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- Committer: Björn Påhlsson
- Date: 2011-09-26 18:47:38 UTC
- mto: (237.7.50 mandos)
- mto: This revision was merged to the branch mainline in revision 286.
- Revision ID: belorn@fukt.bsnet.se-20110926184738-ee8kz5vc9pb3393m
updated TODO
- files removed:
- bugs.xml
- debian/upstream
- 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 © 2008-2016 Teddy Hogeborn
6
* Copyright © 2008-2016 Björn Påhlsson
5
* Copyright © 2008-2010 Teddy Hogeborn
6
* Copyright © 2008-2010 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
19
19
* along with this program. If not, see
20
20
* <http://www.gnu.org/licenses/>.
21
21
*
22
* Contact the authors at <mandos@recompile.se>.
22
* Contact the authors at <mandos@fukt.bsnet.se>.
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
WEXITSTATUS(), WTERMSIG() */
41
#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
41
WEXITSTATUS(), WTERMSIG(),
42
WCOREDUMP() */
43
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
42
44
#include <iso646.h> /* and, or, not */
43
#include <dirent.h> /* struct dirent, scandirat() */
44
#include <unistd.h> /* fcntl(), F_GETFD, F_SETFD,
45
FD_CLOEXEC, write(), STDOUT_FILENO,
46
struct stat, fstat(), close(),
47
setgid(), setuid(), S_ISREG(),
48
faccessat() pipe2(), fork(),
49
_exit(), dup2(), fexecve(), read()
50
*/
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() */
51
54
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
52
FD_CLOEXEC, openat(), scandirat(),
53
pipe2() */
54
#include <string.h> /* strsep, strlen(), strsignal(),
55
strcmp(), strncmp() */
55
FD_CLOEXEC */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal(), strcmp(), strncmp() */
56
58
#include <errno.h> /* errno */
57
59
#include <argp.h> /* struct argp_option, struct
58
60
argp_state, struct argp,
70
72
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
71
73
#include <errno.h> /* errno */
72
74
#include <error.h> /* error() */
73
#include <fnmatch.h> /* fnmatch() */
74
75
75
76
#define BUFFER_SIZE 256
76
77
77
78
#define PDIR "/lib/mandos/plugins.d"
78
#define PHDIR "/lib/mandos/plugin-helpers"
79
79
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
80
80
81
81
const char *argp_program_version = "plugin-runner " VERSION;
82
const char *argp_program_bug_address = "<mandos@recompile.se>";
82
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
83
83
84
84
typedef struct plugin{
85
85
char *name; /* can be NULL or any plugin name */
105
105
106
106
/* Gets an existing plugin based on name,
107
107
or if none is found, creates a new one */
108
__attribute__((warn_unused_result))
109
108
static plugin *getplugin(char *name){
110
109
/* Check for existing plugin with that name */
111
110
for(plugin *p = plugin_list; p != NULL; p = p->next){
172
171
}
173
172
174
173
/* Helper function for add_argument and add_environment */
175
__attribute__((nonnull, warn_unused_result))
176
174
static bool add_to_char_array(const char *new, char ***array,
177
175
int *len){
178
176
/* Resize the pointed-to array to hold one more pointer */
179
char **new_array = NULL;
180
177
do {
181
new_array = realloc(*array, sizeof(char *)
182
* (size_t) ((*len) + 2));
183
} 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);
184
181
/* Malloc check */
185
if(new_array == NULL){
182
if(*array == NULL){
186
183
return false;
187
184
}
188
*array = new_array;
189
185
/* Make a copy of the new string */
190
186
char *copy;
191
187
do {
203
199
}
