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- Committer: Teddy Hogeborn
- Date: 2018-02-22 19:33:54 UTC
- mfrom: (367 release)
- mto: (237.7.594 trunk)
- mto: This revision was merged to the branch mainline in revision 368.
- Revision ID: teddy@recompile.se-20180222193354-uivyobeq4l5wyjt0
Merge from release branch
added
removed
plugin-runner.c
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2008-2013 Teddy Hogeborn
6
* Copyright © 2008-2013 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
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
14
16
* WITHOUT ANY WARRANTY; without even the implied warranty of
15
17
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16
18
* General Public License for more details.
17
19
*
18
20
* You should have received a copy of the GNU General Public License
19
* along with this program. If not, see
20
* <http://www.gnu.org/licenses/>.
21
* along with Mandos. If not, see <http://www.gnu.org/licenses/>.
21
22
*
22
23
* Contact the authors at <mandos@recompile.se>.
23
24
*/
24
25
25
26
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
asprintf(), O_CLOEXEC */
27
O_CLOEXEC, pipe2() */
27
28
#include <stddef.h> /* size_t, NULL */
28
29
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
29
30
realloc() */
30
31
#include <stdbool.h> /* bool, true, false */
31
32
#include <stdio.h> /* fileno(), fprintf(),
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() */
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() */
38
38
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
39
39
FD_SET(), FD_ISSET(), FD_CLR */
40
40
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
WEXITSTATUS(), WTERMSIG(),
42
WCOREDUMP() */
43
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
41
WEXITSTATUS(), WTERMSIG() */
42
#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
44
43
#include <iso646.h> /* and, or, not */
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() */
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
*/
54
52
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
55
FD_CLOEXEC */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal(), strcmp(), strncmp() */
53
FD_CLOEXEC, openat(), scandirat(),
54
pipe2() */
55
#include <string.h> /* strsep, strlen(), strsignal(),
56
strcmp(), strncmp() */
58
57
#include <errno.h> /* errno */
59
58
#include <argp.h> /* struct argp_option, struct
60
59
argp_state, struct argp,
72
71
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
73
72
#include <errno.h> /* errno */
74
73
#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"
79
80
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
80
81
81
82
const char *argp_program_version = "plugin-runner " VERSION;
105
106
106
107
/* Gets an existing plugin based on name,
107
108
or if none is found, creates a new one */
109
__attribute__((warn_unused_result))
108
110
static plugin *getplugin(char *name){
109
111
/* Check for existing plugin with that name */
110
112
for(plugin *p = plugin_list; p != NULL; p = p->next){
171
173
}
172
174
173
175
/* Helper function for add_argument and add_environment */
174
__attribute__((nonnull))
176
__attribute__((nonnull, warn_unused_result))
175
177
static bool add_to_char_array(const char *new, char ***array,
176
178
int *len){
177
179
/* Resize the pointed-to array to hold one more pointer */
180
char **new_array = NULL;
178
181
do {
179
*array = realloc(*array, sizeof(char *)
180
* (size_t) ((*len) + 2));
181
} while(*array == NULL and errno == EINTR);
182
new_array = realloc(*array, sizeof(char *)
183
* (size_t) ((*len) + 2));
184
} while(new_array == NULL and errno == EINTR);
182
185
/* Malloc check */
183
if(*array == NULL){
186
if(new_array == NULL){
184
187
return false;
185
188
}
189
*array = new_array;
186
190
/* Make a copy of the new string */
187
191
char *copy;
188
192
do {
200
204
}
201
205
202
206
/* Add to a plugin's argument vector */
203
__attribute__((nonnull(2)))
207
__attribute__((nonnull(2), warn_unused_result))
204
208
static bool add_argument(plugin *p, const char *arg){
205
209
if(p == NULL){
206
210
return false;
209
213
}
210
214
211
215
/* Add to a plugin's environment */
212
__attribute__((nonnull(2)))
216
__attribute__((nonnull(2), warn_unused_result))
213
217
static bool add_environment(plugin *p, const char *def, bool replace){
214
218
if(p == NULL){
215
219
return false;
217
221
/* namelen = length of name of environment variable */
218
222
size_t namelen = (size_t)(strchrnul(def, '=') - def);
219
223
/* Search for this environment variable */
220
for(char **e = p->environ; *e != NULL; e++){
221
if(strncmp(*e, def, namelen + 1) == 0){
224
for(char **envdef = p->environ; *envdef != NULL; envdef++){
225
if(strncmp(*envdef, def, namelen + 1) == 0){
222
226
/* It already exists */
223
227
if(replace){
224
char *new;
228
char *new_envdef;
225
229
do {
226
new = realloc(*e, strlen(def) + 1);
227
} while(new == NULL and errno == EINTR);
228
if(new == NULL){
230
new_envdef = realloc(*envdef, strlen(def) + 1);
231
} while(new_envdef == NULL and errno == EINTR);
232
if(new_envdef == NULL){
229
233
return false;
230
234
}
231
*e = new;
232
strcpy(*e, def);
235
*envdef = new_envdef;
236
strcpy(*envdef, def);
233
237
}
234
238
return true;
235
239
}
237
241
return add_to_char_array(def, &(p->environ), &(p->envc));
238
242
}
239
243
244
#ifndef O_CLOEXEC
240
245
/*
241
246
* Based on the example in the GNU LibC manual chapter 13.13 "File
242
247
* Descriptor Flags".
