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- Committer: Teddy Hogeborn
- Date: 2014-03-01 09:48:33 UTC
- mto: (237.7.272 trunk)
- mto: This revision was merged to the branch mainline in revision 311.
- Revision ID: teddy@recompile.se-20140301094833-t1678vzx6ph6zsxg
* debian/upstream-signing-key.pgp: New; upstream source public key.
- files added:
- debian/upstream-signing-key.pgp
- files removed:
- debian/upstream
- plugin-helpers
- files modified:
- DBUS-API
added
removed
plugin-runner.c
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2008-2015 Teddy Hogeborn
6
* Copyright © 2008-2015 Björn Påhlsson
5
* Copyright © 2008-2013 Teddy Hogeborn
6
* Copyright © 2008-2013 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
23
23
*/
24
24
25
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
O_CLOEXEC, pipe2() */
26
asprintf(), O_CLOEXEC */
27
27
#include <stddef.h> /* size_t, NULL */
28
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
29
29
realloc() */
30
30
#include <stdbool.h> /* bool, true, false */
31
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() */
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() */
37
38
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
38
39
FD_SET(), FD_ISSET(), FD_CLR */
39
40
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
40
41
WEXITSTATUS(), WTERMSIG(),
41
42
WCOREDUMP() */
42
#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
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){
348
341
349
342
int main(int argc, char *argv[]){
350
343
char *plugindir = NULL;
351
char *pluginhelperdir = NULL;
352
344
char *argfile = NULL;
353
345
FILE *conffp;
354
struct dirent **direntries = NULL;
346
size_t d_name_len;
347
DIR *dir = NULL;
348
struct dirent *dirst;
355
349
struct stat st;
356
350
fd_set rfds_all;
357
351
int ret, maxfd = 0;
365
359
.sa_flags = SA_NOCLDSTOP };
366
360
char **custom_argv = NULL;
367
361
int custom_argc = 0;
368
int dir_fd = -1;
369
362
370
363
/* Establish a signal handler */
371
364
sigemptyset(&sigchld_action.sa_mask);
416
409
.doc = "Group ID the plugins will run as", .group = 3 },
417
410
{ .name = "debug", .key = 132,
418
411
.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
412
/*
424
413
* These reproduce what we would get without ARGP_NO_HELP
425
414
*/
446
435
break;
447
436
}
448
437
}
449
errno = 0;
450
438
}
451
439
break;
452
440
case 'G': /* --global-env */
453
if(add_environment(getplugin(NULL), arg, true)){
454
errno = 0;
455
}
441
add_environment(getplugin(NULL), arg, true);
456
442
break;
457
443
case 'o': /* --options-for */
458
444
{
475
461
break;
476
462
}
477
463
}
478
errno = 0;
479
464
}
480
465
break;
481
466
case 'E': /* --env-for */
493
478
errno = EINVAL;
494
479
break;
495
480
}
496
if(add_environment(getplugin(arg), envdef, true)){
497
errno = 0;
498
}
481
add_environment(getplugin(arg), envdef, true);
499
482
}
500
483
break;
501
484
case 'd': /* --disable */
503
486
plugin *p = getplugin(arg);
504
487
if(p != NULL){
505
488
p->disabled = true;
506
errno = 0;
507
489
}
508
490
}
509
491
break;
512
494
plugin *p = getplugin(arg);
513
495
if(p != NULL){
514
496
p->disabled = false;
515
errno = 0;
516
497
}
517
498
}
518
499
break;
519
500
case 128: /* --plugin-dir */
520
501
free(plugindir);
521
502
plugindir = strdup(arg);
522
if(plugindir != NULL){
523
errno = 0;
524
}
525
503
break;
526
504
case 129: /* --config-file */
527
505
/* This is already done by parse_opt_config_file() */
535
513
break;
536
514
}
537
515
uid = (uid_t)tmp_id;
538
errno = 0;
539
516
break;
540
517
case 131: /* --groupid */
541
518
tmp_id = strtoimax(arg, &tmp, 10);
546
523
break;
547
524
}
548
525
gid = (gid_t)tmp_id;
549
errno = 0;
550
526
break;
551
527
case 132: /* --debug */
