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- Committer: Teddy Hogeborn
- Date: 2011-07-25 18:50:00 UTC
- mfrom: (24.1.176 mandos)
- Revision ID: teddy@fukt.bsnet.se-20110725185000-paes3keuo0dj4m0z
Merge from Björn.
- files added:
- initramfs-tools-hook-conf
- files removed:
- bugs.xml
- debian/tests
- debian/upstream
- dracut-module
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
plugin-runner.c
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2008-2018 Teddy Hogeborn
6
* Copyright © 2008-2018 Björn Påhlsson
7
*
8
* This file is part of Mandos.
9
*
10
* Mandos is free software: you can redistribute it and/or modify it
11
* under the terms of the GNU General Public License as published by
12
* the Free Software Foundation, either version 3 of the License, or
13
* (at your option) any later version.
14
*
15
* Mandos is distributed in the hope that it will be useful, but
5
* Copyright © 2008-2010 Teddy Hogeborn
6
* Copyright © 2008-2010 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
* Contact the authors at <mandos@recompile.se>.
22
* Contact the authors at <mandos@fukt.bsnet.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
#include <stdlib.h> /* malloc(), reallocarray(), realloc(),
30
EXIT_SUCCESS, exit() */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
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;
83
const char *argp_program_bug_address = "<mandos@recompile.se>";
82
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
84
83
85
84
typedef struct plugin{
86
85
char *name; /* can be NULL or any plugin name */
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))
177
174
static bool add_to_char_array(const char *new, char ***array,
178
175
int *len){
179
176
/* Resize the pointed-to array to hold one more pointer */
180
char **new_array = NULL;
181
177
do {
182
#if defined(__GLIBC_PREREQ) and __GLIBC_PREREQ(2, 26)
183
new_array = reallocarray(*array, (size_t)((*len) + 2),
184
sizeof(char *));
185
#else
186
if(((size_t)((*len) + 2)) > (SIZE_MAX / sizeof(char *))){
187
/* overflow */
188
new_array = NULL;
189
errno = ENOMEM;
190
} else {
191
new_array = realloc(*array, (size_t)((*len) + 2)
192
* sizeof(char *));
193
}
194
#endif
195
} while(new_array == NULL and errno == EINTR);
178
*array = realloc(*array, sizeof(char *)
179
* (size_t) ((*len) + 2));
180
} while(*array == NULL and errno == EINTR);
196
181
/* Malloc check */
197
if(new_array == NULL){
182
if(*array == NULL){
198
183
return false;
199
184
}
200
*array = new_array;
201
185
/* Make a copy of the new string */
202
186
char *copy;
203
187
do {
215
199
}
216
200
217
201
/* Add to a plugin's argument vector */
218
__attribute__((nonnull(2), warn_unused_result))
219
202
static bool add_argument(plugin *p, const char *arg){
220
203
if(p == NULL){
221
204
return false;
224
207
}
225
208
226
209
/* Add to a plugin's environment */
227
__attribute__((nonnull(2), warn_unused_result))
228
210
static bool add_environment(plugin *p, const char *def, bool replace){
229
211
if(p == NULL){
230
212
return false;
232
214
/* namelen = length of name of environment variable */
233
215
size_t namelen = (size_t)(strchrnul(def, '=') - def);
234
216
/* Search for this environment variable */
235
for(char **envdef = p->environ; *envdef != NULL; envdef++){
236
if(strncmp(*envdef, def, namelen + 1) == 0){
217
for(char **e = p->environ; *e != NULL; e++){
218
if(strncmp(*e, def, namelen + 1) == 0){
237
219
/* It already exists */
238
220
if(replace){
239
char *new_envdef;
221
char *new;
240
222
do {
241
new_envdef = realloc(*envdef, strlen(def) + 1);
242
} while(new_envdef == NULL and errno == EINTR);
243
if(new_envdef == NULL){
223
new = realloc(*e, strlen(def) + 1);
224
} while(new == NULL and errno == EINTR);
225
if(new == NULL){
244
226
return false;
245
227
}
246
*envdef = new_envdef;
247
strcpy(*envdef, def);
228
*e = new;
229
strcpy(*e, def);
248
230
}
249
231
return true;
250
232
}
252
234
return add_to_char_array(def, &(p->environ), &(p->envc));
253
235
}
254
236
255
#ifndef O_CLOEXEC
256
237
/*
257
238
* Based on the example in the GNU LibC manual chapter 13.13 "File
258
239
* Descriptor Flags".