204
200
205
201
/* Add to a plugin's argument vector */
206
__attribute__((nonnull(2), warn_unused_result))
207
202
static bool add_argument(plugin *p, const char *arg){
208
203
if(p == NULL){
209
204
return false;
212
207
}
213
208
214
209
/* Add to a plugin's environment */
215
__attribute__((nonnull(2), warn_unused_result))
216
210
static bool add_environment(plugin *p, const char *def, bool replace){
217
211
if(p == NULL){
218
212
return false;
220
214
/* namelen = length of name of environment variable */
221
215
size_t namelen = (size_t)(strchrnul(def, '=') - def);
222
216
/* Search for this environment variable */
223
for(char **envdef = p->environ; *envdef != NULL; envdef++){
224
if(strncmp(*envdef, def, namelen + 1) == 0){
217
for(char **e = p->environ; *e != NULL; e++){
218
if(strncmp(*e, def, namelen + 1) == 0){
225
219
/* It already exists */
226
220
if(replace){
227
char *new_envdef;
221
char *new;
228
222
do {
229
new_envdef = realloc(*envdef, strlen(def) + 1);
230
} while(new_envdef == NULL and errno == EINTR);
231
if(new_envdef == NULL){
223
new = realloc(*e, strlen(def) + 1);
224
} while(new == NULL and errno == EINTR);
225
if(new == NULL){
232
226
return false;
233
227
}
234
*envdef = new_envdef;
235
strcpy(*envdef, def);
228
*e = new;
229
strcpy(*e, def);
236
230
}
237
231
return true;
238
232
}
240
234
return add_to_char_array(def, &(p->environ), &(p->envc));
241
235
}
242
236
243
#ifndef O_CLOEXEC
244
237
/*
245
238
* Based on the example in the GNU LibC manual chapter 13.13 "File
246
239
* Descriptor Flags".
247
240
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
248
241
*/
249
__attribute__((warn_unused_result))
250
242
static int set_cloexec_flag(int fd){
251
243
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
252
244
/* If reading the flags failed, return error indication now. */
257
249
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
258
250
ret | FD_CLOEXEC));
259
251
}
260
#endif /* not O_CLOEXEC */
261
252
262
253
263
254
/* Mark processes as completed when they exit, and save their exit
295
286
}
296
287
297
288
/* Prints out a password to stdout */
298
__attribute__((nonnull, warn_unused_result))
299
289
static bool print_out_password(const char *buffer, size_t length){
300
290
ssize_t ret;
301
291
for(size_t written = 0; written < length; written += (size_t)ret){
309
299
}
310
300
311
301
/* Removes and free a plugin from the plugin list */
312
__attribute__((nonnull))
313
302
static void free_plugin(plugin *plugin_node){
314
303
315
304
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
347
336
348
337
int main(int argc, char *argv[]){
349
338
char *plugindir = NULL;
350
char *pluginhelperdir = NULL;
351
339
char *argfile = NULL;
352
340
FILE *conffp;
353
struct dirent **direntries = NULL;
341
size_t d_name_len;
342
DIR *dir = NULL;
343
struct dirent *dirst;
354
344
struct stat st;
355
345
fd_set rfds_all;
356
346
int ret, maxfd = 0;
364
354
.sa_flags = SA_NOCLDSTOP };
365
355
char **custom_argv = NULL;
366
356
int custom_argc = 0;
367
int dir_fd = -1;
368
357
369
358
/* Establish a signal handler */
370
359
sigemptyset(&sigchld_action.sa_mask);
415
404
.doc = "Group ID the plugins will run as", .group = 3 },
416
405
{ .name = "debug", .key = 132,
417
406
.doc = "Debug mode", .group = 4 },
418
{ .name = "plugin-helper-dir", .key = 133,
419
.arg = "DIRECTORY",
420
.doc = "Specify a different plugin helper directory",
421
.group = 2 },
422
407
/*
423
408
