
796
943
}
797
944
if(p->disabled){
798
945
if(debug){
799
946
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
800
dirst->d_name);
947
direntries[i]->d_name);
801
948
}
802
free(filename);
949
close(plugin_fd);
950
free(direntries[i]);
803
951
continue;
804
952
}
805
953
{
808
956
if(g != NULL){
809
957
for(char **a = g->argv + 1; *a != NULL; a++){
810
958
if(not add_argument(p, *a)){
811
perror("add_argument");
959
error(0, errno, "add_argument");
812
960
}
813
961
}
814
962
/* Add global environment variables */
815
963
for(char **e = g->environ; *e != NULL; e++){
816
964
if(not add_environment(p, *e, false)){
817
perror("add_environment");
965
error(0, errno, "add_environment");
818
966
}
819
967
}
820
968
}
821
969
}
822
/* If this plugin has any environment variables, we will call
823
using execve and need to duplicate the environment from this
824
process, too. */
970
/* If this plugin has any environment variables, we need to
971
duplicate the environment from this process, too. */
825
972
if(p->environ[0] != NULL){
826
973
for(char **e = environ; *e != NULL; e++){
827
974
if(not add_environment(p, *e, false)){
828
perror("add_environment");
975
error(0, errno, "add_environment");
829
976
}
830
977
}
831
978
}
832
979
833
980
int pipefd[2];
834
ret = pipe(pipefd);
981
#ifndef O_CLOEXEC
982
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
983
#else /* O_CLOEXEC */
984
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
985
#endif /* O_CLOEXEC */
835
986
if(ret == -1){
836
perror("pipe");
837
exitstatus = EXIT_FAILURE;
838
goto fallback;
839
}
987
error(0, errno, "pipe");
988
exitstatus = EX_OSERR;
989
free(direntries[i]);
990
goto fallback;
991
}
992
if(pipefd[0] >= FD_SETSIZE){
993
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
994
FD_SETSIZE);
995
close(pipefd[0]);
996
close(pipefd[1]);
997
exitstatus = EX_OSERR;
998
free(direntries[i]);
999
goto fallback;
1000
}
1001
#ifndef O_CLOEXEC
840
1002
/* Ask OS to automatic close the pipe on exec */
841
1003
ret = set_cloexec_flag(pipefd[0]);
842
1004
if(ret < 0){
843
perror("set_cloexec_flag");
844
exitstatus = EXIT_FAILURE;
1005
error(0, errno, "set_cloexec_flag");
1006
close(pipefd[0]);
1007
close(pipefd[1]);
1008
exitstatus = EX_OSERR;
1009
free(direntries[i]);
845
1010
goto fallback;
846
1011
}
847
1012
ret = set_cloexec_flag(pipefd[1]);
848
1013
if(ret < 0){
849
perror("set_cloexec_flag");
850
exitstatus = EXIT_FAILURE;
1014
error(0, errno, "set_cloexec_flag");
1015
close(pipefd[0]);
1016
close(pipefd[1]);
1017
exitstatus = EX_OSERR;
1018
free(direntries[i]);
851
1019
goto fallback;
852
1020
}
1021
#endif /* not O_CLOEXEC */
853
1022
/* Block SIGCHLD until process is safely in process list */
854
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1023
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1024
&sigchld_action.sa_mask,
1025
NULL));
855
1026
if(ret < 0){
856
perror("sigprocmask");
857
exitstatus = EXIT_FAILURE;
1027
error(0, errno, "sigprocmask");
1028
exitstatus = EX_OSERR;
1029
free(direntries[i]);
858
1030
goto fallback;
859
1031
}
860
1032
/* Starting a new process to be watched */
861
pid_t pid = fork();
1033
pid_t pid;
1034
do {
1035
pid = fork();
1036
} while(pid == -1 and errno == EINTR);
862
1037
if(pid == -1){
863
perror("fork");
864
exitstatus = EXIT_FAILURE;
1038
error(0, errno, "fork");
1039
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1040
&sigchld_action.sa_mask, NULL));
1041
close(pipefd[0]);
1042
close(pipefd[1]);
1043
exitstatus = EX_OSERR;
1044
free(direntries[i]);
865
1045
goto fallback;
866
1046
}
867
1047
if(pid == 0){
868
1048
/* this is the child process */
869
1049
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
870
1050
if(ret < 0){
871
perror("sigaction");
872
_exit(EXIT_FAILURE);
1051
error(0, errno, "sigaction");
1052
_exit(EX_OSERR);
873
1053
}
874
1054
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
875
1055
if(ret < 0){
