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- Committer: Teddy Hogeborn
- Date: 2012-02-21 21:29:12 UTC
- mfrom: (237.4.29 release)
- Revision ID: teddy@recompile.se-20120221212912-72ysftlcji3r1g7f
Merge from release branch.
- files added:
- initramfs-tools-hook-conf
- files removed:
- bugs.xml
- debian/tests
- debian/upstream
- dracut-module
- plugin-helpers
- files modified:
- .bzrignore
added
removed
plugin-runner.c
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2008-2018 Teddy Hogeborn
6
* Copyright © 2008-2018 Björn Påhlsson
7
*
8
* This file is part of Mandos.
9
*
10
* Mandos is free software: you can redistribute it and/or modify it
11
* under the terms of the GNU General Public License as published by
12
* the Free Software Foundation, either version 3 of the License, or
13
* (at your option) any later version.
14
*
15
* Mandos is distributed in the hope that it will be useful, but
5
* Copyright © 2008-2012 Teddy Hogeborn
6
* Copyright © 2008-2012 Björn Påhlsson
7
*
8
* This program is free software: you can redistribute it and/or
9
* modify it under the terms of the GNU General Public License as
10
* published by the Free Software Foundation, either version 3 of the
11
* License, or (at your option) any later version.
12
*
13
* This program is distributed in the hope that it will be useful, but
16
14
* WITHOUT ANY WARRANTY; without even the implied warranty of
17
15
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18
16
* General Public License for more details.
19
17
*
20
18
* You should have received a copy of the GNU General Public License
21
* along with Mandos. If not, see <http://www.gnu.org/licenses/>.
19
* along with this program. If not, see
20
* <http://www.gnu.org/licenses/>.
22
21
*
23
22
* Contact the authors at <mandos@recompile.se>.
24
23
*/
25
24
26
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
27
O_CLOEXEC, pipe2() */
26
asprintf(), O_CLOEXEC */
28
27
#include <stddef.h> /* size_t, NULL */
29
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
30
29
realloc() */
31
30
#include <stdbool.h> /* bool, true, false */
32
31
#include <stdio.h> /* fileno(), fprintf(),
33
stderr, STDOUT_FILENO, fclose() */
34
#include <sys/types.h> /* fstat(), struct stat, waitpid(),
35
WIFEXITED(), WEXITSTATUS(), wait(),
36
pid_t, uid_t, gid_t, getuid(),
37
getgid() */
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, fdopendir(), stat(), struct
34
stat, waitpid(), WIFEXITED(),
35
WEXITSTATUS(), wait(), pid_t,
36
uid_t, gid_t, getuid(), getgid(),
37
dirfd() */
38
38
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
39
39
FD_SET(), FD_ISSET(), FD_CLR */
40
40
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
WEXITSTATUS(), WTERMSIG() */
42
#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
41
WEXITSTATUS(), WTERMSIG(),
42
WCOREDUMP() */
43
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
43
44
#include <iso646.h> /* and, or, not */
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
*/
45
#include <dirent.h> /* DIR, struct dirent, fdopendir(),
46
readdir(), closedir(), dirfd() */
47
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
48
fcntl(), setuid(), setgid(),
49
F_GETFD, F_SETFD, FD_CLOEXEC,
50
access(), pipe(), fork(), close()
51
dup2(), STDOUT_FILENO, _exit(),
52
execv(), write(), read(),
53
close() */
52
54
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
53
FD_CLOEXEC, openat(), scandirat(),
54
pipe2() */
55
#include <string.h> /* strsep, strlen(), strsignal(),
