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- Committer: Teddy Hogeborn
- Date: 2021-02-03 08:57:27 UTC
- mto: This revision was merged to the branch mainline in revision 1236.
- Revision ID: teddy@recompile.se-20210203085727-r2nseei71wb0clpf
Tags: version-1.8.14-1
Version 1.8.14-1
* Makefile (version): Change to "1.8.14".
* NEWS (Version 1.8.14): Add new entry.
* debian/changelog (1.8.14-1): - '' -
* Makefile (version): Change to "1.8.14".
* NEWS (Version 1.8.14): Add new entry.
* debian/changelog (1.8.14-1): - '' -
- files added:
- bugs.xml
- debian/tests
- dracut-module
- 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 © 2008-2014 Teddy Hogeborn
6
* Copyright © 2008-2014 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 © 2008-2021 Teddy Hogeborn
6
* Copyright © 2008-2021 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
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
O_CLOEXEC, pipe2() */
26
#define _GNU_SOURCE /* strchrnul(), TEMP_FAILURE_RETRY(),
27
getline(), asprintf(), O_CLOEXEC,
28
scandirat(), pipe2() */
29
#include <argp.h> /* argp_program_version,
30
argp_program_bug_address,
31
struct argp_option,
32
struct argp_state, argp_error(),
33
ARGP_NO_EXIT, argp_state_help,
34
ARGP_HELP_STD_HELP,
35
ARGP_HELP_USAGE, ARGP_HELP_EXIT_OK,
36
ARGP_KEY_ARG, ARGP_ERR_UNKNOWN,
37
struct argp, argp_parse(),
38
ARGP_IN_ORDER, ARGP_NO_HELP */
39
#include <stdbool.h> /* bool, false, true */
40
#include <sys/types.h> /* pid_t, sig_atomic_t, uid_t, gid_t,
41
getuid(), setgid(), setuid() */
27
42
#include <stddef.h> /* size_t, NULL */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
29
realloc() */
30
#include <stdbool.h> /* bool, true, false */
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() */
37
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
38
FD_SET(), FD_ISSET(), FD_CLR */
39
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
40
WEXITSTATUS(), WTERMSIG(),
41
WCOREDUMP() */
42
#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
43
#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
*/
43
#include <iso646.h> /* or, and, not */
44
#include <string.h> /* strcmp(), strdup(), strchrnul(),
45
strncmp(), strlen(), strcpy(),
46
strsep(), strchr(), strsignal() */
47
#include <stdlib.h> /* malloc(), free(), reallocarray(),
48
realloc(), EXIT_SUCCESS */
49
#include <errno.h> /* errno, EINTR, ENOMEM, ECHILD,
50
error_t, EINVAL, EMFILE, ENFILE,
51
ENOENT, ESRCH */
52
#include <stdint.h> /* SIZE_MAX */
53
#define _GNU_SOURCE /* strchrnul(), TEMP_FAILURE_RETRY(),
54
getline(), asprintf(), O_CLOEXEC,
55
scandirat(), pipe2() */
56
#include <unistd.h> /* TEMP_FAILURE_RETRY(), ssize_t,
57
write(), STDOUT_FILENO, uid_t,
58
gid_t, getuid(), fchown(), close(),
59
symlink(), setgid(), setuid(),
60
faccessat(), X_OK, pipe(), pipe2(),
61
fork(), _exit(), dup2(), fexecve(),
62
read(), getpass() */
52
63
#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() */
57
#include <errno.h> /* errno */
58
#include <argp.h> /* struct argp_option, struct
59
argp_state, struct argp,
60
argp_parse(), ARGP_ERR_UNKNOWN,
61
ARGP_KEY_END, ARGP_KEY_ARG,
62
error_t */
63
#include <signal.h> /* struct sigaction, sigemptyset(),
64
sigaddset(), sigaction(),
65
sigprocmask(), SIG_BLOCK, SIGCHLD,
66
SIG_UNBLOCK, kill(), sig_atomic_t
67
*/
68
#include <errno.h> /* errno, EBADF */
69
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
64
FD_CLOEXEC, open(), O_RDONLY,
65
O_CLOEXEC, openat() */
66
#include <sys/wait.h> /* waitpid(), WNOHANG, WIFEXITED(),
67
WEXITSTATUS(), WIFSIGNALED(),
