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- Committer: Teddy Hogeborn
- Date: 2012-05-17 01:55:58 UTC
- Revision ID: teddy@recompile.se-20120517015558-5703p8nkquc2rhgd
* .bzrignore (statedir): Added.
- files added:
- initramfs-tools-hook-conf
- files removed:
- bugs.xml
- 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 © 2008-2018 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){
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
*/
564
533
case '?': /* --help */
565
534
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
566
535
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
567
__builtin_unreachable();
568
536
case -3: /* --usage */
569
537
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
570
538
argp_state_help(state, state->out_stream,
571
539
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
572
__builtin_unreachable();
573
540
case 'V': /* --version */
574
541
fprintf(state->out_stream, "%s\n", argp_program_version);
575
542
exit(EXIT_SUCCESS);
585
552
if(arg[0] == '\0'){
586
553
break;
587
554
}
588
/* FALLTHROUGH */
589
555
default:
590
556
return ARGP_ERR_UNKNOWN;
591
557
}
610
576
case 129: /* --config-file */
611
577
free(argfile);
612
578
argfile = strdup(arg);
613
if(argfile != NULL){
614
errno = 0;
615
}
616
579
break;
617
580
case 130: /* --userid */
618
581
case 131: /* --groupid */
619
582
case 132: /* --debug */
620
case 133: /* --plugin-helper-dir */
621
583
case '?': /* --help */
622
584
case -3: /* --usage */
623
585
case 'V': /* --version */
702
664
}
703
665
704
666
custom_argc += 1;
705
{
706
char **new_argv = realloc(custom_argv, sizeof(char *)
707
* ((size_t)custom_argc + 1));
708
if(new_argv == NULL){
709
error(0, errno, "realloc");
710
exitstatus = EX_OSERR;
711
free(new_arg);
712
free(org_line);
713
goto fallback;
714
} else {
715
custom_argv = new_argv;
716
}
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;
717
674
}
718
675
custom_argv[custom_argc-1] = new_arg;
719
676
custom_argv[custom_argc] = NULL;
777
734
goto fallback;
778
735
}
779
736
780
{
781
char *pluginhelperenv;
782
bool bret = true;
783
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
784
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
785
if(ret != -1){
786
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
787
}
788
if(ret == -1 or not bret){
789
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
790
" environment variable to \"%s\" for all plugins\n",
791
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
792
}
793
if(ret != -1){
794
free(pluginhelperenv);
795
}
796
}
797
798
737
if(debug){
799
for(plugin *p = plugin_list; p != NULL; p = p->next){
738
for(plugin *p = plugin_list; p != NULL; p=p->next){
800
739
fprintf(stderr, "Plugin: %s has %d arguments\n",
801
740
p->name ? p->name : "Global", p->argc - 1);
802
741
for(char **a = p->argv; *a != NULL; a++){
811
750
812
751
if(getuid() == 0){
813
752
/* Work around Debian bug #633582:
814
<https://bugs.debian.org/633582> */
753
<http://bugs.debian.org/633582> */
815
754
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
816
755
if(plugindir_fd == -1){
817
if(errno != ENOENT){
818
error(0, errno, "open(\"" PDIR "\")");
819
}
756
error(0, errno, "open");
820
757
} else {
821
758
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
822
759
if(ret == -1){
829
766
}
830
767
}
831
768
}
832
close(plugindir_fd);
769
TEMP_FAILURE_RETRY(close(plugindir_fd));
833
770
}
834
771
}
835
772
836
773
/* Lower permissions */
837
ret = setgid(gid);
774
setgid(gid);
838
775
if(ret == -1){
839
776
error(0, errno, "setgid");
840
777
}
845
782
846
783
/* Open plugin directory with close_on_exec flag */
847
784
{
848
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
849
#ifdef O_CLOEXEC
850
O_CLOEXEC
851
#else /* not O_CLOEXEC */
852
0
853
#endif /* not O_CLOEXEC */
854
);
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
}
855
803
if(dir_fd == -1){
856
804
error(0, errno, "Could not open plugin dir");
857
805
exitstatus = EX_UNAVAILABLE;
863
811
ret = set_cloexec_flag(dir_fd);
864
812
if(ret < 0){
865
813
error(0, errno, "set_cloexec_flag");
814
TEMP_FAILURE_RETRY(close(dir_fd));
866
815
exitstatus = EX_OSERR;
867
816
goto fallback;
868
817
}
869
818
#endif /* O_CLOEXEC */
870
}
871
872