552
528
debug = true;
553
529
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
530
/*
562
531
* These reproduce what we would get without ARGP_NO_HELP
563
532
*/
607
576
case 129: /* --config-file */
608
577
free(argfile);
609
578
argfile = strdup(arg);
610
if(argfile != NULL){
611
errno = 0;
612
}
613
579
break;
614
580
case 130: /* --userid */
615
581
case 131: /* --groupid */
616
582
case 132: /* --debug */
617
case 133: /* --plugin-helper-dir */
618
583
case '?': /* --help */
619
584
case -3: /* --usage */
620
585
case 'V': /* --version */
699
664
}
700
665
701
666
custom_argc += 1;
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
}
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;
714
674
}
715
675
custom_argv[custom_argc-1] = new_arg;
716
676
custom_argv[custom_argc] = NULL;
774
734
goto fallback;
775
735
}
776
736
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
}
793
}
794
795
737
if(debug){
796
738
for(plugin *p = plugin_list; p != NULL; p=p->next){
797
739
fprintf(stderr, "Plugin: %s has %d arguments\n",
811
753
<http://bugs.debian.org/633582> */
812
754
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
813
755
if(plugindir_fd == -1){
814
if(errno != ENOENT){
815
error(0, errno, "open(\"" PDIR "\")");
816
}
756
error(0, errno, "open");
817
757
} else {
818
758
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
819
759
if(ret == -1){
826
766
}
827
767
}
828
768
}
829
close(plugindir_fd);
769
TEMP_FAILURE_RETRY(close(plugindir_fd));
830
770
}
831
771
}
832
772
842
782
843
783
/* Open plugin directory with close_on_exec flag */
844
784
{
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
);
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
}
852
803
if(dir_fd == -1){
853
804
error(0, errno, "Could not open plugin dir");
854
805
exitstatus = EX_UNAVAILABLE;
860
811
ret = set_cloexec_flag(dir_fd);
861
812
if(ret < 0){
862
813
error(0, errno, "set_cloexec_flag");
814
TEMP_FAILURE_RETRY(close(dir_fd));
863
815
exitstatus = EX_OSERR;
864
816
goto fallback;
865
817
}
866
818
#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;
889
}
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;
890
826
}
891
return 1;
892
}
893
894
#ifdef __GLIBC__
895
#if __GLIBC_PREREQ(2, 15)
896
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
897
alphasort);
898
#else /* not __GLIBC_PREREQ(2, 15) */
899
int numplugins = scandir(plugindir != NULL ? plugindir : PDIR,
900
&direntries, good_name, alphasort);
901
#endif /* not __GLIBC_PREREQ(2, 15) */
902
#else /* not __GLIBC__ */
903
int numplugins = scandir(plugindir != NULL ? plugindir : PDIR,
904
&direntries, good_name, alphasort);
905
#endif /* not __GLIBC__ */
906
if(numplugins == -1){
907
error(0, errno, "Could not scan plugin dir");
908
direntries = NULL;
909
exitstatus = EX_OSERR;
910
goto fallback;
911
827
}
912
828
913
829
FD_ZERO(&rfds_all);
914
830
915
831
/* Read and execute any executable in the plugin directory*/
916
for(int i = 0; i < numplugins; i++){
917
918
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
919
if(plugin_fd == -1){
920
error(0, errno, "Could not open plugin");
921
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
#pragma GCC diagnostic push
860
#pragma GCC diagnostic ignored "-Wcast-qual"
861
for(const char **pre = (const char **)bad_prefixes;
862
*pre != NULL; pre++){
863
#pragma GCC diagnostic pop
864
size_t pre_len = strlen(*pre);
865
if((d_name_len >= pre_len)
866
and strncmp((dirst->d_name), *pre, pre_len) == 0){
867
if(debug){
868
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
869
" with bad prefix %s\n", dirst->d_name, *pre);
870
}
871
bad_name = true;
872
break;
873
}
874
}
875
if(bad_name){
876
continue;
877
}
878
#pragma GCC diagnostic push
