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- Committer: Teddy Hogeborn
- Date: 2019-04-09 22:31:23 UTC
- Revision ID: teddy@recompile.se-20190409223123-wjj0jw08p09kzd4w
Debian package: Fix backports package dependency adjuster
* debian/rules (override_dh_shlibdeps-arch): Add "--in-place" to "sed"
options.
* debian/rules (override_dh_shlibdeps-arch): Add "--in-place" to "sed"
options.
- files added:
- bugs.xml
- debian/upstream
- plugin-helpers
- files removed:
- initramfs-tools-hook-conf
- files modified:
- .bzrignore
added
removed
plugin-runner.c
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2008-2011 Teddy Hogeborn
6
* Copyright © 2008-2011 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){
306
313
__attribute__((nonnull))
307
314
static void free_plugin(plugin *plugin_node){
308
315
309
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
316
for(char **arg = (plugin_node->argv)+1; *arg != NULL; arg++){
310
317
free(*arg);
311
318
}
319
free(plugin_node->name);
312
320
free(plugin_node->argv);
313
321
for(char **env = plugin_node->environ; *env != NULL; env++){
314
322
free(*env);
341
349
342
350
int main(int argc, char *argv[]){
343
351
char *plugindir = NULL;
352
char *pluginhelperdir = NULL;
344
353
char *argfile = NULL;
345
354
FILE *conffp;
346
size_t d_name_len;
347
DIR *dir = NULL;
348
struct dirent *dirst;
355
struct dirent **direntries = NULL;
349
356
struct stat st;
350
357
fd_set rfds_all;
351
358
int ret, maxfd = 0;
359
366
.sa_flags = SA_NOCLDSTOP };
360
367
char **custom_argv = NULL;
361
368
int custom_argc = 0;
369
int dir_fd = -1;
362
370
363
371
/* Establish a signal handler */
364
372
sigemptyset(&sigchld_action.sa_mask);
409
417
.doc = "Group ID the plugins will run as", .group = 3 },
410
418
{ .name = "debug", .key = 132,
411
419
.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 },
412
424
/*
413
425
* These reproduce what we would get without ARGP_NO_HELP
414
426
*/
435
447
break;
436
448
}
437
449
}
450
errno = 0;
438
451
}
439
452
break;
440
453
case 'G': /* --global-env */
441
add_environment(getplugin(NULL), arg, true);
454
if(add_environment(getplugin(NULL), arg, true)){
455
errno = 0;
456
}
442
457
break;
443
458
case 'o': /* --options-for */
444
459
{
461
476
break;
462
477
}
463
478
}
479
errno = 0;
464
480
}
465
481
break;
466
482
case 'E': /* --env-for */
478
494
errno = EINVAL;
479
495
break;
480
496
}
481
add_environment(getplugin(arg), envdef, true);
497
if(add_environment(getplugin(arg), envdef, true)){
498
errno = 0;
499
}
482
500
}
483
501
break;
484
502
case 'd': /* --disable */
486
504
plugin *p = getplugin(arg);
487
505
if(p != NULL){
488
506
p->disabled = true;
507
errno = 0;
489
508
}
490
509
}
491
510
break;
494
513
plugin *p = getplugin(arg);
495
514
if(p != NULL){
496
515
p->disabled = false;
516
errno = 0;
497
517
}
498
518
}
499
519
break;
500
520
case 128: /* --plugin-dir */
501
521
free(plugindir);
502
522
plugindir = strdup(arg);
523
if(plugindir != NULL){
524
errno = 0;
525
}
503
526
break;
504
527
case 129: /* --config-file */
505
528
/* This is already done by parse_opt_config_file() */
513
536
break;
514
537
}
515
538
uid = (uid_t)tmp_id;
539
errno = 0;
516
540
break;
517
541
case 131: /* --groupid */
518
542
tmp_id = strtoimax(arg, &tmp, 10);
523
547
break;
524
548
}
525
549
gid = (gid_t)tmp_id;
550
errno = 0;
526
551
break;
527
552
case 132: /* --debug */
528
553
debug = true;
529
554
break;
555
case 133: /* --plugin-helper-dir */
556
free(pluginhelperdir);
557
pluginhelperdir = strdup(arg);
558
if(pluginhelperdir != NULL){
559
errno = 0;
560
}
561
break;
530
562
/*
531
563
* These reproduce what we would get without ARGP_NO_HELP
532
564
*/
533
565
case '?': /* --help */
534
566
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
535
567
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
568
__builtin_unreachable();
536
569
case -3: /* --usage */
537
570
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
538
571