68
WTERMSIG(), wait() */
69
#include <error.h> /* error() */
70
#include <stdio.h> /* FILE, fprintf(), fopen(),
71
getline(), fclose(), EOF,
72
asprintf(), stderr */
73
#include <dirent.h> /* struct dirent, scandirat(),
74
alphasort() */
75
#include <sys/stat.h> /* struct stat, fstat(), S_ISDIR(),
76
lstat(), S_ISREG() */
77
#include <sys/select.h> /* fd_set, FD_ZERO(), FD_SETSIZE,
78
FD_SET(), select(), FD_CLR(),
79
FD_ISSET() */
80
#include <signal.h> /* struct sigaction, SA_NOCLDSTOP,
81
sigemptyset(), sigaddset(),
82
SIGCHLD, sigprocmask(), SIG_BLOCK,
83
SIG_UNBLOCK, kill(), SIGTERM */
70
84
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,
71
85
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
72
#include <errno.h> /* errno */
73
#include <error.h> /* error() */
74
#include <fnmatch.h> /* fnmatch() */
86
#include <inttypes.h> /* intmax_t, strtoimax(), PRIdMAX */
87
#include <fnmatch.h> /* fnmatch(), FNM_FILE_NAME,
88
FNM_PERIOD, FNM_NOMATCH */
75
89
76
90
#define BUFFER_SIZE 256
77
91
78
92
#define PDIR "/lib/mandos/plugins.d"
93
#define PHDIR "/lib/mandos/plugin-helpers"
79
94
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
80
95
81
96
const char *argp_program_version = "plugin-runner " VERSION;
178
193
/* Resize the pointed-to array to hold one more pointer */
179
194
char **new_array = NULL;
180
195
do {
181
new_array = realloc(*array, sizeof(char *)
182
* (size_t) ((*len) + 2));
196
#if defined(__GLIBC_PREREQ) and __GLIBC_PREREQ(2, 26)
197
new_array = reallocarray(*array, (size_t)((*len) + 2),
198
sizeof(char *));
199
#else
200
if(((size_t)((*len) + 2)) > (SIZE_MAX / sizeof(char *))){
201
/* overflow */
202
new_array = NULL;
203
errno = ENOMEM;
204
} else {
205
new_array = realloc(*array, (size_t)((*len) + 2)
206
* sizeof(char *));
207
}
208
#endif
183
209
} while(new_array == NULL and errno == EINTR);
184
210
/* Malloc check */
185
211
if(new_array == NULL){
312
338
__attribute__((nonnull))
313
339
static void free_plugin(plugin *plugin_node){
314
340
315
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
341
for(char **arg = (plugin_node->argv)+1; *arg != NULL; arg++){
316
342
free(*arg);
317
343
}
344
free(plugin_node->name);
318
345
free(plugin_node->argv);
319
346
for(char **env = plugin_node->environ; *env != NULL; env++){
320
347
free(*env);
347
374
348
375
int main(int argc, char *argv[]){
349
376
char *plugindir = NULL;
377
char *pluginhelperdir = NULL;
350
378
char *argfile = NULL;
351
379
FILE *conffp;
352
380
struct dirent **direntries = NULL;
414
442
.doc = "Group ID the plugins will run as", .group = 3 },
415
443
{ .name = "debug", .key = 132,
416
444
.doc = "Debug mode", .group = 4 },
445
{ .name = "plugin-helper-dir", .key = 133,
446
.arg = "DIRECTORY",
447
.doc = "Specify a different plugin helper directory",
448
.group = 2 },
417
449
/*
418
450
* These reproduce what we would get without ARGP_NO_HELP
419
451
*/
545
577
case 132: /* --debug */
546
578
debug = true;
547
579
break;
580
case 133: /* --plugin-helper-dir */
581
free(pluginhelperdir);
582
pluginhelperdir = strdup(arg);
583
if(pluginhelperdir != NULL){
584
errno = 0;
585
}
586
break;
548
587
/*
549
588
* These reproduce what we would get without ARGP_NO_HELP
550
589
*/
551
590
case '?': /* --help */
552
591
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
553
592
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
593
__builtin_unreachable();
554
594
case -3: /* --usage */
555
595
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
556
596
argp_state_help(state, state->out_stream,