259
240
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
260
241
*/
261
__attribute__((warn_unused_result))
262
242
static int set_cloexec_flag(int fd){
263
243
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
264
244
/* If reading the flags failed, return error indication now. */
269
249
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
270
250
ret | FD_CLOEXEC));
271
251
}
272
#endif /* not O_CLOEXEC */
273
252
274
253
275
254
/* Mark processes as completed when they exit, and save their exit
307
286
}
308
287
309
288
/* Prints out a password to stdout */
310
__attribute__((nonnull, warn_unused_result))
311
289
static bool print_out_password(const char *buffer, size_t length){
312
290
ssize_t ret;
313
291
for(size_t written = 0; written < length; written += (size_t)ret){
321
299
}
322
300
323
301
/* Removes and free a plugin from the plugin list */
324
__attribute__((nonnull))
325
302
static void free_plugin(plugin *plugin_node){
326
303
327
for(char **arg = (plugin_node->argv)+1; *arg != NULL; arg++){
304
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
328
305
free(*arg);
329
306
}
330
free(plugin_node->name);
331
307
free(plugin_node->argv);
332
308
for(char **env = plugin_node->environ; *env != NULL; env++){
333
309
free(*env);
360
336
361
337
int main(int argc, char *argv[]){
362
338
char *plugindir = NULL;
363
char *pluginhelperdir = NULL;
364
339
char *argfile = NULL;
365
340
FILE *conffp;
366
struct dirent **direntries = NULL;
341
size_t d_name_len;
342
DIR *dir = NULL;
343
struct dirent *dirst;
367
344
struct stat st;
368
345
fd_set rfds_all;
369
346
int ret, maxfd = 0;
377
354
.sa_flags = SA_NOCLDSTOP };
378
355
char **custom_argv = NULL;
379
356
int custom_argc = 0;
380
int dir_fd = -1;
381
357
382
358
/* Establish a signal handler */
383
359
sigemptyset(&sigchld_action.sa_mask);
428
404
.doc = "Group ID the plugins will run as", .group = 3 },
429
405
{ .name = "debug", .key = 132,
430
406
.doc = "Debug mode", .group = 4 },
431
{ .name = "plugin-helper-dir", .key = 133,
432
.arg = "DIRECTORY",
433
.doc = "Specify a different plugin helper directory",
434
.group = 2 },
435
407
/*
436
408
* These reproduce what we would get without ARGP_NO_HELP
437
409
*/
444
416
{ .name = NULL }
445
417
};
446
418
447
__attribute__((nonnull(3)))
448
419
error_t parse_opt(int key, char *arg, struct argp_state *state){
449
420
errno = 0;
450
421
switch(key){
451
422
char *tmp;
452
intmax_t tmp_id;
423
intmax_t tmpmax;
453
424
case 'g': /* --global-options */
454
425
{
455
426
char *plugin_option;
458
429
break;
459
430
}
460
431
}
461
errno = 0;
462
432
}
463
433
break;
464
434
case 'G': /* --global-env */
465
if(add_environment(getplugin(NULL), arg, true)){
466
errno = 0;
467
}
435
add_environment(getplugin(NULL), arg, true);
468
436
break;
469
437
case 'o': /* --options-for */
470
438
{
487
455
break;
488
456
}
489
457
}
490
errno = 0;
491
458
}
492
459
break;
493
460
case 'E': /* --env-for */
505
472
errno = EINVAL;
506
473
break;
507
474
}
508
if(add_environment(getplugin(arg), envdef, true)){
509
errno = 0;
510
}
475
add_environment(getplugin(arg), envdef, true);
511
476
}
512
477
break;
513
478
case 'd': /* --disable */
515
480
plugin *p = getplugin(arg);
516
481
if(p != NULL){
517
482
p->disabled = true;
518
errno = 0;
519
483
}
520
484
}
521
485
break;
524
488
plugin *p = getplugin(arg);
525
489
if(p != NULL){
526
490
p->disabled = false;
527
errno = 0;
528
491
}
529
492
}
530
493
break;
531
494
case 128: /* --plugin-dir */