argp_state_help(state, state->out_stream,
539
572
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
573
__builtin_unreachable();
540
574
case 'V': /* --version */
541
575
fprintf(state->out_stream, "%s\n", argp_program_version);
542
576
exit(EXIT_SUCCESS);
552
586
if(arg[0] == '\0'){
553
587
break;
554
588
}
589
/* FALLTHROUGH */
555
590
default:
556
591
return ARGP_ERR_UNKNOWN;
557
592
}
576
611
case 129: /* --config-file */
577
612
free(argfile);
578
613
argfile = strdup(arg);
614
if(argfile != NULL){
615
errno = 0;
616
}
579
617
break;
580
618
case 130: /* --userid */
581
619
case 131: /* --groupid */
582
620
case 132: /* --debug */
621
case 133: /* --plugin-helper-dir */
583
622
case '?': /* --help */
584
623
case -3: /* --usage */
585
624
case 'V': /* --version */
664
703
}
665
704
666
705
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;
706
{
707
char **new_argv = realloc(custom_argv, sizeof(char *)
708
* ((size_t)custom_argc + 1));
709
if(new_argv == NULL){
710
error(0, errno, "realloc");
711
exitstatus = EX_OSERR;
712
free(new_arg);
713
free(org_line);
714
goto fallback;
715
} else {
716
custom_argv = new_argv;
717
}
674
718
}
675
719
custom_argv[custom_argc-1] = new_arg;
676
720
custom_argv[custom_argc] = NULL;
734
778
goto fallback;
735
779
}
736
780
781
{
782
char *pluginhelperenv;
783
bool bret = true;
784
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
785
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
786
if(ret != -1){
787
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
788
}
789
if(ret == -1 or not bret){
790
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
791
" environment variable to \"%s\" for all plugins\n",
792
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
793
}
794
if(ret != -1){
795
free(pluginhelperenv);
796
}
797
}
798
737
799
if(debug){
738
for(plugin *p = plugin_list; p != NULL; p=p->next){
800
for(plugin *p = plugin_list; p != NULL; p = p->next){
739
801
fprintf(stderr, "Plugin: %s has %d arguments\n",
740
802
p->name ? p->name : "Global", p->argc - 1);
741
803
for(char **a = p->argv; *a != NULL; a++){
750
812
751
813
if(getuid() == 0){
752
814
/* Work around Debian bug #633582:
753
<http://bugs.debian.org/633582> */
815
<https://bugs.debian.org/633582> */
754
816
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
755
817
if(plugindir_fd == -1){
756
error(0, errno, "open");
818
if(errno != ENOENT){
819
error(0, errno, "open(\"" PDIR "\")");
820
}
757
821
} else {
758
822
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
759
823
if(ret == -1){
766
830
}
767
831
}
768
832
}
769
TEMP_FAILURE_RETRY(close(plugindir_fd));
833
close(plugindir_fd);
770
834
}
771
835
}
772
836
773
837
/* Lower permissions */
774
setgid(gid);
838
ret = setgid(gid);
775
839
if(ret == -1){
776
840
error(0, errno, "setgid");
777
841
}
782
846
783
847
/* Open plugin directory with close_on_exec flag */
784
848
{
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
}
849
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
850
#ifdef O_CLOEXEC
851
O_CLOEXEC
852
#else /* not O_CLOEXEC */
853
0
854
#endif /* not O_CLOEXEC */
855
);
803
856
if(dir_fd == -1){
804
857
error(0, errno, "Could not open plugin dir");
805
858
exitstatus = EX_UNAVAILABLE;
811
864
ret = set_cloexec_flag(dir_fd);
812
865
if(ret < 0){
813
866
error(0, errno, "set_cloexec_flag");
814
TEMP_FAILURE_RETRY(close(dir_fd));
815
867
exitstatus = EX_OSERR;
816
868
goto fallback;
817
869
}
818
870
#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;
871
}
872
873
int good_name(const struct dirent * const dirent){
874
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
875
"*.dpkg-old", "*.dpkg-bak",
876
"*.dpkg-divert", NULL };
877
#ifdef __GNUC__
878
#pragma GCC diagnostic push
879
#pragma GCC diagnostic ignored "-Wcast-qual"
880
#endif
881
for(const char **pat = (const char **)patterns;
882
*pat != NULL; pat++){
883
#ifdef __GNUC__
884
#pragma GCC diagnostic pop
885
#endif
886
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