56
strcmp(), strncmp() */
55
FD_CLOEXEC */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal(), strcmp(), strncmp() */
57
58
#include <errno.h> /* errno */
58
59
#include <argp.h> /* struct argp_option, struct
59
60
argp_state, struct argp,
71
72
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
72
73
#include <errno.h> /* errno */
73
74
#include <error.h> /* error() */
74
#include <fnmatch.h> /* fnmatch() */
75
75
76
76
#define BUFFER_SIZE 256
77
77
78
78
#define PDIR "/lib/mandos/plugins.d"
79
#define PHDIR "/lib/mandos/plugin-helpers"
80
79
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
81
80
82
81
const char *argp_program_version = "plugin-runner " VERSION;
106
105
107
106
/* Gets an existing plugin based on name,
108
107
or if none is found, creates a new one */
109
__attribute__((warn_unused_result))
110
108
static plugin *getplugin(char *name){
111
109
/* Check for existing plugin with that name */
112
110
for(plugin *p = plugin_list; p != NULL; p = p->next){
173
171
}
174
172
175
173
/* Helper function for add_argument and add_environment */
176
__attribute__((nonnull, warn_unused_result))
174
__attribute__((nonnull))
177
175
static bool add_to_char_array(const char *new, char ***array,
178
176
int *len){
179
177
/* Resize the pointed-to array to hold one more pointer */
180
char **new_array = NULL;
181
178
do {
182
new_array = realloc(*array, sizeof(char *)
183
* (size_t) ((*len) + 2));
184
} while(new_array == NULL and errno == EINTR);
179
*array = realloc(*array, sizeof(char *)
180
* (size_t) ((*len) + 2));
181
} while(*array == NULL and errno == EINTR);
185
182
/* Malloc check */
186
if(new_array == NULL){
183
if(*array == NULL){
187
184
return false;
188
185
}
189
*array = new_array;
190
186
/* Make a copy of the new string */
191
187
char *copy;
192
188
do {
204
200
}
205
201
206
202
/* Add to a plugin's argument vector */
207
__attribute__((nonnull(2), warn_unused_result))
203
__attribute__((nonnull(2)))
208
204
static bool add_argument(plugin *p, const char *arg){
209
205
if(p == NULL){
210
206
return false;
213
209
}
214
210
215
211
/* Add to a plugin's environment */
216
__attribute__((nonnull(2), warn_unused_result))
212
__attribute__((nonnull(2)))
217
213
static bool add_environment(plugin *p, const char *def, bool replace){
218
214
if(p == NULL){
219
215
return false;
221
217
/* namelen = length of name of environment variable */
222
218
size_t namelen = (size_t)(strchrnul(def, '=') - def);
223
219
/* Search for this environment variable */
224
for(char **envdef = p->environ; *envdef != NULL; envdef++){
225
if(strncmp(*envdef, def, namelen + 1) == 0){
220
for(char **e = p->environ; *e != NULL; e++){
221
if(strncmp(*e, def, namelen + 1) == 0){
226
222
/* It already exists */
227
223
if(replace){
228
char *new_envdef;
224
char *new;
229
225
do {
230
new_envdef = realloc(*envdef, strlen(def) + 1);
231
} while(new_envdef == NULL and errno == EINTR);
232
if(new_envdef == NULL){
226
new = realloc(*e, strlen(def) + 1);
227
} while(new == NULL and errno == EINTR);
228
if(new == NULL){
233
229
return false;
234
230
}
235
*envdef = new_envdef;
236
strcpy(*envdef, def);
231
*e = new;
232
strcpy(*e, def);
237
233
}
238
234
return true;
239
235
}
241
237
return add_to_char_array(def, &(p->environ), &(p->envc));
242
238
}
243
239
244
#ifndef O_CLOEXEC
245
240
/*
246
241
* Based on the example in the GNU LibC manual chapter 13.13 "File
247
242
* Descriptor Flags".