879
#pragma GCC diagnostic ignored "-Wcast-qual"
880
for(const char **suf = (const char **)bad_suffixes;
881
*suf != NULL; suf++){
882
#pragma GCC diagnostic pop
883
size_t suf_len = strlen(*suf);
884
if((d_name_len >= suf_len)
885
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
886
== 0)){
887
if(debug){
888
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
889
" with bad suffix %s\n", dirst->d_name, *suf);
890
}
891
bad_name = true;
892
break;
893
}
894
}
895
896
if(bad_name){
897
continue;
898
}
899
}
900
901
char *filename;
902
if(plugindir == NULL){
903
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
904
dirst->d_name));
905
} else {
906
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
907
plugindir,
908
dirst->d_name));
909
}
910
if(ret < 0){
911
error(0, errno, "asprintf");
922
912
continue;
923
913
}
924
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
914
915
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
925
916
if(ret == -1){
926
917
error(0, errno, "stat");
927
close(plugin_fd);
928
free(direntries[i]);
918
free(filename);
929
919
continue;
930
920
}
931
921
932
922
/* Ignore non-executable files */
933
923
if(not S_ISREG(st.st_mode)
934
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
935
X_OK, 0)) != 0)){
924
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
936
925
if(debug){
937
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
938
" with bad type or mode\n",
939
plugindir != NULL ? plugindir : PDIR,
940
direntries[i]->d_name);
926
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
927
" with bad type or mode\n", filename);
941
928
}
942
close(plugin_fd);
943
free(direntries[i]);
929
free(filename);
944
930
continue;
945
931
}
946
932
947
plugin *p = getplugin(direntries[i]->d_name);
933
plugin *p = getplugin(dirst->d_name);
948
934
if(p == NULL){
949
935
error(0, errno, "getplugin");
950
close(plugin_fd);
951
free(direntries[i]);
936
free(filename);
952
937
continue;
953
938
}
954
939
if(p->disabled){
955
940
if(debug){
956
941
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
957
direntries[i]->d_name);
942
dirst->d_name);
958
943
}
959
close(plugin_fd);
960
free(direntries[i]);
944
free(filename);
961
945
continue;
962
946
}
963
947
{
977
961
}
978
962
}
979
963
}
980
/* If this plugin has any environment variables, we need to
981
duplicate the environment from this process, too. */
964
/* If this plugin has any environment variables, we will call
965
using execve and need to duplicate the environment from this
966
process, too. */
982
967
if(p->environ[0] != NULL){
983
968
for(char **e = environ; *e != NULL; e++){
984
969
if(not add_environment(p, *e, false)){
988
973
}
989
974
990
975
int pipefd[2];
991
#ifndef O_CLOEXEC
992
976
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
993
#else /* O_CLOEXEC */
994
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
995
#endif /* O_CLOEXEC */
996
977
if(ret == -1){
997
978
error(0, errno, "pipe");
998
979
exitstatus = EX_OSERR;
999
free(direntries[i]);
1000
goto fallback;
1001
}
1002
if(pipefd[0] >= FD_SETSIZE){
1003
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
1004
FD_SETSIZE);
1005
close(pipefd[0]);
1006
close(pipefd[1]);
1007
exitstatus = EX_OSERR;
1008
free(direntries[i]);
1009
goto fallback;
1010
}
1011
#ifndef O_CLOEXEC
980
goto fallback;
981
}
1012
982
/* Ask OS to automatic close the pipe on exec */
1013
983
ret = set_cloexec_flag(pipefd[0]);
1014
984
if(ret < 0){
1015
985
error(0, errno, "set_cloexec_flag");
1016
close(pipefd[0]);
1017
close(pipefd[1]);
1018
986
exitstatus = EX_OSERR;
1019
free(direntries[i]);
1020
987
goto fallback;
1021
988
}
1022
989
ret = set_cloexec_flag(pipefd[1]);
1023
990
if(ret < 0){
1024
991
