To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/release
« back to all changes in this revision
Viewing changes to plugin-runner.c
- browse files at revision 237.11.8
- compare with another revision
- download diff
- download tarball
- view history from revision 237.11.8
- Committer: Teddy Hogeborn
- Date: 2011-10-09 12:32:13 UTC
- mto: (237.15.5 mandos-client-network-hooks)
- mto: This revision was merged to the branch mainline in revision 286.
- Revision ID: teddy@recompile.se-20111009123213-0n60z5awlbxq7ar3
* mandos-ctl: Update copyright year to 2011.
* plugin-runner.c: - '' -
* plugins.d/password-prompt.c: - '' -
* plugin-runner.c: - '' -
* plugins.d/password-prompt.c: - '' -
- files removed:
- debian/mandos-client.examples
- debian/upstream
- network-hooks.d
- files modified:
- .bzrignore
added
removed
plugin-runner.c
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2008-2014 Teddy Hogeborn
6
* Copyright © 2008-2014 Björn Påhlsson
5
* Copyright © 2008-2011 Teddy Hogeborn
6
* Copyright © 2008-2011 Björn Påhlsson
7
7
*
8
8
* This program is free software: you can redistribute it and/or
9
9
* modify it under the terms of the GNU General Public License as
23
23
*/
24
24
25
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
O_CLOEXEC, pipe2() */
26
asprintf(), O_CLOEXEC */
27
27
#include <stddef.h> /* size_t, NULL */
28
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
29
29
realloc() */
30
30
#include <stdbool.h> /* bool, true, false */
31
31
#include <stdio.h> /* fileno(), fprintf(),
32
stderr, STDOUT_FILENO, fclose() */
33
#include <sys/types.h> /* fstat(), struct stat, waitpid(),
34
WIFEXITED(), WEXITSTATUS(), wait(),
35
pid_t, uid_t, gid_t, getuid(),
36
getgid() */
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, fdopendir(), stat(), struct
34
stat, waitpid(), WIFEXITED(),
35
WEXITSTATUS(), wait(), pid_t,
36
uid_t, gid_t, getuid(), getgid(),
37
dirfd() */
37
38
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
38
39
FD_SET(), FD_ISSET(), FD_CLR */
39
40
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
40
41
WEXITSTATUS(), WTERMSIG(),
41
42
WCOREDUMP() */
42
#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
43
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
43
44
#include <iso646.h> /* and, or, not */
44
#include <dirent.h> /* struct dirent, scandirat() */
45
#include <unistd.h> /* fcntl(), F_GETFD, F_SETFD,
46
FD_CLOEXEC, write(), STDOUT_FILENO,
47
struct stat, fstat(), close(),
48
setgid(), setuid(), S_ISREG(),
49
faccessat() pipe2(), fork(),
50
_exit(), dup2(), fexecve(), read()
51
*/
45
#include <dirent.h> /* DIR, struct dirent, fdopendir(),
46
readdir(), closedir(), dirfd() */
47
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
48
fcntl(), setuid(), setgid(),
49
F_GETFD, F_SETFD, FD_CLOEXEC,
50
access(), pipe(), fork(), close()
51
dup2(), STDOUT_FILENO, _exit(),
52
execv(), write(), read(),
53
close() */
52
54
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
53
FD_CLOEXEC, openat(), scandirat(),
54
pipe2() */
55
#include <string.h> /* strsep, strlen(), strsignal(),
56
strcmp(), strncmp() */
55
FD_CLOEXEC */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal(), strcmp(), strncmp() */
57
58
#include <errno.h> /* errno */
58
59
#include <argp.h> /* struct argp_option, struct
59
60
argp_state, struct argp,
71
72
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
72
73
#include <errno.h> /* errno */
73
74
#include <error.h> /* error() */
74
#include <fnmatch.h> /* fnmatch() */
75
75
76
76
#define BUFFER_SIZE 256
77
77
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++){
349
338
char *plugindir = NULL;
350
339
char *argfile = NULL;
351
340
FILE *conffp;