248
243
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
249
244
*/
250
__attribute__((warn_unused_result))
251
245
static int set_cloexec_flag(int fd){
252
246
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
253
247
/* If reading the flags failed, return error indication now. */
258
252
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
259
253
ret | FD_CLOEXEC));
260
254
}
261
#endif /* not O_CLOEXEC */
262
255
263
256
264
257
/* Mark processes as completed when they exit, and save their exit
296
289
}
297
290
298
291
/* Prints out a password to stdout */
299
__attribute__((nonnull, warn_unused_result))
292
__attribute__((nonnull))
300
293
static bool print_out_password(const char *buffer, size_t length){
301
294
ssize_t ret;
302
295
for(size_t written = 0; written < length; written += (size_t)ret){
313
306
__attribute__((nonnull))
314
307
static void free_plugin(plugin *plugin_node){
315
308
316
for(char **arg = (plugin_node->argv)+1; *arg != NULL; arg++){
309
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
317
310
free(*arg);
318
311
}
319
free(plugin_node->name);
320
312
free(plugin_node->argv);
321
313
for(char **env = plugin_node->environ; *env != NULL; env++){
322
314
free(*env);
349
341
350
342
int main(int argc, char *argv[]){
351
343
char *plugindir = NULL;
352
char *pluginhelperdir = NULL;
353
344
char *argfile = NULL;
354
345
FILE *conffp;
355
struct dirent **direntries = NULL;
346
size_t d_name_len;
347
DIR *dir = NULL;
348
struct dirent *dirst;
356
349
struct stat st;
357
350
fd_set rfds_all;
358
351
int ret, maxfd = 0;
366
359
.sa_flags = SA_NOCLDSTOP };
367
360
char **custom_argv = NULL;
368
361
int custom_argc = 0;
369
int dir_fd = -1;
370
362
371
363
/* Establish a signal handler */
372
364
sigemptyset(&sigchld_action.sa_mask);
417
409
.doc = "Group ID the plugins will run as", .group = 3 },
418
410
{ .name = "debug", .key = 132,
419
411
.doc = "Debug mode", .group = 4 },
420
{ .name = "plugin-helper-dir", .key = 133,
421
.arg = "DIRECTORY",
422
.doc = "Specify a different plugin helper directory",
423
.group = 2 },
424
412
/*
425
413
* These reproduce what we would get without ARGP_NO_HELP
426
414
*/
447
435
break;
448
436
}
449
437
}
450
errno = 0;
451
438
}
452
439
break;
453
440
case 'G': /* --global-env */
454
if(add_environment(getplugin(NULL), arg, true)){
455
errno = 0;
456
}
441
add_environment(getplugin(NULL), arg, true);
457
442
break;
458
443
case 'o': /* --options-for */
459
444
{
476
461
break;
477
462
}
478
463
}
479
errno = 0;
480
464
}
481
465
break;
482
466
case 'E': /* --env-for */
494
478
errno = EINVAL;
495
479
break;
496
480
}
497
if(add_environment(getplugin(arg), envdef, true)){
498
errno = 0;
499
}
481
add_environment(getplugin(arg), envdef, true);
500
482
}
501
483
break;
502
484
case 'd': /* --disable */
504
486
plugin *p = getplugin(arg);
505
487
if(p != NULL){
506
488
p->disabled = true;
507
errno = 0;
508
489
}
509
490
}
510
491
break;
513
494
plugin *p = getplugin(arg);
514
495
if(p != NULL){
515
496
p->disabled = false;
516
errno = 0;
517
497
}
518
498
}
519
499
break;
520
500
case 128: /* --plugin-dir */
521
501
free(plugindir);
522
502
plugindir = strdup(arg);
523
if(plugindir != NULL){
524
errno = 0;
525
}
526
503
break;
527
504
case 129: /* --config-file */
528
505
/* This is already done by parse_opt_config_file() */
536
513
break;
537
514
}
538
515
uid = (uid_t)tmp_id;
539
errno = 0;
540
516
break;
541
517
case 131: /* --groupid */
542
518
tmp_id = strtoimax(arg, &tmp, 10);
547
523
break;
548
524
}
549
525
gid = (gid_t)tmp_id;
550
errno = 0;
551
526
break;
552
527
case 132: /* --debug */
553
528
debug = true;
554
529
break;
555
case 133: /* --plugin-helper-dir */
556
free(pluginhelperdir);
557
pluginhelperdir = strdup(arg);
558
if(pluginhelperdir != NULL){
559
errno = 0;
560
}
561
break;
562
530
/*
563
531
* These reproduce what we would get without ARGP_NO_HELP
564
532
*/