532
495
free(plugindir);
533
496
plugindir = strdup(arg);
534
if(plugindir != NULL){
535
errno = 0;
536
}
537
497
break;
538
498
case 129: /* --config-file */
539
499
/* This is already done by parse_opt_config_file() */
540
500
break;
541
501
case 130: /* --userid */
542
tmp_id = strtoimax(arg, &tmp, 10);
502
tmpmax = strtoimax(arg, &tmp, 10);
543
503
if(errno != 0 or tmp == arg or *tmp != '\0'
544
or tmp_id != (uid_t)tmp_id){
504
or tmpmax != (uid_t)tmpmax){
545
505
argp_error(state, "Bad user ID number: \"%s\", using %"
546
506
PRIdMAX, arg, (intmax_t)uid);
547
507
break;
548
508
}
549
uid = (uid_t)tmp_id;
550
errno = 0;
509
uid = (uid_t)tmpmax;
551
510
break;
552
511
case 131: /* --groupid */
553
tmp_id = strtoimax(arg, &tmp, 10);
512
tmpmax = strtoimax(arg, &tmp, 10);
554
513
if(errno != 0 or tmp == arg or *tmp != '\0'
555
or tmp_id != (gid_t)tmp_id){
514
or tmpmax != (gid_t)tmpmax){
556
515
argp_error(state, "Bad group ID number: \"%s\", using %"
557
516
PRIdMAX, arg, (intmax_t)gid);
558
517
break;
559
518
}
560
gid = (gid_t)tmp_id;
561
errno = 0;
519
gid = (gid_t)tmpmax;
562
520
break;
563
521
case 132: /* --debug */
564
522
debug = true;
565
523
break;
566
case 133: /* --plugin-helper-dir */
567
free(pluginhelperdir);
568
pluginhelperdir = strdup(arg);
569
if(pluginhelperdir != NULL){
570
errno = 0;
571
}
572
break;
573
524
/*
574
525
* These reproduce what we would get without ARGP_NO_HELP
575
526
*/
576
527
case '?': /* --help */
577
528
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
578
529
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
579
__builtin_unreachable();
580
530
case -3: /* --usage */
581
531
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
582
532
argp_state_help(state, state->out_stream,
583
533
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
584
__builtin_unreachable();
585
534
case 'V': /* --version */
586
535
fprintf(state->out_stream, "%s\n", argp_program_version);
587
536
exit(EXIT_SUCCESS);
597
546
if(arg[0] == '\0'){
598
547
break;
599
548
}
600
#if __GNUC__ >= 7
601
__attribute__((fallthrough));
602
#else
603
/* FALLTHROUGH */
604
#endif
605
549
default:
606
550
return ARGP_ERR_UNKNOWN;
607
551
}
626
570
case 129: /* --config-file */
627
571
free(argfile);
628
572
argfile = strdup(arg);
629
if(argfile != NULL){
630
errno = 0;
631
}
632
573
break;
633
574
case 130: /* --userid */
634
575
case 131: /* --groupid */
635
576
case 132: /* --debug */
636
case 133: /* --plugin-helper-dir */
637
577
case '?': /* --help */
638
578
case -3: /* --usage */
639
579
case 'V': /* --version */
718
658
}
719
659
720
660
custom_argc += 1;
721
{
722
#if defined(__GLIBC_PREREQ) and __GLIBC_PREREQ(2, 26)
723
char **new_argv = reallocarray(custom_argv, (size_t)custom_argc + 1,
724
sizeof(char *));
725
#else
726
char **new_argv = NULL;
727
if(((size_t)custom_argc + 1) > (SIZE_MAX / sizeof(char *))){
728
/* overflow */
729
errno = ENOMEM;
730
} else {
731
new_argv = realloc(custom_argv, ((size_t)custom_argc + 1)
732
* sizeof(char *));
733
}
734
#endif
735
if(new_argv == NULL){
736
error(0, errno, "reallocarray");
737
exitstatus = EX_OSERR;
738
free(new_arg);
739
free(org_line);
740
goto fallback;
741
} else {
742
custom_argv = new_argv;
743
}
661
custom_argv = realloc(custom_argv, sizeof(char *)
662
* ((unsigned int) custom_argc + 1));
663
if(custom_argv == NULL){
664
error(0, errno, "realloc");
665
exitstatus = EX_OSERR;
666
free(org_line);
667
goto fallback;
744
668
}
745
669