352
struct dirent **direntries = NULL;
341
size_t d_name_len;
342
DIR *dir = NULL;
343
struct dirent *dirst;
353
344
struct stat st;
354
345
fd_set rfds_all;
355
346
int ret, maxfd = 0;
363
354
.sa_flags = SA_NOCLDSTOP };
364
355
char **custom_argv = NULL;
365
356
int custom_argc = 0;
366
int dir_fd = -1;
367
357
368
358
/* Establish a signal handler */
369
359
sigemptyset(&sigchld_action.sa_mask);
426
416
{ .name = NULL }
427
417
};
428
418
429
__attribute__((nonnull(3)))
430
419
error_t parse_opt(int key, char *arg, struct argp_state *state){
431
420
errno = 0;
432
421
switch(key){
433
422
char *tmp;
434
intmax_t tmp_id;
423
intmax_t tmpmax;
435
424
case 'g': /* --global-options */
436
425
{
437
426
char *plugin_option;
440
429
break;
441
430
}
442
431
}
443
errno = 0;
444
432
}
445
433
break;
446
434
case 'G': /* --global-env */
447
if(add_environment(getplugin(NULL), arg, true)){
448
errno = 0;
449
}
435
add_environment(getplugin(NULL), arg, true);
450
436
break;
451
437
case 'o': /* --options-for */
452
438
{
469
455
break;
470
456
}
471
457
}
472
errno = 0;
473
458
}
474
459
break;
475
460
case 'E': /* --env-for */
487
472
errno = EINVAL;
488
473
break;
489
474
}
490
if(add_environment(getplugin(arg), envdef, true)){
491
errno = 0;
492
}
475
add_environment(getplugin(arg), envdef, true);
493
476
}
494
477
break;
495
478
case 'd': /* --disable */
497
480
plugin *p = getplugin(arg);
498
481
if(p != NULL){
499
482
p->disabled = true;
500
errno = 0;
501
483
}
502
484
}
503
485
break;
506
488
plugin *p = getplugin(arg);
507
489
if(p != NULL){
508
490
p->disabled = false;
509
errno = 0;
510
491
}
511
492
}
512
493
break;
513
494
case 128: /* --plugin-dir */
514
495
free(plugindir);
515
496
plugindir = strdup(arg);
516
if(plugindir != NULL){
517
errno = 0;
518
}
519
497
break;
520
498
case 129: /* --config-file */
521
499
/* This is already done by parse_opt_config_file() */
522
500
break;
523
501
case 130: /* --userid */
524
tmp_id = strtoimax(arg, &tmp, 10);
502
tmpmax = strtoimax(arg, &tmp, 10);
525
503
if(errno != 0 or tmp == arg or *tmp != '\0'
526
or tmp_id != (uid_t)tmp_id){
504
or tmpmax != (uid_t)tmpmax){
527
505
argp_error(state, "Bad user ID number: \"%s\", using %"
528
506
PRIdMAX, arg, (intmax_t)uid);
529
507
break;
530
508
}
531
uid = (uid_t)tmp_id;
532
errno = 0;
509
uid = (uid_t)tmpmax;
533
510
break;
534
511
case 131: /* --groupid */
535
tmp_id = strtoimax(arg, &tmp, 10);
512
tmpmax = strtoimax(arg, &tmp, 10);
536
513
if(errno != 0 or tmp == arg or *tmp != '\0'
537
or tmp_id != (gid_t)tmp_id){
514
or tmpmax != (gid_t)tmpmax){
538
515
argp_error(state, "Bad group ID number: \"%s\", using %"
539
516
PRIdMAX, arg, (intmax_t)gid);
540
517
break;
541
518
}
542
gid = (gid_t)tmp_id;
543
errno = 0;
519
gid = (gid_t)tmpmax;
544
520
break;
545
521
case 132: /* --debug */
546
522
debug = true;
594
570
case 129: /* --config-file */
595
571
free(argfile);
596
572
argfile = strdup(arg);
597
if(argfile != NULL){
598
errno = 0;
599
}
600
573
break;
601
574
case 130: /* --userid */
602
575
case 131: /* --groupid */
685
658
}
686
659
687
660
custom_argc += 1;
688
{
689
char **new_argv = realloc(custom_argv, sizeof(char *)
690
* ((unsigned int)
691
custom_argc + 1));
692
if(new_argv == NULL){
693
error(0, errno, "realloc");
694
exitstatus = EX_OSERR;
695
free(new_arg);
696
free(org_line);
697
goto fallback;
698
} else {
699
custom_argv = new_argv;
700
}
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;
701
668
}
702
669
custom_argv[custom_argc-1] = new_arg;
703
670
custom_argv[custom_argc] = NULL;
775
742
}
776
743
}
777
744
778
if(getuid() == 0){
745
{
779
746
/* Work around Debian bug #633582:
780
747