565
533
case '?': /* --help */
566
534
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
567
535
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
568
__builtin_unreachable();
569
536
case -3: /* --usage */
570
537
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
571
538
argp_state_help(state, state->out_stream,
572
539
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
573
__builtin_unreachable();
574
540
case 'V': /* --version */
575
541
fprintf(state->out_stream, "%s\n", argp_program_version);
576
542
exit(EXIT_SUCCESS);
586
552
if(arg[0] == '\0'){
587
553
break;
588
554
}
589
#if __GNUC__ >= 7
590
__attribute__((fallthrough));
591
#else
592
/* FALLTHROUGH */
593
#endif
594
555
default:
595
556
return ARGP_ERR_UNKNOWN;
596
557
}
615
576
case 129: /* --config-file */
616
577
free(argfile);
617
578
argfile = strdup(arg);
618
if(argfile != NULL){
619
errno = 0;
620
}
621
579
break;
622
580
case 130: /* --userid */
623
581
case 131: /* --groupid */
624
582
case 132: /* --debug */
625
case 133: /* --plugin-helper-dir */
626
583
case '?': /* --help */
627
584
case -3: /* --usage */
628
585
case 'V': /* --version */
707
664
}
708
665
709
666
custom_argc += 1;
710
{
711
char **new_argv = realloc(custom_argv, sizeof(char *)
712
* ((size_t)custom_argc + 1));
713
if(new_argv == NULL){
714
error(0, errno, "realloc");
715
exitstatus = EX_OSERR;
716
free(new_arg);
717
free(org_line);
718
goto fallback;
719
} else {
720
custom_argv = new_argv;
721
}
667
custom_argv = realloc(custom_argv, sizeof(char *)
668
* ((unsigned int) custom_argc + 1));
669
if(custom_argv == NULL){
670
error(0, errno, "realloc");
671
exitstatus = EX_OSERR;
672
free(org_line);
673
goto fallback;
722
674
}
723
675
custom_argv[custom_argc-1] = new_arg;
724
676
custom_argv[custom_argc] = NULL;
782
734
goto fallback;
783
735
}
784
736
785
{
786
char *pluginhelperenv;
787
bool bret = true;
788
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
789
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
790
if(ret != -1){
791
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
792
}
793
if(ret == -1 or not bret){
794
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
795
" environment variable to \"%s\" for all plugins\n",
796
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
797
}
798
if(ret != -1){
799
free(pluginhelperenv);
800
}
801
}
802
803
737
if(debug){
804
for(plugin *p = plugin_list; p != NULL; p = p->next){
738
for(plugin *p = plugin_list; p != NULL; p=p->next){
805
739
fprintf(stderr, "Plugin: %s has %d arguments\n",
806
740
p->name ? p->name : "Global", p->argc - 1);
807
741
for(char **a = p->argv; *a != NULL; a++){
816
750
817
751
if(getuid() == 0){
818
752
/* Work around Debian bug #633582:
819
<https://bugs.debian.org/633582> */
753
<http://bugs.debian.org/633582> */
820
754
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
821
755
if(plugindir_fd == -1){
822
if(errno != ENOENT){
823
error(0, errno, "open(\"" PDIR "\")");
824
}
756
error(0, errno, "open");
825
757
} else {
826
758
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
827
759
if(ret == -1){
834
766
}
835
767
}
836
768
}
837
close(plugindir_fd);
769
TEMP_FAILURE_RETRY(close(plugindir_fd));
838
770
}
839
771
}
840
772
841
773
/* Lower permissions */
842
ret = setgid(gid);
774
setgid(gid);
843
775
if(ret == -1){
844
776
error(0, errno, "setgid");
845
777
}
850
782
851
783
/* Open plugin directory with close_on_exec flag */
852
784
{
853
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
854
#ifdef O_CLOEXEC
855
O_CLOEXEC
856
#else /* not O_CLOEXEC */
857
0
858
#endif /* not O_CLOEXEC */
859
);
785
int dir_fd = -1;
786
if(plugindir == NULL){
787
dir_fd = open(PDIR, O_RDONLY |
788
#ifdef O_CLOEXEC
789
O_CLOEXEC
790
#else /* not O_CLOEXEC */
791
0
792
#endif /* not O_CLOEXEC */
793
);
794
} else {
795
dir_fd = open(plugindir, O_RDONLY |
796
#ifdef O_CLOEXEC
797
O_CLOEXEC
798