876
perror("sigprocmask");
877
_exit(EXIT_FAILURE);
1056
error(0, errno, "sigprocmask");
1057
_exit(EX_OSERR);
878
1058
}
879
1059
880
1060
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
881
1061
if(ret == -1){
882
perror("dup2");
883
_exit(EXIT_FAILURE);
1062
error(0, errno, "dup2");
1063
_exit(EX_OSERR);
884
1064
}
885
1065
886
if(dirfd(dir) < 0){
887
/* If dir has no file descriptor, we could not set FD_CLOEXEC
888
above and must now close it manually here. */
889
closedir(dir);
890
}
891
if(p->environ[0] == NULL){
892
if(execv(filename, p->argv) < 0){
893
perror("execv");
894
_exit(EXIT_FAILURE);
895
}
896
} else {
897
if(execve(filename, p->argv, p->environ) < 0){
898
perror("execve");
899
_exit(EXIT_FAILURE);
900
}
1066
if(fexecve(plugin_fd, p->argv,
1067
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1068
error(0, errno, "fexecve for %s/%s",
1069
plugindir != NULL ? plugindir : PDIR,
1070
direntries[i]->d_name);
1071
_exit(EX_OSERR);
901
1072
}
902
1073
/* no return */
903
1074
}
904
1075
/* Parent process */
905
1076
close(pipefd[1]); /* Close unused write end of pipe */
906
free(filename);
907
plugin *new_plugin = getplugin(dirst->d_name);
1077
close(plugin_fd);
1078
plugin *new_plugin = getplugin(direntries[i]->d_name);
908
1079
if(new_plugin == NULL){
909
perror("getplugin");
910
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1080
error(0, errno, "getplugin");
1081
ret = (int)(TEMP_FAILURE_RETRY
1082
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1083
NULL)));
911
1084
if(ret < 0){
912
perror("sigprocmask");
1085
error(0, errno, "sigprocmask");
913
1086
}
914
exitstatus = EXIT_FAILURE;
1087
exitstatus = EX_OSERR;
1088
free(direntries[i]);
915
1089
goto fallback;
916
1090
}
1091
free(direntries[i]);
917
1092
918
1093
new_plugin->pid = pid;
919
1094
new_plugin->fd = pipefd[0];
920
1095
921
1096
/* Unblock SIGCHLD so signal handler can be run if this process
922
1097
has already completed */
923
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1098
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1099
&sigchld_action.sa_mask,
1100
NULL));
924
1101
if(ret < 0){
925
perror("sigprocmask");
926
exitstatus = EXIT_FAILURE;
1102
error(0, errno, "sigprocmask");
1103
exitstatus = EX_OSERR;
927
1104
goto fallback;
928
1105
}
929
1106
934
1111
}
935
1112
}
936
1113
937
closedir(dir);
938
dir = NULL;
1114
free(direntries);
1115
direntries = NULL;
1116
close(dir_fd);
1117
dir_fd = -1;
1118
free_plugin(getplugin(NULL));
939
1119
940
1120
for(plugin *p = plugin_list; p != NULL; p = p->next){
941
1121
if(p->pid != 0){
952
1132
while(plugin_list){
953
1133
fd_set rfds = rfds_all;
954
1134
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
955
if(select_ret == -1){
956
perror("select");
957
exitstatus = EXIT_FAILURE;
1135
if(select_ret == -1 and errno != EINTR){
1136
error(0, errno, "select");
1137
exitstatus = EX_OSERR;
958
1138
goto fallback;
959
1139
}
960
1140
/* OK, now either a process completed, or something can be read
966
1146
if(not WIFEXITED(proc->status)
967
1147
or WEXITSTATUS(proc->status) != 0){
968
1148
/* Bad exit by plugin */
969
1149
970
1150
if(debug){
971
1151
if(WIFEXITED(proc->status)){
972
1152
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
975
1155
WEXITSTATUS(proc->status));
976
1156
} else if(WIFSIGNALED(proc->status)){
977
1157
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
978
" signal %d\n", proc->name,
1158
" signal %d: %s\n", proc->name,
979
1159
(intmax_t) (proc->pid),
980
WTERMSIG(proc->status));
1160
WTERMSIG(proc->status),
1161
strsignal(WTERMSIG(proc->status)));
981
1162
} else if(WCOREDUMP(proc->status)){
982
1163
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
983
1164
" core\n", proc->name, (intmax_t) (proc->pid));
986
1167
987
1168
/* Remove the plugin */
988
1169
FD_CLR(proc->fd, &rfds_all);
989
1170
990
1171
/* Block signal while modifying process_list */
991