<http://bugs.debian.org/633582> */
781
748
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
782
749
if(plugindir_fd == -1){
783
if(errno != ENOENT){
784
error(0, errno, "open(\"" PDIR "\")");
785
}
750
error(0, errno, "open");
786
751
} else {
787
752
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
788
753
if(ret == -1){
800
765
}
801
766
802
767
/* Lower permissions */
803
ret = setgid(gid);
768
setgid(gid);
804
769
if(ret == -1){
805
770
error(0, errno, "setgid");
806
771
}
811
776
812
777
/* Open plugin directory with close_on_exec flag */
813
778
{
814
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
815
#ifdef O_CLOEXEC
816
O_CLOEXEC
817
#else /* not O_CLOEXEC */
818
0
819
#endif /* not O_CLOEXEC */
820
);
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
}
821
797
if(dir_fd == -1){
822
798
error(0, errno, "Could not open plugin dir");
823
799
exitstatus = EX_UNAVAILABLE;
829
805
ret = set_cloexec_flag(dir_fd);
830
806
if(ret < 0){
831
807
error(0, errno, "set_cloexec_flag");
808
TEMP_FAILURE_RETRY(close(dir_fd));
832
809
exitstatus = EX_OSERR;
833
810
goto fallback;
834
811
}
835
812
#endif /* O_CLOEXEC */
836
}
837
838
int good_name(const struct dirent * const dirent){
839
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
840
"*.dpkg-old", "*.dpkg-bak",
841
"*.dpkg-divert", NULL };
842
#ifdef __GNUC__
843
#pragma GCC diagnostic push
844
#pragma GCC diagnostic ignored "-Wcast-qual"
845
#endif
846
for(const char **pat = (const char **)patterns;
847
*pat != NULL; pat++){
848
#ifdef __GNUC__
849
#pragma GCC diagnostic pop
850
#endif
851
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
852
!= FNM_NOMATCH){
853
if(debug){
854
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
855
" matching pattern %s\n", dirent->d_name, *pat);
856
}
857
return 0;
858
}
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;
859
820
}
860
return 1;
861
}
862
863
#ifdef __GLIBC__
864
#if __GLIBC_PREREQ(2, 15)
865
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
866
alphasort);
867
#else /* not __GLIBC_PREREQ(2, 15) */
868
int numplugins = scandir(plugindir != NULL ? plugindir : PDIR,
869
&direntries, good_name, alphasort);
870
#endif /* not __GLIBC_PREREQ(2, 15) */
871
#else /* not __GLIBC__ */
872
int numplugins = scandir(plugindir != NULL ? plugindir : PDIR,
873
&direntries, good_name, alphasort);
874
#endif /* not __GLIBC__ */
875
if(numplugins == -1){
876
error(0, errno, "Could not scan plugin dir");
877
direntries = NULL;
878
exitstatus = EX_OSERR;
879
goto fallback;
880
821
}
881
822
882
823
FD_ZERO(&rfds_all);
883
824
884
825
/* Read and execute any executable in the plugin directory*/
885
for(int i = 0; i < numplugins; i++){
886
887
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
888
if(plugin_fd == -1){
889
error(0, errno, "Could not open plugin");
890
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");
891
898
continue;
892
899
}
893
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
900
901
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
894
902
if(ret == -1){
895
903
error(0, errno, "stat");
896
TEMP_FAILURE_RETRY(close(plugin_fd));
897
free(direntries[i]);
904
free(filename);
898
905
continue;
899
906
}
900
907
901
908
/* Ignore non-executable files */
902
909
if(not S_ISREG(st.st_mode)
903
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
904
X_OK, 0)) != 0)){
910
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
905
911
if(debug){
906
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
907
" with bad type or mode\n",
908
plugindir != NULL ? plugindir : PDIR,
909
direntries[i]->d_name);
912
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
913