#else /* not O_CLOEXEC */
799
0
800
#endif /* not O_CLOEXEC */
801
);
802
}
860
803
if(dir_fd == -1){
861
804
error(0, errno, "Could not open plugin dir");
862
805
exitstatus = EX_UNAVAILABLE;
868
811
ret = set_cloexec_flag(dir_fd);
869
812
if(ret < 0){
870
813
error(0, errno, "set_cloexec_flag");
814
TEMP_FAILURE_RETRY(close(dir_fd));
871
815
exitstatus = EX_OSERR;
872
816
goto fallback;
873
817
}
874
818
#endif /* O_CLOEXEC */
875
}
876
877
int good_name(const struct dirent * const dirent){
878
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
879
"*.dpkg-old", "*.dpkg-bak",
880
"*.dpkg-divert", NULL };
881
#ifdef __GNUC__
882
#pragma GCC diagnostic push
883
#pragma GCC diagnostic ignored "-Wcast-qual"
884
#endif
885
for(const char **pat = (const char **)patterns;
886
*pat != NULL; pat++){
887
#ifdef __GNUC__
888
#pragma GCC diagnostic pop
889
#endif
890
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
891
!= FNM_NOMATCH){
892
if(debug){
893
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
894
" matching pattern %s\n", dirent->d_name, *pat);
895
}
896
return 0;
897
}
819
820
dir = fdopendir(dir_fd);
821
if(dir == NULL){
822
error(0, errno, "Could not open plugin dir");
823
TEMP_FAILURE_RETRY(close(dir_fd));
824
exitstatus = EX_OSERR;
825
goto fallback;
898
826
}
899
return 1;
900
}
901
902
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
903
alphasort);
904
if(numplugins == -1){
905
error(0, errno, "Could not scan plugin dir");
906
direntries = NULL;
907
exitstatus = EX_OSERR;
908
goto fallback;
909
827
}
910
828
911
829
FD_ZERO(&rfds_all);
912
830
913
831
/* Read and execute any executable in the plugin directory*/
914
for(int i = 0; i < numplugins; i++){
915
916
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
917
if(plugin_fd == -1){
918
error(0, errno, "Could not open plugin");
919
free(direntries[i]);
832
while(true){
833
do {
834
dirst = readdir(dir);
835
} while(dirst == NULL and errno == EINTR);
836
837
/* All directory entries have been processed */
838
if(dirst == NULL){
839
if(errno == EBADF){
840
error(0, errno, "readdir");
841
exitstatus = EX_IOERR;
842
goto fallback;
843
}
844
break;
845
}
846
847
d_name_len = strlen(dirst->d_name);
848
849
/* Ignore dotfiles, backup files and other junk */
850
{
851
bool bad_name = false;
852
853
const char const *bad_prefixes[] = { ".", "#", NULL };
854
855
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
856
".dpkg-old",
857
".dpkg-bak",
858
".dpkg-divert", NULL };
859
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
860
size_t pre_len = strlen(*pre);
861
if((d_name_len >= pre_len)
862
and strncmp((dirst->d_name), *pre, pre_len) == 0){
863
if(debug){
864
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
865
" with bad prefix %s\n", dirst->d_name, *pre);
866
}
867
bad_name = true;
868
break;
869
}
870
}
871
if(bad_name){
872
continue;
873
}
874
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
875
size_t suf_len = strlen(*suf);
876
if((d_name_len >= suf_len)
877
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
878
== 0)){
879
if(debug){
880
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
881
" with bad suffix %s\n", dirst->d_name, *suf);
882
}
883
bad_name = true;
884
break;
885
}
886
}
887
888
if(bad_name){
889
continue;
890
}
891
}
892
893
char *filename;
894
if(plugindir == NULL){
895
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
896
dirst->d_name));
897
} else {
898
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
899
plugindir,
900
dirst->d_name));
901
}
902
if(ret < 0){
903
error(0, errno, "asprintf");
920
904
continue;
921
905
}
922
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
906
907
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
923
908
if(ret == -1){
924
909
error(0, errno, "stat");
925
close(plugin_fd);
926
free(direntries[i]);
910
free(filename);
927
911
continue;
928
912
}
929
913
930
914
/* Ignore non-executable files */