887
!= FNM_NOMATCH){
888
if(debug){
889
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
890
" matching pattern %s\n", dirent->d_name, *pat);
891
}
892
return 0;
893
}
826
894
}
895
return 1;
896
}
897
898
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
899
alphasort);
900
if(numplugins == -1){
901
error(0, errno, "Could not scan plugin dir");
902
direntries = NULL;
903
exitstatus = EX_OSERR;
904
goto fallback;
827
905
}
828
906
829
907
FD_ZERO(&rfds_all);
830
908
831
909
/* 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");
910
for(int i = 0; i < numplugins; i++){
911
912
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
913
if(plugin_fd == -1){
914
error(0, errno, "Could not open plugin");
915
free(direntries[i]);
904
916
continue;
905
917
}
906
907
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
918
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
908
919
if(ret == -1){
909
920
error(0, errno, "stat");
910
free(filename);
921
close(plugin_fd);
922
free(direntries[i]);
911
923
continue;
912
924
}
913
925
914
926
/* Ignore non-executable files */
915
927
if(not S_ISREG(st.st_mode)
916
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
928
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
929
X_OK, 0)) != 0)){
917
930
if(debug){
918
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
919
" with bad type or mode\n", filename);
931
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
932
" with bad type or mode\n",
933
plugindir != NULL ? plugindir : PDIR,
934
direntries[i]->d_name);
920
935
}
921
free(filename);
936
close(plugin_fd);
937
free(direntries[i]);
922
938
continue;
923
939
}
924
940
925
plugin *p = getplugin(dirst->d_name);
941
plugin *p = getplugin(direntries[i]->d_name);
926
942
if(p == NULL){
927
943
error(0, errno, "getplugin");
928
free(filename);
944
close(plugin_fd);
945
free(direntries[i]);
929
946
continue;
930
947
}
931
948
if(p->disabled){
932
949
if(debug){
933
950
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
934
dirst->d_name);
951
direntries[i]->d_name);
935
952
}
936
free(filename);
953
close(plugin_fd);
954
free(direntries[i]);
937
955
continue;
938
956
}
939
957
{
953
971
}
954
972
}
955
973
}
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. */
974
/* If this plugin has any environment variables, we need to
975
duplicate the environment from this process, too. */
959
976
if(p->environ[0] != NULL){
960
977
for(char **e = environ; *e != NULL; e++){
961
978
if(not add_environment(p, *e, false)){
965
982
}
966
983
967
984
int pipefd[2];
985
#ifndef O_CLOEXEC
968
986
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
987
#else /* O_CLOEXEC */
988
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
989
#endif /* O_CLOEXEC */
969
990
if(ret == -1){
970
991
error(0, errno, "pipe");
971
992
exitstatus = EX_OSERR;
972
goto fallback;
973
}
993
free(direntries[i]);
994
goto fallback;
995
}
996
if(pipefd[0] >= FD_SETSIZE){
997
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
998
FD_SETSIZE);
999
close(pipefd[0]);
1000
close(pipefd[1]);
1001
exitstatus = EX_OSERR;
1002
free(direntries[i]);
1003
goto fallback;
1004
}
1005
#ifndef O_CLOEXEC
974
1006
/* Ask OS to automatic close the pipe on exec */
975
1007
ret = set_cloexec_flag(pipefd[0]);
976
1008
if(ret < 0){
977
1009
error(0, errno, "set_cloexec_flag");
1010
close(pipefd[0]);
1011
close(pipefd[1]);
978
1012
exitstatus = EX_OSERR;
1013
free(direntries[i]);
979
1014
goto fallback;
980
1015
}
981
1016
ret = set_cloexec_flag(pipefd[1]);
982
1017
if(ret < 0){
983
1018
error(0, errno, "set_cloexec_flag");
1019
close(pipefd[0]);
1020
close(pipefd[1]);
984
1021
exitstatus = EX_OSERR;
1022
free(direntries[i]);
985
1023
goto fallback;
986
1024
}
1025
#endif /* not O_CLOEXEC */
987
1026
/* Block SIGCHLD until process is safely in process list */
988
1027
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
989
1028
&sigchld_action.sa_mask,
991
1030
if(ret < 0){
992
1031