243
248
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
244
249
*/
250
__attribute__((warn_unused_result))
245
251
static int set_cloexec_flag(int fd){
246
252
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
247
253
/* If reading the flags failed, return error indication now. */
252
258
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
253
259
ret | FD_CLOEXEC));
254
260
}
261
#endif /* not O_CLOEXEC */
255
262
256
263
257
264
/* Mark processes as completed when they exit, and save their exit
289
296
}
290
297
291
298
/* Prints out a password to stdout */
292
__attribute__((nonnull))
299
__attribute__((nonnull, warn_unused_result))
293
300
static bool print_out_password(const char *buffer, size_t length){
294
301
ssize_t ret;
295
302
for(size_t written = 0; written < length; written += (size_t)ret){
341
348
342
349
int main(int argc, char *argv[]){
343
350
char *plugindir = NULL;
351
char *pluginhelperdir = NULL;
344
352
char *argfile = NULL;
345
353
FILE *conffp;
346
size_t d_name_len;
347
DIR *dir = NULL;
348
struct dirent *dirst;
354
struct dirent **direntries = NULL;
349
355
struct stat st;
350
356
fd_set rfds_all;
351
357
int ret, maxfd = 0;
359
365
.sa_flags = SA_NOCLDSTOP };
360
366
char **custom_argv = NULL;
361
367
int custom_argc = 0;
368
int dir_fd = -1;
362
369
363
370
/* Establish a signal handler */
364
371
sigemptyset(&sigchld_action.sa_mask);
409
416
.doc = "Group ID the plugins will run as", .group = 3 },
410
417
{ .name = "debug", .key = 132,
411
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 },
412
423
/*
413
424
* These reproduce what we would get without ARGP_NO_HELP
414
425
*/
435
446
break;
436
447
}
437
448
}
449
errno = 0;
438
450
}
439
451
break;
440
452
case 'G': /* --global-env */
441
add_environment(getplugin(NULL), arg, true);
453
if(add_environment(getplugin(NULL), arg, true)){
454
errno = 0;
455
}
442
456
break;
443
457
case 'o': /* --options-for */
444
458
{
461
475
break;
462
476
}
463
477
}
478
errno = 0;
464
479
}
465
480
break;
466
481
case 'E': /* --env-for */
478
493
errno = EINVAL;
479
494
break;
480
495
}
481
add_environment(getplugin(arg), envdef, true);
496
if(add_environment(getplugin(arg), envdef, true)){
497
errno = 0;
498
}
482
499
}
483
500
break;
484
501
case 'd': /* --disable */
486
503
plugin *p = getplugin(arg);
487
504
if(p != NULL){
488
505
p->disabled = true;
506
errno = 0;
489
507
}
490
508
}
491
509
break;
494
512
plugin *p = getplugin(arg);
495
513
if(p != NULL){
496
514
p->disabled = false;
515
errno = 0;
497
516
}
498
517
}
499
518
break;
500
519
case 128: /* --plugin-dir */
501
520
free(plugindir);
502
521
plugindir = strdup(arg);
522
if(plugindir != NULL){
523
errno = 0;
524
}
503
525
break;
504
526
case 129: /* --config-file */
505
527
/* This is already done by parse_opt_config_file() */
513
535
break;
514
536
}
515
537
uid = (uid_t)tmp_id;
538
errno = 0;
516
539
break;
517
540
case 131: /* --groupid */
518
541
tmp_id = strtoimax(arg, &tmp, 10);
523
546
break;
524
547
}
525
548
gid = (gid_t)tmp_id;
549
errno = 0;
526
550
break;
527
551
case 132: /* --debug */
528
552
debug = true;
529
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;
530
561
/*
531
562
* These reproduce what we would get without ARGP_NO_HELP
532
563
*/
552
583
if(arg[0] == '\0'){
553
584
break;
554
585
}
586
/* FALLTHROUGH */
555
587
default:
556
588
return ARGP_ERR_UNKNOWN;
557
589
}
576
608
case 129: /* --config-file */
577
609
free(argfile);
578
610
argfile = strdup(arg);
611
if(argfile != NULL){
612
errno = 0;
613
}
579
614
break;
580
615
case 130: /* --userid */
581
616
case 131: /* --groupid */
582
617
case 132: /* --debug */
618
case 133: /* --plugin-helper-dir */
583
619