931
915
if(not S_ISREG(st.st_mode)
932
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
933
X_OK, 0)) != 0)){
916
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
934
917
if(debug){
935
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
936
" with bad type or mode\n",
937
plugindir != NULL ? plugindir : PDIR,
938
direntries[i]->d_name);
918
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
919
" with bad type or mode\n", filename);
939
920
}
940
close(plugin_fd);
941
free(direntries[i]);
921
free(filename);
942
922
continue;
943
923
}
944
924
945
plugin *p = getplugin(direntries[i]->d_name);
925
plugin *p = getplugin(dirst->d_name);
946
926
if(p == NULL){
947
927
error(0, errno, "getplugin");
948
close(plugin_fd);
949
free(direntries[i]);
928
free(filename);
950
929
continue;
951
930
}
952
931
if(p->disabled){
953
932
if(debug){
954
933
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
955
direntries[i]->d_name);
934
dirst->d_name);
956
935
}
957
close(plugin_fd);
958
free(direntries[i]);
936
free(filename);
959
937
continue;
960
938
}
961
939
{
975
953
}
976
954
}
977
955
}
978
/* If this plugin has any environment variables, we need to
979
duplicate the environment from this process, too. */
956
/* If this plugin has any environment variables, we will call
957
using execve and need to duplicate the environment from this
958
process, too. */
980
959
if(p->environ[0] != NULL){
981
960
for(char **e = environ; *e != NULL; e++){
982
961
if(not add_environment(p, *e, false)){
986
965
}
987
966
988
967
int pipefd[2];
989
#ifndef O_CLOEXEC
990
968
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
991
#else /* O_CLOEXEC */
992
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
993
#endif /* O_CLOEXEC */
994
969
if(ret == -1){
995
970
error(0, errno, "pipe");
996
971
exitstatus = EX_OSERR;
997
free(direntries[i]);
998
goto fallback;
999
}
1000
if(pipefd[0] >= FD_SETSIZE){
1001
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
1002
FD_SETSIZE);
1003
close(pipefd[0]);
1004
close(pipefd[1]);
1005
exitstatus = EX_OSERR;
1006
free(direntries[i]);
1007
goto fallback;
1008
}
1009
#ifndef O_CLOEXEC
972
goto fallback;
973
}
1010
974
/* Ask OS to automatic close the pipe on exec */
1011
975
ret = set_cloexec_flag(pipefd[0]);
1012
976
if(ret < 0){
1013
977
error(0, errno, "set_cloexec_flag");
1014
close(pipefd[0]);
1015
close(pipefd[1]);
1016
978
exitstatus = EX_OSERR;
1017
free(direntries[i]);
1018
979
goto fallback;
1019
980
}
1020
981
ret = set_cloexec_flag(pipefd[1]);
1021
982
if(ret < 0){
1022
983
error(0, errno, "set_cloexec_flag");
1023
close(pipefd[0]);
1024
close(pipefd[1]);
1025
984
exitstatus = EX_OSERR;
1026
free(direntries[i]);
1027
985
goto fallback;
1028
986
}
1029
#endif /* not O_CLOEXEC */
1030
987
/* Block SIGCHLD until process is safely in process list */
1031
988
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1032
989
&sigchld_action.sa_mask,
1034
991
if(ret < 0){
1035
992
error(0, errno, "sigprocmask");
1036
993
exitstatus = EX_OSERR;
1037
free(direntries[i]);
1038
994
goto fallback;
1039
995
}
1040
996
/* Starting a new process to be watched */
1044
1000
} while(pid == -1 and errno == EINTR);
1045
1001
if(pid == -1){
1046
1002
error(0, errno, "fork");
1047
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1048
&sigchld_action.sa_mask, NULL));
1049
close(pipefd[0]);
1050
close(pipefd[1]);
1051
1003
exitstatus = EX_OSERR;
1052
free(direntries[i]);
1053
1004
goto fallback;
1054
1005
}
1055
1006
if(pid == 0){
1071
1022
_exit(EX_OSERR);
1072
1023
}
1073
1024
1074
if(fexecve(plugin_fd, p->argv,
1075
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1076
error(0, errno, "fexecve for %s/%s",
1077
plugindir != NULL ? plugindir : PDIR,
1078
direntries[i]->d_name);
1079
_exit(EX_OSERR);
1025
if(dirfd(dir) < 0){
1026
/* If dir has no file descriptor, we could not set FD_CLOEXEC
1027
above and must now close it manually here. */