" with bad type or mode\n", filename);
910
914
}
911
TEMP_FAILURE_RETRY(close(plugin_fd));
912
free(direntries[i]);
915
free(filename);
913
916
continue;
914
917
}
915
918
916
plugin *p = getplugin(direntries[i]->d_name);
919
plugin *p = getplugin(dirst->d_name);
917
920
if(p == NULL){
918
921
error(0, errno, "getplugin");
919
TEMP_FAILURE_RETRY(close(plugin_fd));
920
free(direntries[i]);
922
free(filename);
921
923
continue;
922
924
}
923
925
if(p->disabled){
924
926
if(debug){
925
927
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
926
direntries[i]->d_name);
928
dirst->d_name);
927
929
}
928
TEMP_FAILURE_RETRY(close(plugin_fd));
929
free(direntries[i]);
930
free(filename);
930
931
continue;
931
932
}
932
933
{
946
947
}
947
948
}
948
949
}
949
/* If this plugin has any environment variables, we need to
950
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. */
951
953
if(p->environ[0] != NULL){
952
954
for(char **e = environ; *e != NULL; e++){
953
955
if(not add_environment(p, *e, false)){
957
959
}
958
960
959
961
int pipefd[2];
960
#ifndef O_CLOEXEC
961
962
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
962
#else /* O_CLOEXEC */
963
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
964
#endif /* O_CLOEXEC */
965
963
if(ret == -1){
966
964
error(0, errno, "pipe");
967
965
exitstatus = EX_OSERR;
968
free(direntries[i]);
969
goto fallback;
970
}
971
if(pipefd[0] >= FD_SETSIZE){
972
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
973
FD_SETSIZE);
974
TEMP_FAILURE_RETRY(close(pipefd[0]));
975
TEMP_FAILURE_RETRY(close(pipefd[1]));
976
exitstatus = EX_OSERR;
977
free(direntries[i]);
978
goto fallback;
979
}
980
#ifndef O_CLOEXEC
966
goto fallback;
967
}
981
968
/* Ask OS to automatic close the pipe on exec */
982
969
ret = set_cloexec_flag(pipefd[0]);
983
970
if(ret < 0){
984
971
error(0, errno, "set_cloexec_flag");
985
TEMP_FAILURE_RETRY(close(pipefd[0]));
986
TEMP_FAILURE_RETRY(close(pipefd[1]));
987
972
exitstatus = EX_OSERR;
988
free(direntries[i]);
989
973
goto fallback;
990
974
}
991
975
ret = set_cloexec_flag(pipefd[1]);
992
976
if(ret < 0){
993
977
error(0, errno, "set_cloexec_flag");
994
TEMP_FAILURE_RETRY(close(pipefd[0]));
995
TEMP_FAILURE_RETRY(close(pipefd[1]));
996
978
exitstatus = EX_OSERR;
997
free(direntries[i]);
998
979
goto fallback;
999
980
}
1000
#endif /* not O_CLOEXEC */
1001
981
/* Block SIGCHLD until process is safely in process list */
1002
982
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1003
983
&sigchld_action.sa_mask,
1005
985
if(ret < 0){
1006
986
error(0, errno, "sigprocmask");
1007
987
exitstatus = EX_OSERR;
1008
free(direntries[i]);
1009
988
goto fallback;
1010
989
}
1011
990
/* Starting a new process to be watched */
1015
994
} while(pid == -1 and errno == EINTR);
1016
995
if(pid == -1){
1017
996
error(0, errno, "fork");
1018
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1019
&sigchld_action.sa_mask, NULL));
1020
TEMP_FAILURE_RETRY(close(pipefd[0]));
1021
TEMP_FAILURE_RETRY(close(pipefd[1]));
1022
997
exitstatus = EX_OSERR;
1023
free(direntries[i]);
1024
998
goto fallback;
1025
999
}
1026
1000
if(pid == 0){
1042
1016
_exit(EX_OSERR);
1043
1017
}
1044
1018
1045
if(fexecve(plugin_fd, p->argv,
1046
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1047
error(0, errno, "fexecve for %s/%s",
1048
plugindir != NULL ? plugindir : PDIR,
1049
direntries[i]->d_name);
1050
_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
}
1051
1034
}
1052
1035
/* no return */
1053
1036
}
1054
1037
/* Parent process */
1055
1038
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1056
1039
pipe */
1057
TEMP_FAILURE_RETRY(close(plugin_fd));
1058
plugin *new_plugin = getplugin(direntries[i]->d_name);