case '?': /* --help */
584
620
case -3: /* --usage */
585
621
case 'V': /* --version */
664
700
}
665
701
666
702
custom_argc += 1;
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;
703
{
704
char **new_argv = realloc(custom_argv, sizeof(char *)
705
* ((size_t)custom_argc + 1));
706
if(new_argv == NULL){
707
error(0, errno, "realloc");
708
exitstatus = EX_OSERR;
709
free(new_arg);
710
free(org_line);
711
goto fallback;
712
} else {
713
custom_argv = new_argv;
714
}
674
715
}
675
716
custom_argv[custom_argc-1] = new_arg;
676
717
custom_argv[custom_argc] = NULL;
734
775
goto fallback;
735
776
}
736
777
778
{
779
char *pluginhelperenv;
780
bool bret = true;
781
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
782
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
783
if(ret != -1){
784
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
785
}
786
if(ret == -1 or not bret){
787
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
788
" environment variable to \"%s\" for all plugins\n",
789
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
790
}
791
if(ret != -1){
792
free(pluginhelperenv);
793
}
794
}
795
737
796
if(debug){
738
for(plugin *p = plugin_list; p != NULL; p=p->next){
797
for(plugin *p = plugin_list; p != NULL; p = p->next){
739
798
fprintf(stderr, "Plugin: %s has %d arguments\n",
740
799
p->name ? p->name : "Global", p->argc - 1);
741
800
for(char **a = p->argv; *a != NULL; a++){
750
809
751
810
if(getuid() == 0){
752
811
/* Work around Debian bug #633582:
753
<http://bugs.debian.org/633582> */
812
<https://bugs.debian.org/633582> */
754
813
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
755
814
if(plugindir_fd == -1){
756
error(0, errno, "open");
815
if(errno != ENOENT){
816
error(0, errno, "open(\"" PDIR "\")");
817
}
757
818
} else {
758
819
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
759
820
if(ret == -1){
766
827
}
767
828
}
768
829
}
769
TEMP_FAILURE_RETRY(close(plugindir_fd));
830
close(plugindir_fd);
770
831
}
771
832
}
772
833
782
843
783
844
/* Open plugin directory with close_on_exec flag */
784
845
{
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
}
846
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
847
#ifdef O_CLOEXEC
848
O_CLOEXEC
849
#else /* not O_CLOEXEC */
850
0
851
#endif /* not O_CLOEXEC */
852
);
803
853
if(dir_fd == -1){
804
854
error(0, errno, "Could not open plugin dir");
805
855
exitstatus = EX_UNAVAILABLE;
811
861
ret = set_cloexec_flag(dir_fd);
812
862
if(ret < 0){
813
863
error(0, errno, "set_cloexec_flag");
814
TEMP_FAILURE_RETRY(close(dir_fd));
815
864
exitstatus = EX_OSERR;
816
865
goto fallback;
817
866
}
818
867
#endif /* O_CLOEXEC */
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;
868
}
869
870
int good_name(const struct dirent * const dirent){
871
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
872
"*.dpkg-old", "*.dpkg-bak",
873
"*.dpkg-divert", NULL };
874
#ifdef __GNUC__
875
#pragma GCC diagnostic push
876
#pragma GCC diagnostic ignored "-Wcast-qual"
877
#endif
878
for(const char **pat = (const char **)patterns;
879
*pat != NULL; pat++){
880
#ifdef __GNUC__
881
#pragma GCC diagnostic pop
882
#endif
883
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
884
!= FNM_NOMATCH){
885
if(debug){
886
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
887
" matching pattern %s\n", dirent->d_name, *pat);
888
}
889
return 0;
890
}
826
891
}
892
return 1;
893
}
894
895
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
896
alphasort);
897
if(numplugins == -1){
898
error(0, errno, "Could not scan plugin dir");
899
direntries = NULL;
900
exitstatus = EX_OSERR;
901
goto fallback;
827
902
}
828
903
829
904
FD_ZERO(&rfds_all);
830
905
831
906