1028
closedir(dir);
1029
}
1030
if(p->environ[0] == NULL){
1031
if(execv(filename, p->argv) < 0){
1032
error(0, errno, "execv for %s", filename);
1033
_exit(EX_OSERR);
1034
}
1035
} else {
1036
if(execve(filename, p->argv, p->environ) < 0){
1037
error(0, errno, "execve for %s", filename);
1038
_exit(EX_OSERR);
1039
}
1080
1040
}
1081
1041
/* no return */
1082
1042
}
1083
1043
/* Parent process */
1084
close(pipefd[1]); /* Close unused write end of pipe */
1085
close(plugin_fd);
1086
plugin *new_plugin = getplugin(direntries[i]->d_name);
1044
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1045
pipe */
1046
free(filename);
1047
plugin *new_plugin = getplugin(dirst->d_name);
1087
1048
if(new_plugin == NULL){
1088
1049
error(0, errno, "getplugin");
1089
1050
ret = (int)(TEMP_FAILURE_RETRY
1093
1054
error(0, errno, "sigprocmask");
1094
1055
}
1095
1056
exitstatus = EX_OSERR;
1096
free(direntries[i]);
1097
1057
goto fallback;
1098
1058
}
1099
free(direntries[i]);
1100
1059
1101
1060
new_plugin->pid = pid;
1102
1061
new_plugin->fd = pipefd[0];
1103
1104
if(debug){
1105
fprintf(stderr, "Plugin %s started (PID %" PRIdMAX ")\n",
1106
new_plugin->name, (intmax_t) (new_plugin->pid));
1107
}
1108
1062
1109
1063
/* Unblock SIGCHLD so signal handler can be run if this process
1110
1064
has already completed */
1111
1065
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1117
1071
goto fallback;
1118
1072
}
1119
1073
1120
FD_SET(new_plugin->fd, &rfds_all);
1074
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1075
-Wconversion */
1121
1076
1122
1077
if(maxfd < new_plugin->fd){
1123
1078
maxfd = new_plugin->fd;
1124
1079
}
1125
1080
}
1126
1081
1127
free(direntries);
1128
direntries = NULL;
1129
close(dir_fd);
1130
dir_fd = -1;
1082
TEMP_FAILURE_RETRY(closedir(dir));
1083
dir = NULL;
1131
1084
free_plugin(getplugin(NULL));
1132
1085
1133
1086
for(plugin *p = plugin_list; p != NULL; p = p->next){
1172
1125
(intmax_t) (proc->pid),
1173
1126
WTERMSIG(proc->status),
1174
1127
strsignal(WTERMSIG(proc->status)));
1128
} else if(WCOREDUMP(proc->status)){
1129
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1130
" core\n", proc->name, (intmax_t) (proc->pid));
1175
1131
}
1176
1132
}
1177
1133
1178
1134
/* Remove the plugin */
1179
FD_CLR(proc->fd, &rfds_all);
1135
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1136
-Wconversion */
1180
1137
1181
1138
/* Block signal while modifying process_list */
1182
1139
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1222
1179
}
1223
1180
1224
1181
/* This process has not completed. Does it have any output? */
1225
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1182
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1183
warning from
1184
-Wconversion */
1226
1185
/* This process had nothing to say at this time */
1227
1186
proc = proc->next;
1228
1187
continue;
1229
1188
}
1230
1189
/* Before reading, make the process' data buffer large enough */
1231
1190
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1232
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1233
+ (size_t) BUFFER_SIZE);
1234
if(new_buffer == NULL){
1191
proc->buffer = realloc(proc->buffer, proc->buffer_size
1192
+ (size_t) BUFFER_SIZE);
1193
if(proc->buffer == NULL){
1235
1194
error(0, errno, "malloc");
1236
1195
exitstatus = EX_OSERR;
1237
1196
goto fallback;
1238
1197
}
1239
proc->buffer = new_buffer;
1240
1198
proc->buffer_size += BUFFER_SIZE;
1241
1199
}
1242
1200
/* Read from the process */
1295
1253
free(custom_argv);
1296
1254
}
1297
1255
1298
free(direntries);
1299
1300
if(dir_fd != -1){
1301
close(dir_fd);
1256
if(dir != NULL){
1257
closedir(dir);
1302
1258
}
1303
1259
1304
1260
/* Kill the processes */
1324
1280
free_plugin_list();
1325
1281
1326
1282
free(plugindir);
1327
free(pluginhelperdir);
1328
1283
free(argfile);
1329
1284
1330
1285
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0