int good_name(const struct dirent * const dirent){
873
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
874
"*.dpkg-old", "*.dpkg-bak",
875
"*.dpkg-divert", NULL };
876
#ifdef __GNUC__
877
#pragma GCC diagnostic push
878
#pragma GCC diagnostic ignored "-Wcast-qual"
879
#endif
880
for(const char **pat = (const char **)patterns;
881
*pat != NULL; pat++){
882
#ifdef __GNUC__
883
#pragma GCC diagnostic pop
884
#endif
885
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
886
!= FNM_NOMATCH){
887
if(debug){
888
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
889
" matching pattern %s\n", dirent->d_name, *pat);
890
}
891
return 0;
892
}
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;
893
826
}
894
return 1;
895
}
896
897
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
898
alphasort);
899
if(numplugins == -1){
900
error(0, errno, "Could not scan plugin dir");
901
direntries = NULL;
902
exitstatus = EX_OSERR;
903
goto fallback;
904
827
}
905
828
906
829
FD_ZERO(&rfds_all);
907
830
908
831
/* Read and execute any executable in the plugin directory*/
909
for(int i = 0; i < numplugins; i++){
910
911
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
912
if(plugin_fd == -1){
913
error(0, errno, "Could not open plugin");
914
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");
915
904
continue;
916
905
}
917
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
906
907
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
918
908
if(ret == -1){
919
909
error(0, errno, "stat");
920
close(plugin_fd);
921
free(direntries[i]);
910
free(filename);
922
911
continue;
923
912
}
924
913
925
914
/* Ignore non-executable files */
926
915
if(not S_ISREG(st.st_mode)
927
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
928
X_OK, 0)) != 0)){
916
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
929
917
if(debug){
930
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
931
" with bad type or mode\n",
932
plugindir != NULL ? plugindir : PDIR,
933
direntries[i]->d_name);
918
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
919
" with bad type or mode\n", filename);
934
920
}
935
close(plugin_fd);
936
free(direntries[i]);
921
free(filename);
937
922
continue;
938
923
}
939
924
940
plugin *p = getplugin(direntries[i]->d_name);
925
plugin *p = getplugin(dirst->d_name);
941
926
if(p == NULL){
942
927
error(0, errno, "getplugin");
943
close(plugin_fd);
944
free(direntries[i]);
928
free(filename);
945
929
continue;
946
930
}
947
931
if(p->disabled){
948
932
if(debug){
949
933
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
950
direntries[i]->d_name);
934
dirst->d_name);
951
935
}
952
close(plugin_fd);
953
free(direntries[i]);
936
free(filename);
954
937
continue;
955
938
}
956
939
{
970
953
}
971
954
}
972
955
}
973
/* If this plugin has any environment variables, we need to
974
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. */
975
959
if(p->environ[0] != NULL){
976
960
for(char **e = environ; *e != NULL; e++){
977
961
if(not add_environment(p, *e, false)){
981
965
}
982
966
983
967
int pipefd[2];
984
#ifndef O_CLOEXEC
985
968
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
986
#else /* O_CLOEXEC */
987
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
988
#endif /* O_CLOEXEC */
989
969
if(ret == -1){
990
970
error(0, errno, "pipe");
991
971
exitstatus = EX_OSERR;
992
free(direntries[i]);
993
goto fallback;
994
}
995
if(pipefd[0] >= FD_SETSIZE){
996
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
997
FD_SETSIZE);
998
close(pipefd[0]);
999
close(pipefd[1]);
1000
exitstatus = EX_OSERR;
1001
free(direntries[i]);
1002
goto fallback;
1003
}
1004
#ifndef O_CLOEXEC
972
goto fallback;
973
}
1005
974
/* Ask OS to automatic close the pipe on exec */
1006
975
ret = set_cloexec_flag(pipefd[0]);
1007
976
if(ret < 0){
1008
977
error(0, errno, "set_cloexec_flag");
1009
close(pipefd[0]);
1010
close(pipefd[1]);
1011
978
exitstatus = EX_OSERR;
1012
free(direntries[i]);
1013
979
goto fallback;
1014
980
}
1015
981
ret = set_cloexec_flag(pipefd[1]);
1016
982
if(ret < 0){
1017
983
error(0, errno, "set_cloexec_flag");
1018
close(pipefd[0]);
1019
close(pipefd[1]);
1020
984
exitstatus = EX_OSERR;
1021
free(direntries[i]);
1022
985
goto fallback;
1023
986
}
1024
#endif /* not O_CLOEXEC */