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1172
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1173
(SIG_BLOCK,
1174
&sigchld_action.sa_mask,
1175
NULL));
992
1176
if(ret < 0){
993
perror("sigprocmask");
994
exitstatus = EXIT_FAILURE;
1177
error(0, errno, "sigprocmask");
1178
exitstatus = EX_OSERR;
995
1179
goto fallback;
996
1180
}
997
1181
1000
1184
proc = next_plugin;
1001
1185
1002
1186
/* We are done modifying process list, so unblock signal */
1003
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1004
NULL);
1187
ret = (int)(TEMP_FAILURE_RETRY
1188
(sigprocmask(SIG_UNBLOCK,
1189
&sigchld_action.sa_mask, NULL)));
1005
1190
if(ret < 0){
1006
perror("sigprocmask");
1007
exitstatus = EXIT_FAILURE;
1191
error(0, errno, "sigprocmask");
1192
exitstatus = EX_OSERR;
1008
1193
goto fallback;
1009
1194
}
1010
1195
1020
1205
bool bret = print_out_password(proc->buffer,
1021
1206
proc->buffer_length);
1022
1207
if(not bret){
1023
perror("print_out_password");
1024
exitstatus = EXIT_FAILURE;
1208
error(0, errno, "print_out_password");
1209
exitstatus = EX_IOERR;
1025
1210
}
1026
1211
goto fallback;
1027
1212
}
1034
1219
}
1035
1220
/* Before reading, make the process' data buffer large enough */
1036
1221
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1037
proc->buffer = realloc(proc->buffer, proc->buffer_size
1038
+ (size_t) BUFFER_SIZE);
1039
if(proc->buffer == NULL){
1040
perror("malloc");
1041
exitstatus = EXIT_FAILURE;
1222
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1223
+ (size_t) BUFFER_SIZE);
1224
if(new_buffer == NULL){
1225
error(0, errno, "malloc");
1226
exitstatus = EX_OSERR;
1042
1227
goto fallback;
1043
1228
}
1229
proc->buffer = new_buffer;
1044
1230
proc->buffer_size += BUFFER_SIZE;
1045
1231
}
1046
1232
/* Read from the process */
1047
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1048
BUFFER_SIZE);
1233
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1234
proc->buffer
1235
+ proc->buffer_length,
1236
BUFFER_SIZE));
1049
1237
if(sret < 0){
1050
1238
/* Read error from this process; ignore the error */
1051
1239
proc = proc->next;
1059
1247
}
1060
1248
}
1061
1249
}
1062
1063
1250
1251
1064
1252
fallback:
1065
1253
1066
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1254
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1255
and exitstatus != EX_OK)){
1067
1256
/* Fallback if all plugins failed, none are found or an error
1068
1257
occured */
1069
1258
bool bret;
1077
1266
}
1078
1267
bret = print_out_password(passwordbuffer, len);
1079
1268
if(not bret){
1080
perror("print_out_password");
1081
exitstatus = EXIT_FAILURE;
1269
error(0, errno, "print_out_password");
1270
exitstatus = EX_IOERR;
1082
1271
}
1083
1272
}
1084
1273
1085
1274
/* Restore old signal handler */
1086
1275
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1087
1276
if(ret == -1){
1088
perror("sigaction");
1089
exitstatus = EXIT_FAILURE;
1277
error(0, errno, "sigaction");
1278
exitstatus = EX_OSERR;
1090
1279
}
1091
1280
1092
1281
if(custom_argv != NULL){
1096
1285
free(custom_argv);
1097
1286
}
1098
1287
1099
if(dir != NULL){
1100
closedir(dir);
1288
free(direntries);
1289
1290
if(dir_fd != -1){
1291
close(dir_fd);
1101
1292
}
1102
1293
1103
1294
/* Kill the processes */
1107
1298
ret = kill(p->pid, SIGTERM);
1108
1299
if(ret == -1 and errno != ESRCH){
1109
1300
/* Set-uid proccesses might not get closed */
1110
perror("kill");
1301
error(0, errno, "kill");
1111
1302
}
1112
1303
}
1113
1304
}
1114
1305
1115
1306
/* Wait for any remaining child processes to terminate */
1116
do{
1307
do {
1117
1308
ret = wait(NULL);
1118
1309
} while(ret >= 0);
1119
1310
if(errno != ECHILD){
1120
perror("wait");
1311
error(0, errno, "wait");
1121
1312
}
1122
1313
1123
1314
free_plugin_list();
1124
1315
1125
1316
free(plugindir);
1317
free(pluginhelperdir);
1126
1318
free(argfile);
1127
1319
1128
1320
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0