* These reproduce what we would get without ARGP_NO_HELP
424
409
*/
431
416
{ .name = NULL }
432
417
};
433
418
434
__attribute__((nonnull(3)))
435
419
error_t parse_opt(int key, char *arg, struct argp_state *state){
436
420
errno = 0;
437
421
switch(key){
438
422
char *tmp;
439
intmax_t tmp_id;
423
intmax_t tmpmax;
440
424
case 'g': /* --global-options */
441
425
{
442
426
char *plugin_option;
445
429
break;
446
430
}
447
431
}
448
errno = 0;
449
432
}
450
433
break;
451
434
case 'G': /* --global-env */
452
if(add_environment(getplugin(NULL), arg, true)){
453
errno = 0;
454
}
435
add_environment(getplugin(NULL), arg, true);
455
436
break;
456
437
case 'o': /* --options-for */
457
438
{
474
455
break;
475
456
}
476
457
}
477
errno = 0;
478
458
}
479
459
break;
480
460
case 'E': /* --env-for */
492
472
errno = EINVAL;
493
473
break;
494
474
}
495
if(add_environment(getplugin(arg), envdef, true)){
496
errno = 0;
497
}
475
add_environment(getplugin(arg), envdef, true);
498
476
}
499
477
break;
500
478
case 'd': /* --disable */
502
480
plugin *p = getplugin(arg);
503
481
if(p != NULL){
504
482
p->disabled = true;
505
errno = 0;
506
483
}
507
484
}
508
485
break;
511
488
plugin *p = getplugin(arg);
512
489
if(p != NULL){
513
490
p->disabled = false;
514
errno = 0;
515
491
}
516
492
}
517
493
break;
518
494
case 128: /* --plugin-dir */
519
495
free(plugindir);
520
496
plugindir = strdup(arg);
521
if(plugindir != NULL){
522
errno = 0;
523
}
524
497
break;
525
498
case 129: /* --config-file */
526
499
/* This is already done by parse_opt_config_file() */
527
500
break;
528
501
case 130: /* --userid */
529
tmp_id = strtoimax(arg, &tmp, 10);
502
tmpmax = strtoimax(arg, &tmp, 10);
530
503
if(errno != 0 or tmp == arg or *tmp != '\0'
531
or tmp_id != (uid_t)tmp_id){
504
or tmpmax != (uid_t)tmpmax){
532
505
argp_error(state, "Bad user ID number: \"%s\", using %"
533
506
PRIdMAX, arg, (intmax_t)uid);
534
507
break;
535
508
}
536
uid = (uid_t)tmp_id;
537
errno = 0;
509
uid = (uid_t)tmpmax;
538
510
break;
539
511
case 131: /* --groupid */
540
tmp_id = strtoimax(arg, &tmp, 10);
512
tmpmax = strtoimax(arg, &tmp, 10);
541
513
if(errno != 0 or tmp == arg or *tmp != '\0'
542
or tmp_id != (gid_t)tmp_id){
514
or tmpmax != (gid_t)tmpmax){
543
515
argp_error(state, "Bad group ID number: \"%s\", using %"
544
516
PRIdMAX, arg, (intmax_t)gid);
545
517
break;
546
518
}
547
gid = (gid_t)tmp_id;
548
errno = 0;
519
gid = (gid_t)tmpmax;
549
520
break;
550
521
case 132: /* --debug */
551
522
debug = true;
552
523
break;
553
case 133: /* --plugin-helper-dir */
554
free(pluginhelperdir);
555
pluginhelperdir = strdup(arg);
556
if(pluginhelperdir != NULL){
557
errno = 0;
558
}
559
break;
560
524
/*
561
525
* These reproduce what we would get without ARGP_NO_HELP
562
526
*/
606
570
case 129: /* --config-file */
607
571
free(argfile);
608
572
argfile = strdup(arg);
609
if(argfile != NULL){
610
errno = 0;
611
}
612
573
break;
613
574
case 130: /* --userid */
614
575
case 131: /* --groupid */
615
576
case 132: /* --debug */
616
case 133: /* --plugin-helper-dir */
617
577
case '?': /* --help */
618
578
case -3: /* --usage */
619
579
case 'V': /* --version */
698
658
}
699
659
700
660
custom_argc += 1;
701
{
702
char **new_argv = realloc(custom_argv, sizeof(char *)
703
* ((size_t)custom_argc + 1));
704
if(new_argv == NULL){
705
error(0, errno, "realloc");
706
exitstatus = EX_OSERR;
707
free(new_arg);
708
free(org_line);
709
goto fallback;
710
} else {
711
custom_argv = new_argv;
712
}