error(0, errno, "sigprocmask");
993
1032
exitstatus = EX_OSERR;
1033
free(direntries[i]);
994
1034
goto fallback;
995
1035
}
996
1036
/* Starting a new process to be watched */
1000
1040
} while(pid == -1 and errno == EINTR);
1001
1041
if(pid == -1){
1002
1042
error(0, errno, "fork");
1043
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1044
&sigchld_action.sa_mask, NULL));
1045
close(pipefd[0]);
1046
close(pipefd[1]);
1003
1047
exitstatus = EX_OSERR;
1048
free(direntries[i]);
1004
1049
goto fallback;
1005
1050
}
1006
1051
if(pid == 0){
1022
1067
_exit(EX_OSERR);
1023
1068
}
1024
1069
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
}
1070
if(fexecve(plugin_fd, p->argv,
1071
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1072
error(0, errno, "fexecve for %s/%s",
1073
plugindir != NULL ? plugindir : PDIR,
1074
direntries[i]->d_name);
1075
_exit(EX_OSERR);
1040
1076
}
1041
1077
/* no return */
1042
1078
}
1043
1079
/* 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);
1080
close(pipefd[1]); /* Close unused write end of pipe */
1081
close(plugin_fd);
1082
plugin *new_plugin = getplugin(direntries[i]->d_name);
1048
1083
if(new_plugin == NULL){
1049
1084
error(0, errno, "getplugin");
1050
1085
ret = (int)(TEMP_FAILURE_RETRY
1054
1089
error(0, errno, "sigprocmask");
1055
1090
}
1056
1091
exitstatus = EX_OSERR;
1092
free(direntries[i]);
1057
1093
goto fallback;
1058
1094
}
1095
free(direntries[i]);
1059
1096
1060
1097
new_plugin->pid = pid;
1061
1098
new_plugin->fd = pipefd[0];
1062
1099
1100
if(debug){
1101
fprintf(stderr, "Plugin %s started (PID %" PRIdMAX ")\n",
1102
new_plugin->name, (intmax_t) (new_plugin->pid));
1103
}
1104
1063
1105
/* Unblock SIGCHLD so signal handler can be run if this process
1064
1106
has already completed */
1065
1107
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1071
1113
goto fallback;
1072
1114
}
1073
1115
1074
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1075
-Wconversion */
1116
FD_SET(new_plugin->fd, &rfds_all);
1076
1117
1077
1118
if(maxfd < new_plugin->fd){
1078
1119
maxfd = new_plugin->fd;
1079
1120
}
1080
1121
}
1081
1122
1082
TEMP_FAILURE_RETRY(closedir(dir));
1083
dir = NULL;
1123
free(direntries);
1124
direntries = NULL;
1125
close(dir_fd);
1126
dir_fd = -1;
1084
1127
free_plugin(getplugin(NULL));
1085
1128
1086
1129
for(plugin *p = plugin_list; p != NULL; p = p->next){
1125
1168
(intmax_t) (proc->pid),
1126
1169
WTERMSIG(proc->status),
1127
1170
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
1171
}
1132
1172
}
1133
1173
1134
1174
/* Remove the plugin */
1135
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1136
-Wconversion */
1175
FD_CLR(proc->fd, &rfds_all);
1137
1176
1138
1177
/* Block signal while modifying process_list */
1139
1178
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1179
1218
}
1180
1219
1181
1220
/* 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 */
1221
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1185
1222
/* This process had nothing to say at this time */
1186
1223
proc = proc->next;
1187
1224
continue;
1188
1225
}
1189
1226
/* Before reading, make the process' data buffer large enough */
1190
1227
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){
1228
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1229
+ (size_t) BUFFER_SIZE);
1230
if(new_buffer == NULL){
1194
1231
error(0, errno, "malloc");
1195
1232
exitstatus = EX_OSERR;
1196
1233
goto fallback;
1197
1234
}
1235
proc->buffer = new_buffer;
1198
1236
proc->buffer_size += BUFFER_SIZE;
1199
1237
}
1200
1238
/* Read from the process */
1253
1291
free(custom_argv);
1254
1292
}
1255
1293
1256
if(dir != NULL){
1257
closedir(dir);
1294
free(direntries);
1295
1296
if(dir_fd != -1){
1297
close(dir_fd);
1258
1298
}
1259
1299
1260
1300
/* Kill the processes */
1280
1320
free_plugin_list();
1281
1321
1282
1322
free(plugindir);
1323
free(pluginhelperdir);
1283
1324
free(argfile);
1284
1325
1285
1326
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0