custom_argv[custom_argc-1] = new_arg;
746
670
custom_argv[custom_argc] = NULL;
804
728
goto fallback;
805
729
}
806
730
807
{
808
char *pluginhelperenv;
809
bool bret = true;
810
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
811
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
812
if(ret != -1){
813
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
814
}
815
if(ret == -1 or not bret){
816
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
817
" environment variable to \"%s\" for all plugins\n",
818
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
819
}
820
if(ret != -1){
821
free(pluginhelperenv);
822
}
823
}
824
825
731
if(debug){
826
for(plugin *p = plugin_list; p != NULL; p = p->next){
732
for(plugin *p = plugin_list; p != NULL; p=p->next){
827
733
fprintf(stderr, "Plugin: %s has %d arguments\n",
828
734
p->name ? p->name : "Global", p->argc - 1);
829
735
for(char **a = p->argv; *a != NULL; a++){
836
742
}
837
743
}
838
744
839
if(getuid() == 0){
745
{
840
746
/* Work around Debian bug #633582:
841
<https://bugs.debian.org/633582> */
747
<http://bugs.debian.org/633582> */
842
748
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
843
749
if(plugindir_fd == -1){
844
if(errno != ENOENT){
845
error(0, errno, "open(\"" PDIR "\")");
846
}
750
error(0, errno, "open");
847
751
} else {
848
752
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
849
753
if(ret == -1){
856
760
}
857
761
}
858
762
}
859
close(plugindir_fd);
763
TEMP_FAILURE_RETRY(close(plugindir_fd));
860
764
}
861
765
}
862
766
863
767
/* Lower permissions */
864
ret = setgid(gid);
768
setgid(gid);
865
769
if(ret == -1){
866
770
error(0, errno, "setgid");
867
771
}
872
776
873
777
/* Open plugin directory with close_on_exec flag */
874
778
{
875
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
876
#ifdef O_CLOEXEC
877
O_CLOEXEC
878
#else /* not O_CLOEXEC */
879
0
880
#endif /* not O_CLOEXEC */
881
);
779
int dir_fd = -1;
780
if(plugindir == NULL){
781
dir_fd = open(PDIR, O_RDONLY |
782
#ifdef O_CLOEXEC
783
O_CLOEXEC
784
#else /* not O_CLOEXEC */
785
0
786
#endif /* not O_CLOEXEC */
787
);
788
} else {
789
dir_fd = open(plugindir, O_RDONLY |
790
#ifdef O_CLOEXEC
791
O_CLOEXEC
792
#else /* not O_CLOEXEC */
793
0
794
#endif /* not O_CLOEXEC */
795
);
796
}
882
797
if(dir_fd == -1){
883
798
error(0, errno, "Could not open plugin dir");
884
799
exitstatus = EX_UNAVAILABLE;
890
805
ret = set_cloexec_flag(dir_fd);
891
806
if(ret < 0){
892
807
error(0, errno, "set_cloexec_flag");
808
TEMP_FAILURE_RETRY(close(dir_fd));
893
809
exitstatus = EX_OSERR;
894
810
goto fallback;
895
811
}
896
812
#endif /* O_CLOEXEC */
897
}
898
899
int good_name(const struct dirent * const dirent){
900
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
901
"*.dpkg-old", "*.dpkg-bak",
902
"*.dpkg-divert", NULL };
903
#ifdef __GNUC__
904
#pragma GCC diagnostic push
905
#pragma GCC diagnostic ignored "-Wcast-qual"
906
#endif
907
for(const char **pat = (const char **)patterns;
908
*pat != NULL; pat++){
909
#ifdef __GNUC__
910
#pragma GCC diagnostic pop
911
#endif
912
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
913
!= FNM_NOMATCH){
914
if(debug){
915
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
916
" matching pattern %s\n", dirent->d_name, *pat);
917
}
918
return 0;
919
}
813
814
dir = fdopendir(dir_fd);
815
if(dir == NULL){
816
error(0, errno, "Could not open plugin dir");
817
TEMP_FAILURE_RETRY(close(dir_fd));
818
exitstatus = EX_OSERR;
819
goto fallback;
920
820