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;
713
668
}
714
669
custom_argv[custom_argc-1] = new_arg;
715
670
custom_argv[custom_argc] = NULL;
773
728
goto fallback;
774
729
}
775
730
776
{
777
char *pluginhelperenv;
778
bool bret = true;
779
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
780
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
781
if(ret != -1){
782
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
783
}
784
if(ret == -1 or not bret){
785
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
786
" environment variable to \"%s\" for all plugins\n",
787
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
788
}
789
if(ret != -1){
790
free(pluginhelperenv);
791
}
792
}
793
794
731
if(debug){
795
732
for(plugin *p = plugin_list; p != NULL; p=p->next){
796
733
fprintf(stderr, "Plugin: %s has %d arguments\n",
805
742
}
806
743
}
807
744
808
if(getuid() == 0){
745
{
809
746
/* Work around Debian bug #633582:
810
<https://bugs.debian.org/633582> */
747
<http://bugs.debian.org/633582> */
811
748
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
812
749
if(plugindir_fd == -1){
813
if(errno != ENOENT){
814
error(0, errno, "open(\"" PDIR "\")");
815
}
750
error(0, errno, "open");
816
751
} else {
817
752
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
818
753
if(ret == -1){
825
760
}
826
761
}
827
762
}
828
close(plugindir_fd);
763
TEMP_FAILURE_RETRY(close(plugindir_fd));
829
764
}
830
765
}
831
766
832
767
/* Lower permissions */
833
ret = setgid(gid);
768
setgid(gid);
834
769
if(ret == -1){
835
770
error(0, errno, "setgid");
836
771
}
841
776
842
777
/* Open plugin directory with close_on_exec flag */
843
778
{
844
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
845
#ifdef O_CLOEXEC
846
O_CLOEXEC
847
#else /* not O_CLOEXEC */
848
0
849
#endif /* not O_CLOEXEC */
850
);
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
}
851
797
if(dir_fd == -1){
852
798
error(0, errno, "Could not open plugin dir");
853
799
exitstatus = EX_UNAVAILABLE;
859
805
ret = set_cloexec_flag(dir_fd);
860
806
if(ret < 0){
861
807
error(0, errno, "set_cloexec_flag");
808
TEMP_FAILURE_RETRY(close(dir_fd));
862
809
exitstatus = EX_OSERR;
863
810
goto fallback;
864
811
}
865
812
#endif /* O_CLOEXEC */
866
}
867
868
int good_name(const struct dirent * const dirent){
869
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
870
"*.dpkg-old", "*.dpkg-bak",
871
"*.dpkg-divert", NULL };
872
#ifdef __GNUC__
873
#pragma GCC diagnostic push
874
#pragma GCC diagnostic ignored "-Wcast-qual"
875
#endif
876
for(const char **pat = (const char **)patterns;
877
*pat != NULL; pat++){
878
#ifdef __GNUC__
879
#pragma GCC diagnostic pop
880
#endif
881
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
882
!= FNM_NOMATCH){
883
if(debug){
884
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
885
" matching pattern %s\n", dirent->d_name, *pat);
886
}
887
return 0;
888
}
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;
889
820
}
890
return 1;
891
}
892
893
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
894
alphasort);
895
if(numplugins == -1){
896
error(0, errno, "Could not scan plugin dir");
897
direntries = NULL;
898
exitstatus = EX_OSERR;
899
goto fallback;
900
821
}
901
822
902
823
FD_ZERO(&rfds_all);
903
824
904
825
/* Read and execute any executable in the plugin directory*/
905
for(int i = 0; i < numplugins; i++){
906
907
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
908
if(plugin_fd == -1){
909