/* Read and execute any executable in the plugin directory*/
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");
907
for(int i = 0; i < numplugins; i++){
908
909
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
910
if(plugin_fd == -1){
911
error(0, errno, "Could not open plugin");
912
free(direntries[i]);
904
913
continue;
905
914
}
906
907
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
915
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
908
916
if(ret == -1){
909
917
error(0, errno, "stat");
910
free(filename);
918
close(plugin_fd);
919
free(direntries[i]);
911
920
continue;
912
921
}
913
922
914
923
/* Ignore non-executable files */
915
924
if(not S_ISREG(st.st_mode)
916
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
925
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
926
X_OK, 0)) != 0)){
917
927
if(debug){
918
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
919
" with bad type or mode\n", filename);
928
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
929
" with bad type or mode\n",
930
plugindir != NULL ? plugindir : PDIR,
931
direntries[i]->d_name);
920
932
}
921
free(filename);
933
close(plugin_fd);
934
free(direntries[i]);
922
935
continue;
923
936
}
924
937
925
plugin *p = getplugin(dirst->d_name);
938
plugin *p = getplugin(direntries[i]->d_name);
926
939
if(p == NULL){
927
940
error(0, errno, "getplugin");
928
free(filename);
941
close(plugin_fd);
942
free(direntries[i]);
929
943
continue;
930
944
}
931
945
if(p->disabled){
932
946
if(debug){
933
947
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
934
dirst->d_name);
948
direntries[i]->d_name);
935
949
}
936
free(filename);
950
close(plugin_fd);
951
free(direntries[i]);
937
952
continue;
938
953
}
939
954
{
953
968
}
954
969
}
955
970
}
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. */
971
/* If this plugin has any environment variables, we need to
972
duplicate the environment from this process, too. */
959
973
if(p->environ[0] != NULL){
960
974
for(char **e = environ; *e != NULL; e++){
961
975
if(not add_environment(p, *e, false)){
965
979
}
966
980
967
981
int pipefd[2];
982
#ifndef O_CLOEXEC
968
983
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
984
#else /* O_CLOEXEC */
985
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
986
#endif /* O_CLOEXEC */
969
987
if(ret == -1){
970
988
error(0, errno, "pipe");
971
989
exitstatus = EX_OSERR;
972
goto fallback;
973
}
990
free(direntries[i]);
991
goto fallback;
992
}
993
if(pipefd[0] >= FD_SETSIZE){
994
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
995
FD_SETSIZE);
996
close(pipefd[0]);
997
close(pipefd[1]);
998
exitstatus = EX_OSERR;
999
free(direntries[i]);
1000
goto fallback;
1001
}
1002
#ifndef O_CLOEXEC
974
1003
/* Ask OS to automatic close the pipe on exec */
975
1004
ret = set_cloexec_flag(pipefd[0]);
976
1005
if(ret < 0){
977
1006
error(0, errno, "set_cloexec_flag");
1007
close(pipefd[0]);
1008
close(pipefd[1]);
978
1009
exitstatus = EX_OSERR;
1010
free(direntries[i]);
979
1011
goto fallback;
980
1012
}
981
1013
ret = set_cloexec_flag(pipefd[1]);
982
1014
if(ret < 0){
983
1015
error(0, errno, "set_cloexec_flag");
1016
close(pipefd[0]);
1017
close(pipefd[1]);
984
1018
exitstatus = EX_OSERR;
1019
free(direntries[i]);
985
1020
goto fallback;
986
1021
}
1022
#endif /* not O_CLOEXEC */
987
1023
/* Block SIGCHLD until process is safely in process list */
988
1024
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
989
1025
&sigchld_action.sa_mask,
991
1027
if(ret < 0){
992
1028
error(0, errno, "sigprocmask");
993
1029
exitstatus = EX_OSERR;
1030
free(direntries[i]);
994
1031
goto fallback;
995
1032
}
996
1033
/* Starting a new process to be watched */
1000
1037