}
921
return 1;
922
}
923
924
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
925
alphasort);
926
if(numplugins == -1){
927
error(0, errno, "Could not scan plugin dir");
928
direntries = NULL;
929
exitstatus = EX_OSERR;
930
goto fallback;
931
821
}
932
822
933
823
FD_ZERO(&rfds_all);
934
824
935
825
/* Read and execute any executable in the plugin directory*/
936
for(int i = 0; i < numplugins; i++){
937
938
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
939
if(plugin_fd == -1){
940
error(0, errno, "Could not open plugin");
941
free(direntries[i]);
826
while(true){
827
do {
828
dirst = readdir(dir);
829
} while(dirst == NULL and errno == EINTR);
830
831
/* All directory entries have been processed */
832
if(dirst == NULL){
833
if(errno == EBADF){
834
error(0, errno, "readdir");
835
exitstatus = EX_IOERR;
836
goto fallback;
837
}
838
break;
839
}
840
841
d_name_len = strlen(dirst->d_name);
842
843
/* Ignore dotfiles, backup files and other junk */
844
{
845
bool bad_name = false;
846
847
const char const *bad_prefixes[] = { ".", "#", NULL };
848
849
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
850
".dpkg-old",
851
".dpkg-bak",
852
".dpkg-divert", NULL };
853
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
854
size_t pre_len = strlen(*pre);
855
if((d_name_len >= pre_len)
856
and strncmp((dirst->d_name), *pre, pre_len) == 0){
857
if(debug){
858
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
859
" with bad prefix %s\n", dirst->d_name, *pre);
860
}
861
bad_name = true;
862
break;
863
}
864
}
865
if(bad_name){
866
continue;
867
}
868
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
869
size_t suf_len = strlen(*suf);
870
if((d_name_len >= suf_len)
871
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
872
== 0)){
873
if(debug){
874
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
875
" with bad suffix %s\n", dirst->d_name, *suf);
876
}
877
bad_name = true;
878
break;
879
}
880
}
881
882
if(bad_name){
883
continue;
884
}
885
}
886
887
char *filename;
888
if(plugindir == NULL){
889
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
890
dirst->d_name));
891
} else {
892
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
893
plugindir,
894
dirst->d_name));
895
}
896
if(ret < 0){
897
error(0, errno, "asprintf");
942
898
continue;
943
899
}
944
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
900
901
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
945
902
if(ret == -1){
946
903
error(0, errno, "stat");
947
close(plugin_fd);
948
free(direntries[i]);
904
free(filename);
949
905
continue;
950
906
}
951
907
952
908
/* Ignore non-executable files */
953
909
if(not S_ISREG(st.st_mode)
954
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
955
X_OK, 0)) != 0)){
910
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
956
911
if(debug){
957
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
958
" with bad type or mode\n",
959
plugindir != NULL ? plugindir : PDIR,
960
direntries[i]->d_name);
912
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
913
" with bad type or mode\n", filename);
961
914
}
962
close(plugin_fd);
963
free(direntries[i]);
915
free(filename);
964
916
continue;
965
917
}
966
918
967
plugin *p = getplugin(direntries[i]->d_name);
919
plugin *p = getplugin(dirst->d_name);
968
920
if(p == NULL){
969
921
error(0, errno, "getplugin");
970
close(plugin_fd);
971
free(direntries[i]);
922
free(filename);
972
923
continue;
973
924
}
974
925
if(p->disabled){
975
926
if(debug){