error(0, errno, "Could not open plugin");
910
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");
911
898
continue;
912
899
}
913
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
900
901
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
914
902
if(ret == -1){
915
903
error(0, errno, "stat");
916
close(plugin_fd);
917
free(direntries[i]);
904
free(filename);
918
905
continue;
919
906
}
920
907
921
908
/* Ignore non-executable files */
922
909
if(not S_ISREG(st.st_mode)
923
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
924
X_OK, 0)) != 0)){
910
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
925
911
if(debug){
926
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
927
" with bad type or mode\n",
928
plugindir != NULL ? plugindir : PDIR,
929
direntries[i]->d_name);
912
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
913
" with bad type or mode\n", filename);
930
914
}
931
close(plugin_fd);
932
free(direntries[i]);
915
free(filename);
933
916
continue;
934
917
}
935
918
936
plugin *p = getplugin(direntries[i]->d_name);
919
plugin *p = getplugin(dirst->d_name);
937
920
if(p == NULL){
938
921
error(0, errno, "getplugin");
939
close(plugin_fd);
940
free(direntries[i]);
922
free(filename);
941
923
continue;
942
924
}
943
925
if(p->disabled){
944
926
if(debug){
945
927
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
946
direntries[i]->d_name);
928
dirst->d_name);
947
929
}
948
close(plugin_fd);
949
free(direntries[i]);
930
free(filename);
950
931
continue;
951
932
}
952
933
{
966
947
}
967
948
}
968
949
}
969
/* If this plugin has any environment variables, we need to
970
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. */
971
953
if(p->environ[0] != NULL){
972
954
for(char **e = environ; *e != NULL; e++){
973
955
if(not add_environment(p, *e, false)){
977
959
}
978
960
979
961
int pipefd[2];
980
#ifndef O_CLOEXEC
981
962
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
982
#else /* O_CLOEXEC */
983
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
984
#endif /* O_CLOEXEC */
985
963
if(ret == -1){
986
964
error(0, errno, "pipe");
987
965
exitstatus = EX_OSERR;
988
free(direntries[i]);
989
goto fallback;
990
}
991
if(pipefd[0] >= FD_SETSIZE){
992
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
993
FD_SETSIZE);
994
close(pipefd[0]);
995
close(pipefd[1]);
996
exitstatus = EX_OSERR;
997
free(direntries[i]);
998
goto fallback;
999
}
1000
#ifndef O_CLOEXEC
966
goto fallback;
967
}
1001
968
/* Ask OS to automatic close the pipe on exec */
1002
969
ret = set_cloexec_flag(pipefd[0]);
1003
970
if(ret < 0){
1004
971
error(0, errno, "set_cloexec_flag");
1005
close(pipefd[0]);
1006
close(pipefd[1]);
1007
972
exitstatus = EX_OSERR;
1008
free(direntries[i]);
1009
973
goto fallback;
1010
974
}
1011
975
ret = set_cloexec_flag(pipefd[1]);
1012
976
if(ret < 0){
1013
977
error(0, errno, "set_cloexec_flag");
1014
close(pipefd[0]);
1015
close(pipefd[1]);
1016
978
exitstatus = EX_OSERR;
1017
free(direntries[i]);
1018
979
goto fallback;
1019
980
}
1020
#endif /* not O_CLOEXEC */
1021
981
/* Block SIGCHLD until process is safely in process list */
1022
982
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1023
983
&sigchld_action.sa_mask,
1025
985
if(ret < 0){
1026
986
error(0, errno, "sigprocmask");
1027
987
exitstatus = EX_OSERR;
1028
free(direntries[i]);
1029
988
goto fallback;
1030
989
}
1031
990
/* Starting a new process to be watched */
1035
994
} while(pid == -1 and errno == EINTR);
1036
995
if(pid == -1){