error(0, errno, "set_cloexec_flag");
1025
close(pipefd[0]);
1026
close(pipefd[1]);
1027
992
exitstatus = EX_OSERR;
1028
free(direntries[i]);
1029
993
goto fallback;
1030
994
}
1031
#endif /* not O_CLOEXEC */
1032
995
/* Block SIGCHLD until process is safely in process list */
1033
996
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1034
997
&sigchld_action.sa_mask,
1036
999
if(ret < 0){
1037
1000
error(0, errno, "sigprocmask");
1038
1001
exitstatus = EX_OSERR;
1039
free(direntries[i]);
1040
1002
goto fallback;
1041
1003
}
1042
1004
/* Starting a new process to be watched */
1046
1008
} while(pid == -1 and errno == EINTR);
1047
1009
if(pid == -1){
1048
1010
error(0, errno, "fork");
1049
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1050
&sigchld_action.sa_mask, NULL));
1051
close(pipefd[0]);
1052
close(pipefd[1]);
1053
1011
exitstatus = EX_OSERR;
1054
free(direntries[i]);
1055
1012
goto fallback;
1056
1013
}
1057
1014
if(pid == 0){
1073
1030
_exit(EX_OSERR);
1074
1031
}
1075
1032
1076
if(fexecve(plugin_fd, p->argv,
1077
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1078
error(0, errno, "fexecve for %s/%s",
1079
plugindir != NULL ? plugindir : PDIR,
1080
direntries[i]->d_name);
1081
_exit(EX_OSERR);
1033
if(dirfd(dir) < 0){
1034
/* If dir has no file descriptor, we could not set FD_CLOEXEC
1035
above and must now close it manually here. */
1036
closedir(dir);
1037
}
1038
if(p->environ[0] == NULL){
1039
if(execv(filename, p->argv) < 0){
1040
error(0, errno, "execv for %s", filename);
1041
_exit(EX_OSERR);
1042
}
1043
} else {
1044
if(execve(filename, p->argv, p->environ) < 0){
1045
error(0, errno, "execve for %s", filename);
1046
_exit(EX_OSERR);
1047
}
1082
1048
}
1083
1049
/* no return */
1084
1050
}
1085
1051
/* Parent process */
1086
close(pipefd[1]); /* Close unused write end of pipe */
1087
close(plugin_fd);
1088
plugin *new_plugin = getplugin(direntries[i]->d_name);
1052
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1053
pipe */
1054
free(filename);
1055
plugin *new_plugin = getplugin(dirst->d_name);
1089
1056
if(new_plugin == NULL){
1090
1057
error(0, errno, "getplugin");
1091
1058
ret = (int)(TEMP_FAILURE_RETRY
1095
1062
error(0, errno, "sigprocmask");
1096
1063
}
1097
1064
exitstatus = EX_OSERR;
1098
free(direntries[i]);
1099
1065
goto fallback;
1100
1066
}
1101
free(direntries[i]);
1102
1067
1103
1068
new_plugin->pid = pid;
1104
1069
new_plugin->fd = pipefd[0];
1134
1099
}
1135
1100
}
1136
1101
1137
free(direntries);
1138
direntries = NULL;
1139
close(dir_fd);
1140
dir_fd = -1;
1102
TEMP_FAILURE_RETRY(closedir(dir));
1103
dir = NULL;
1141
1104
free_plugin(getplugin(NULL));
1142
1105
1143
1106
for(plugin *p = plugin_list; p != NULL; p = p->next){
1271
1234
}
1272
1235
/* Before reading, make the process' data buffer large enough */
1273
1236
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1274
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1275
+ (size_t) BUFFER_SIZE);
1276
if(new_buffer == NULL){
1237
proc->buffer = realloc(proc->buffer, proc->buffer_size
1238
+ (size_t) BUFFER_SIZE);
1239
if(proc->buffer == NULL){
1277
1240
error(0, errno, "malloc");
1278
1241
exitstatus = EX_OSERR;
1279
1242
goto fallback;
1280
1243
}
1281
proc->buffer = new_buffer;
1282
1244
proc->buffer_size += BUFFER_SIZE;
1283
1245
}
1284
1246
/* Read from the process */
1337
1299
free(custom_argv);
1338
1300
}
1339
1301
1340
free(direntries);
1341
1342
if(dir_fd != -1){
1343
close(dir_fd);
1302
if(dir != NULL){
1303
closedir(dir);
1344
1304
}
1345
1305
1346
1306
/* Kill the processes */
1366
1326
free_plugin_list();
1367
1327
1368
1328
free(plugindir);
1369
free(pluginhelperdir);
1370
1329
free(argfile);
1371
1330
1372
1331
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0