976
927
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
977
direntries[i]->d_name);
928
dirst->d_name);
978
929
}
979
close(plugin_fd);
980
free(direntries[i]);
930
free(filename);
981
931
continue;
982
932
}
983
933
{
997
947
}
998
948
}
999
949
}
1000
/* If this plugin has any environment variables, we need to
1001
duplicate the environment from this process, too. */
950
/* If this plugin has any environment variables, we will call
951
using execve and need to duplicate the environment from this
952
process, too. */
1002
953
if(p->environ[0] != NULL){
1003
954
for(char **e = environ; *e != NULL; e++){
1004
955
if(not add_environment(p, *e, false)){
1008
959
}
1009
960
1010
961
int pipefd[2];
1011
#ifndef O_CLOEXEC
1012
962
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
1013
#else /* O_CLOEXEC */
1014
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
1015
#endif /* O_CLOEXEC */
1016
963
if(ret == -1){
1017
964
error(0, errno, "pipe");
1018
965
exitstatus = EX_OSERR;
1019
free(direntries[i]);
1020
goto fallback;
1021
}
1022
if(pipefd[0] >= FD_SETSIZE){
1023
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
1024
FD_SETSIZE);
1025
close(pipefd[0]);
1026
close(pipefd[1]);
1027
exitstatus = EX_OSERR;
1028
free(direntries[i]);
1029
goto fallback;
1030
}
1031
#ifndef O_CLOEXEC
966
goto fallback;
967
}
1032
968
/* Ask OS to automatic close the pipe on exec */
1033
969
ret = set_cloexec_flag(pipefd[0]);
1034
970
if(ret < 0){
1035
971
error(0, errno, "set_cloexec_flag");
1036
close(pipefd[0]);
1037
close(pipefd[1]);
1038
972
exitstatus = EX_OSERR;
1039
free(direntries[i]);
1040
973
goto fallback;
1041
974
}
1042
975
ret = set_cloexec_flag(pipefd[1]);
1043
976
if(ret < 0){
1044
977
error(0, errno, "set_cloexec_flag");
1045
close(pipefd[0]);
1046
close(pipefd[1]);
1047
978
exitstatus = EX_OSERR;
1048
free(direntries[i]);
1049
979
goto fallback;
1050
980
}
1051
#endif /* not O_CLOEXEC */
1052
981
/* Block SIGCHLD until process is safely in process list */
1053
982
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1054
983
&sigchld_action.sa_mask,
1056
985
if(ret < 0){
1057
986
error(0, errno, "sigprocmask");
1058
987
exitstatus = EX_OSERR;
1059
free(direntries[i]);
1060
988
goto fallback;
1061
989
}
1062
990
/* Starting a new process to be watched */
1066
994
} while(pid == -1 and errno == EINTR);
1067
995
if(pid == -1){
1068
996
error(0, errno, "fork");
1069
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1070
&sigchld_action.sa_mask, NULL));
1071
close(pipefd[0]);
1072
close(pipefd[1]);
1073
997
exitstatus = EX_OSERR;
1074
free(direntries[i]);
1075
998
goto fallback;
1076
999
}
1077
1000
if(pid == 0){
1093
1016
_exit(EX_OSERR);
1094
1017
}
1095
1018
1096
if(fexecve(plugin_fd, p->argv,
1097
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1098
error(0, errno, "fexecve for %s/%s",
1099
plugindir != NULL ? plugindir : PDIR,
1100
direntries[i]->d_name);
1101
_exit(EX_OSERR);
1019
if(dirfd(dir) < 0){
1020
/* If dir has no file descriptor, we could not set FD_CLOEXEC
1021
above and must now close it manually here. */
1022
closedir(dir);
1023
}
1024
if(p->environ[0] == NULL){
1025
if(execv(filename, p->argv) < 0){
1026
error(0, errno, "execv for %s", filename);
1027
_exit(EX_OSERR);
1028
}
1029
} else {
1030
if(execve(filename, p->argv, p->environ) < 0){
1031
error(0, errno, "execve for %s", filename);
1032
_exit(EX_OSERR);
1033
}
1102
1034
}
1103
1035
/* no return */
1104
1036
}
1105
1037
/* Parent process */