1037
996
error(0, errno, "fork");
1038
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1039
&sigchld_action.sa_mask, NULL));
1040
close(pipefd[0]);
1041
close(pipefd[1]);
1042
997
exitstatus = EX_OSERR;
1043
free(direntries[i]);
1044
998
goto fallback;
1045
999
}
1046
1000
if(pid == 0){
1062
1016
_exit(EX_OSERR);
1063
1017
}
1064
1018
1065
if(fexecve(plugin_fd, p->argv,
1066
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1067
error(0, errno, "fexecve for %s/%s",
1068
plugindir != NULL ? plugindir : PDIR,
1069
direntries[i]->d_name);
1070
_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
}
1071
1034
}
1072
1035
/* no return */
1073
1036
}
1074
1037
/* Parent process */
1075
close(pipefd[1]); /* Close unused write end of pipe */
1076
close(plugin_fd);
1077
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);
1078
1042
if(new_plugin == NULL){
1079
1043
error(0, errno, "getplugin");
1080
1044
ret = (int)(TEMP_FAILURE_RETRY
1084
1048
error(0, errno, "sigprocmask");
1085
1049
}
1086
1050
exitstatus = EX_OSERR;
1087
free(direntries[i]);
1088
1051
goto fallback;
1089
1052
}
1090
free(direntries[i]);
1091
1053
1092
1054
new_plugin->pid = pid;
1093
1055
new_plugin->fd = pipefd[0];
1103
1065
goto fallback;
1104
1066
}
1105
1067
1106
FD_SET(new_plugin->fd, &rfds_all);
1068
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1069
-Wconversion */
1107
1070
1108
1071
if(maxfd < new_plugin->fd){
1109
1072
maxfd = new_plugin->fd;
1110
1073
}
1111
1074
}
1112
1075
1113
free(direntries);
1114
direntries = NULL;
1115
close(dir_fd);
1116
dir_fd = -1;
1076
TEMP_FAILURE_RETRY(closedir(dir));
1077
dir = NULL;
1117
1078
free_plugin(getplugin(NULL));
1118
1079
1119
1080
for(plugin *p = plugin_list; p != NULL; p = p->next){
1158
1119
(intmax_t) (proc->pid),
1159
1120
WTERMSIG(proc->status),
1160
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));
1161
1125
}
1162
1126
}
1163
1127
1164
1128
/* Remove the plugin */
1165
FD_CLR(proc->fd, &rfds_all);
1129
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1130
-Wconversion */
1166
1131
1167
1132
/* Block signal while modifying process_list */
1168
1133
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1208
1173
}
1209
1174
1210
1175
/* This process has not completed. Does it have any output? */
1211
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 */
1212
1179
/* This process had nothing to say at this time */
1213
1180
proc = proc->next;
1214
1181
continue;
1215
1182
}
1216
1183
/* Before reading, make the process' data buffer large enough */
1217
1184
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1218
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1219
+ (size_t) BUFFER_SIZE);
1220
if(new_buffer == NULL){
1185
proc->buffer = realloc(proc->buffer, proc->buffer_size
1186
+ (size_t) BUFFER_SIZE);
1187
if(proc->buffer == NULL){
1221
1188
error(0, errno, "malloc");
1222
1189
exitstatus = EX_OSERR;
1223
1190
goto fallback;
1224
1191
}
1225
proc->buffer = new_buffer;
1226
1192
proc->buffer_size += BUFFER_SIZE;
1227
1193
}
1228
1194
/* Read from the process */
1281
1247
free(custom_argv);
1282
1248
}
1283
1249
1284
free(direntries);
1285
1286
if(dir_fd != -1){
1287
close(dir_fd);
1250
if(dir != NULL){
1251
closedir(dir);
1288
1252
}
1289
1253
1290
1254
/* Kill the processes */
1310
1274
free_plugin_list();
1311
1275
1312
1276
free(plugindir);
1313
free(pluginhelperdir);
1314
1277
free(argfile);
1315
1278
1316
1279
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0