} while(pid == -1 and errno == EINTR);
1001
1038
if(pid == -1){
1002
1039
error(0, errno, "fork");
1040
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1041
&sigchld_action.sa_mask, NULL));
1042
close(pipefd[0]);
1043
close(pipefd[1]);
1003
1044
exitstatus = EX_OSERR;
1045
free(direntries[i]);
1004
1046
goto fallback;
1005
1047
}
1006
1048
if(pid == 0){
1022
1064
_exit(EX_OSERR);
1023
1065
}
1024
1066
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
}
1067
if(fexecve(plugin_fd, p->argv,
1068
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1069
error(0, errno, "fexecve for %s/%s",
1070
plugindir != NULL ? plugindir : PDIR,
1071
direntries[i]->d_name);
1072
_exit(EX_OSERR);
1040
1073
}
1041
1074
/* no return */
1042
1075
}
1043
1076
/* Parent process */
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);
1077
close(pipefd[1]); /* Close unused write end of pipe */
1078
close(plugin_fd);
1079
plugin *new_plugin = getplugin(direntries[i]->d_name);
1048
1080
if(new_plugin == NULL){
1049
1081
error(0, errno, "getplugin");
1050
1082
ret = (int)(TEMP_FAILURE_RETRY
1054
1086
error(0, errno, "sigprocmask");
1055
1087
}
1056
1088
exitstatus = EX_OSERR;
1089
free(direntries[i]);
1057
1090
goto fallback;
1058
1091
}
1092
free(direntries[i]);
1059
1093
1060
1094
new_plugin->pid = pid;
1061
1095
new_plugin->fd = pipefd[0];
1071
1105
goto fallback;
1072
1106
}
1073
1107
1074
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1075
-Wconversion */
1108
FD_SET(new_plugin->fd, &rfds_all);
1076
1109
1077
1110
if(maxfd < new_plugin->fd){
1078
1111
maxfd = new_plugin->fd;
1079
1112
}
1080
1113
}
1081
1114
1082
TEMP_FAILURE_RETRY(closedir(dir));
1083
dir = NULL;
1115
free(direntries);
1116
direntries = NULL;
1117
close(dir_fd);
1118
dir_fd = -1;
1084
1119
free_plugin(getplugin(NULL));
1085
1120
1086
1121
for(plugin *p = plugin_list; p != NULL; p = p->next){
1125
1160
(intmax_t) (proc->pid),
1126
1161
WTERMSIG(proc->status),
1127
1162
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));
1131
1163
}
1132
1164
}
1133
1165
1134
1166
/* Remove the plugin */
1135
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1136
-Wconversion */
1167
FD_CLR(proc->fd, &rfds_all);
1137
1168
1138
1169
/* Block signal while modifying process_list */
1139
1170
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1179
1210
}
1180
1211
1181
1212
/* This process has not completed. Does it have any output? */
1182
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1183
warning from
1184
-Wconversion */
1213
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1185
1214
/* This process had nothing to say at this time */
1186
1215
proc = proc->next;
1187
1216
continue;
1188
1217
}
1189
1218
/* Before reading, make the process' data buffer large enough */
1190
1219
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1191
proc->buffer = realloc(proc->buffer, proc->buffer_size
1192
+ (size_t) BUFFER_SIZE);
1193
if(proc->buffer == NULL){
1220
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1221
+ (size_t) BUFFER_SIZE);
1222
if(new_buffer == NULL){
1194
1223
error(0, errno, "malloc");
1195
1224
exitstatus = EX_OSERR;
1196
1225
goto fallback;
1197
1226
}
1227
proc->buffer = new_buffer;
1198
1228
proc->buffer_size += BUFFER_SIZE;
1199
1229
}
1200
1230
/* Read from the process */
1253
1283
free(custom_argv);
1254
1284
}
1255
1285
1256
if(dir != NULL){
1257
closedir(dir);
1286
free(direntries);
1287
1288
if(dir_fd != -1){
1289
close(dir_fd);
1258
1290
}
1259
1291
1260
1292
/* Kill the processes */
1280
1312
free_plugin_list();
1281
1313
1282
1314
free(plugindir);
1315
free(pluginhelperdir);
1283
1316
free(argfile);
1284
1317
1285
1318
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0