1106
close(pipefd[1]); /* Close unused write end of pipe */
1107
close(plugin_fd);
1108
plugin *new_plugin = getplugin(direntries[i]->d_name);
1038
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1039
pipe */
1040
free(filename);
1041
plugin *new_plugin = getplugin(dirst->d_name);
1109
1042
if(new_plugin == NULL){
1110
1043
error(0, errno, "getplugin");
1111
1044
ret = (int)(TEMP_FAILURE_RETRY
1115
1048
error(0, errno, "sigprocmask");
1116
1049
}
1117
1050
exitstatus = EX_OSERR;
1118
free(direntries[i]);
1119
1051
goto fallback;
1120
1052
}
1121
free(direntries[i]);
1122
1053
1123
1054
new_plugin->pid = pid;
1124
1055
new_plugin->fd = pipefd[0];
1125
1126
if(debug){
1127
fprintf(stderr, "Plugin %s started (PID %" PRIdMAX ")\n",
1128
new_plugin->name, (intmax_t) (new_plugin->pid));
1129
}
1130
1056
1131
1057
/* Unblock SIGCHLD so signal handler can be run if this process
1132
1058
has already completed */
1133
1059
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1139
1065
goto fallback;
1140
1066
}
1141
1067
1142
FD_SET(new_plugin->fd, &rfds_all);
1068
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1069
-Wconversion */
1143
1070
1144
1071
if(maxfd < new_plugin->fd){
1145
1072
maxfd = new_plugin->fd;
1146
1073
}
1147
1074
}
1148
1075
1149
free(direntries);
1150
direntries = NULL;
1151
close(dir_fd);
1152
dir_fd = -1;
1076
TEMP_FAILURE_RETRY(closedir(dir));
1077
dir = NULL;
1153
1078
free_plugin(getplugin(NULL));
1154
1079
1155
1080
for(plugin *p = plugin_list; p != NULL; p = p->next){
1194
1119
(intmax_t) (proc->pid),
1195
1120
WTERMSIG(proc->status),
1196
1121
strsignal(WTERMSIG(proc->status)));
1122
} else if(WCOREDUMP(proc->status)){
1123
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1124
" core\n", proc->name, (intmax_t) (proc->pid));
1197
1125
}
1198
1126
}
1199
1127
1200
1128
/* Remove the plugin */
1201
FD_CLR(proc->fd, &rfds_all);
1129
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1130
-Wconversion */
1202
1131
1203
1132
/* Block signal while modifying process_list */
1204
1133
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1244
1173
}
1245
1174
1246
1175
/* This process has not completed. Does it have any output? */
1247
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1176
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1177
warning from
1178
-Wconversion */
1248
1179
/* This process had nothing to say at this time */
1249
1180
proc = proc->next;
1250
1181
continue;
1251
1182
}
1252
1183
/* Before reading, make the process' data buffer large enough */
1253
1184
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1254
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1255
+ (size_t) BUFFER_SIZE);
1256
if(new_buffer == NULL){
1185
proc->buffer = realloc(proc->buffer, proc->buffer_size
1186
+ (size_t) BUFFER_SIZE);
1187
if(proc->buffer == NULL){
1257
1188
error(0, errno, "malloc");
1258
1189
exitstatus = EX_OSERR;
1259
1190
goto fallback;
1260
1191
}
1261
proc->buffer = new_buffer;
1262
1192
proc->buffer_size += BUFFER_SIZE;
1263
1193
}
1264
1194
/* Read from the process */
1317
1247
free(custom_argv);
1318
1248
}
1319
1249
1320
free(direntries);
1321
1322
if(dir_fd != -1){
1323
close(dir_fd);
1250
if(dir != NULL){
1251
closedir(dir);
1324
1252
}
1325
1253
1326
1254
/* Kill the processes */
1346
1274
free_plugin_list();
1347
1275
1348
1276
free(plugindir);
1349
free(pluginhelperdir);
1350
1277
free(argfile);
1351
1278
1352
1279
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0