1025
987
/* Block SIGCHLD until process is safely in process list */
1026
988
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1027
989
&sigchld_action.sa_mask,
1029
991
if(ret < 0){
1030
992
error(0, errno, "sigprocmask");
1031
993
exitstatus = EX_OSERR;
1032
free(direntries[i]);
1033
994
goto fallback;
1034
995
}
1035
996
/* Starting a new process to be watched */
1039
1000
} while(pid == -1 and errno == EINTR);
1040
1001
if(pid == -1){
1041
1002
error(0, errno, "fork");
1042
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1043
&sigchld_action.sa_mask, NULL));
1044
close(pipefd[0]);
1045
close(pipefd[1]);
1046
1003
exitstatus = EX_OSERR;
1047
free(direntries[i]);
1048
1004
goto fallback;
1049
1005
}
1050
1006
if(pid == 0){
1066
1022
_exit(EX_OSERR);
1067
1023
}
1068
1024
1069
if(fexecve(plugin_fd, p->argv,
1070
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1071
error(0, errno, "fexecve for %s/%s",
1072
plugindir != NULL ? plugindir : PDIR,
1073
direntries[i]->d_name);
1074
_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
}
1075
1040
}
1076
1041
/* no return */
1077
1042
}
1078
1043
/* Parent process */
1079
close(pipefd[1]); /* Close unused write end of pipe */
1080
close(plugin_fd);
1081
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);
1082
1048
if(new_plugin == NULL){
1083
1049
error(0, errno, "getplugin");
1084
1050
ret = (int)(TEMP_FAILURE_RETRY
1088
1054
error(0, errno, "sigprocmask");
1089
1055
}
1090
1056
exitstatus = EX_OSERR;
1091
free(direntries[i]);
1092
1057
goto fallback;
1093
1058
}
1094
free(direntries[i]);
1095
1059
1096
1060
new_plugin->pid = pid;
1097
1061
new_plugin->fd = pipefd[0];
1098
1099
if(debug){
1100
fprintf(stderr, "Plugin %s started (PID %" PRIdMAX ")\n",
1101
new_plugin->name, (intmax_t) (new_plugin->pid));
1102
}
1103
1062
1104
1063
/* Unblock SIGCHLD so signal handler can be run if this process
1105
1064
has already completed */
1106
1065
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1112
1071
goto fallback;
1113
1072
}
1114
1073
1115
FD_SET(new_plugin->fd, &rfds_all);
1074
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1075
-Wconversion */
1116
1076
1117
1077
if(maxfd < new_plugin->fd){
1118
1078
maxfd = new_plugin->fd;
1119
1079
}
1120
1080
}
1121
1081
1122
free(direntries);
1123
direntries = NULL;
1124
close(dir_fd);
1125
dir_fd = -1;
1082
TEMP_FAILURE_RETRY(closedir(dir));
1083
dir = NULL;
1126
1084
free_plugin(getplugin(NULL));
1127
1085
1128
1086
for(plugin *p = plugin_list; p != NULL; p = p->next){
1167
1125
(intmax_t) (proc->pid),
1168
1126
WTERMSIG(proc->status),
1169
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));
1170
1131
}
1171
1132
}
1172
1133
1173
1134
/* Remove the plugin */
1174
FD_CLR(proc->fd, &rfds_all);
1135
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1136
-Wconversion */
1175
1137
1176
1138
/* Block signal while modifying process_list */
1177
1139
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1217
1179
}
1218
1180
1219
1181
/* This process has not completed. Does it have any output? */
1220
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 */
1221
1185
/* This process had nothing to say at this time */
1222
1186
proc = proc->next;
1223
1187
continue;
1224
1188
}
1225
1189
/* Before reading, make the process' data buffer large enough */
1226
1190
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1227
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1228
+ (size_t) BUFFER_SIZE);
1229
if(new_buffer == NULL){
1191
proc->buffer = realloc(proc->buffer, proc->buffer_size
1192
+ (size_t) BUFFER_SIZE);
1193
if(proc->buffer == NULL){
1230
1194
error(0, errno, "malloc");
1231
1195
exitstatus = EX_OSERR;
1232
1196
goto fallback;
1233
1197
}
1234
proc->buffer = new_buffer;
1235
1198
proc->buffer_size += BUFFER_SIZE;
1236
1199
}
1237
1200
/* Read from the process */
1290
1253
free(custom_argv);
1291
1254
}
1292
1255
1293
free(direntries);
1294
1295
if(dir_fd != -1){
1296
close(dir_fd);
1256
if(dir != NULL){
1257
closedir(dir);
1297
1258
}
1298
1259
1299
1260
/* Kill the processes */
1319
1280
free_plugin_list();
1320
1281
1321
1282
free(plugindir);
1322
free(pluginhelperdir);
1323
1283
free(argfile);
1324
1284
1325
1285
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0