1040
free(filename);
1041
plugin *new_plugin = getplugin(dirst->d_name);
1059
1042
if(new_plugin == NULL){
1060
1043
error(0, errno, "getplugin");
1061
1044
ret = (int)(TEMP_FAILURE_RETRY
1065
1048
error(0, errno, "sigprocmask");
1066
1049
}
1067
1050
exitstatus = EX_OSERR;
1068
free(direntries[i]);
1069
1051
goto fallback;
1070
1052
}
1071
free(direntries[i]);
1072
1053
1073
1054
new_plugin->pid = pid;
1074
1055
new_plugin->fd = pipefd[0];
1084
1065
goto fallback;
1085
1066
}
1086
1067
1087
#if defined (__GNUC__) and defined (__GLIBC__)
1088
#if not __GLIBC_PREREQ(2, 16)
1089
#pragma GCC diagnostic push
1090
#pragma GCC diagnostic ignored "-Wsign-conversion"
1091
#endif
1092
#endif
1093
1068
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1094
-Wconversion in GNU libc
1095
before 2.16 */
1096
#if defined (__GNUC__) and defined (__GLIBC__)
1097
#if not __GLIBC_PREREQ(2, 16)
1098
#pragma GCC diagnostic pop
1099
#endif
1100
#endif
1069
-Wconversion */
1101
1070
1102
1071
if(maxfd < new_plugin->fd){
1103
1072
maxfd = new_plugin->fd;
1104
1073
}
1105
1074
}
1106
1075
1107
free(direntries);
1108
direntries = NULL;
1109
TEMP_FAILURE_RETRY(close(dir_fd));
1110
dir_fd = -1;
1076
TEMP_FAILURE_RETRY(closedir(dir));
1077
dir = NULL;
1111
1078
free_plugin(getplugin(NULL));
1112
1079
1113
1080
for(plugin *p = plugin_list; p != NULL; p = p->next){
1159
1126
}
1160
1127
1161
1128
/* Remove the plugin */
1162
#if defined (__GNUC__) and defined (__GLIBC__)
1163
#if not __GLIBC_PREREQ(2, 16)
1164
#pragma GCC diagnostic push
1165
#pragma GCC diagnostic ignored "-Wsign-conversion"
1166
#endif
1167
#endif
1168
1129
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1169
-Wconversion in GNU libc
1170
before 2.16 */
1171
#if defined (__GNUC__) and defined (__GLIBC__)
1172
#if not __GLIBC_PREREQ(2, 16)
1173
#pragma GCC diagnostic pop
1174
#endif
1175
#endif
1130
-Wconversion */
1176
1131
1177
1132
/* Block signal while modifying process_list */
1178
1133
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1218
1173
}
1219
1174
1220
1175
/* This process has not completed. Does it have any output? */
1221
#if defined (__GNUC__) and defined (__GLIBC__)
1222
#if not __GLIBC_PREREQ(2, 16)
1223
#pragma GCC diagnostic push
1224
#pragma GCC diagnostic ignored "-Wsign-conversion"
1225
#endif
1226
#endif
1227
1176
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1228
1177
warning from
1229
-Wconversion
1230
in GNU libc
1231
before
1232
2.16 */
1233
#if defined (__GNUC__) and defined (__GLIBC__)
1234
#if not __GLIBC_PREREQ(2, 16)
1235
#pragma GCC diagnostic pop
1236
#endif
1237
#endif
1178
-Wconversion */
1238
1179
/* This process had nothing to say at this time */
1239
1180
proc = proc->next;
1240
1181
continue;
1241
1182
}
1242
1183
/* Before reading, make the process' data buffer large enough */
1243
1184
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1244
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1245
+ (size_t) BUFFER_SIZE);
1246
if(new_buffer == NULL){
1185
proc->buffer = realloc(proc->buffer, proc->buffer_size
1186
+ (size_t) BUFFER_SIZE);
1187
if(proc->buffer == NULL){
1247
1188
error(0, errno, "malloc");
1248
1189
exitstatus = EX_OSERR;
1249
1190
goto fallback;
1250
1191
}
1251
proc->buffer = new_buffer;
1252
1192
proc->buffer_size += BUFFER_SIZE;
1253
1193
}
1254
1194
/* Read from the process */
1307
1247
free(custom_argv);
1308
1248
}
1309
1249
1310
free(direntries);
1311
1312
if(dir_fd != -1){
1313
TEMP_FAILURE_RETRY(close(dir_fd));
1250
if(dir != NULL){
1251
closedir(dir);
1314
1252
}
1315
1253
1316
1254
/* Kill the processes */
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0