557
597
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
598
__builtin_unreachable();
558
599
case 'V': /* --version */
559
600
fprintf(state->out_stream, "%s\n", argp_program_version);
560
601
exit(EXIT_SUCCESS);
570
611
if(arg[0] == '\0'){
571
612
break;
572
613
}
614
#if __GNUC__ >= 7
615
__attribute__((fallthrough));
616
#else
617
/* FALLTHROUGH */
618
#endif
573
619
default:
574
620
return ARGP_ERR_UNKNOWN;
575
621
}
601
647
case 130: /* --userid */
602
648
case 131: /* --groupid */
603
649
case 132: /* --debug */
650
case 133: /* --plugin-helper-dir */
604
651
case '?': /* --help */
605
652
case -3: /* --usage */
606
653
case 'V': /* --version */
686
733
687
734
custom_argc += 1;
688
735
{
689
char **new_argv = realloc(custom_argv, sizeof(char *)
690
* ((unsigned int)
691
custom_argc + 1));
736
#if defined(__GLIBC_PREREQ) and __GLIBC_PREREQ(2, 26)
737
char **new_argv = reallocarray(custom_argv, (size_t)custom_argc + 1,
738
sizeof(char *));
739
#else
740
char **new_argv = NULL;
741
if(((size_t)custom_argc + 1) > (SIZE_MAX / sizeof(char *))){
742
/* overflow */
743
errno = ENOMEM;
744
} else {
745
new_argv = realloc(custom_argv, ((size_t)custom_argc + 1)
746
* sizeof(char *));
747
}
748
#endif
692
749
if(new_argv == NULL){
693
error(0, errno, "realloc");
750
error(0, errno, "reallocarray");
694
751
exitstatus = EX_OSERR;
695
752
free(new_arg);
696
753
free(org_line);
761
818
goto fallback;
762
819
}
763
820
821
{
822
char *pluginhelperenv;
823
bool bret = true;
824
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
825
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
826
if(ret != -1){
827
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
828
}
829
if(ret == -1 or not bret){
830
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
831
" environment variable to \"%s\" for all plugins\n",
832
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
833
}
834
if(ret != -1){
835
free(pluginhelperenv);
836
}
837
}
838
764
839
if(debug){
765
for(plugin *p = plugin_list; p != NULL; p=p->next){
840
for(plugin *p = plugin_list; p != NULL; p = p->next){
766
841
fprintf(stderr, "Plugin: %s has %d arguments\n",
767
842
p->name ? p->name : "Global", p->argc - 1);
768
843
for(char **a = p->argv; *a != NULL; a++){
777
852
778
853
if(getuid() == 0){
779
854
/* Work around Debian bug #633582:
780
<http://bugs.debian.org/633582> */
855
<https://bugs.debian.org/633582> */
781
856
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
782
857
if(plugindir_fd == -1){
783
858
if(errno != ENOENT){
795
870
}
796
871
}
797
872
}
798
TEMP_FAILURE_RETRY(close(plugindir_fd));
873
close(plugindir_fd);
874
}
875
876
/* Work around Debian bug #981302
877
<https://bugs.debian.org/981302> */
878
if(lstat("/dev/fd", &st) != 0 and errno == ENOENT){
879
ret = symlink("/proc/self/fd", "/dev/fd");
880
if(ret == -1){
881
error(0, errno, "Failed to create /dev/fd symlink");
882
}
799
883
}
800
884
}
801
885
860
944
return 1;
861
945
}
862
946
863
#ifdef __GLIBC__
864
#if __GLIBC_PREREQ(2, 15)
865
947
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
866
948
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
949
if(numplugins == -1){
876
950
error(0, errno, "Could not scan plugin dir");
877
951
direntries = NULL;
893
967
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
894
968
if(ret == -1){
895
969
error(0, errno, "stat");
896
TEMP_FAILURE_RETRY(close(plugin_fd));
970
close(plugin_fd);
897
971
free(direntries[i]);
898
972
continue;
899
973
}
908
982
plugindir != NULL ? plugindir : PDIR,
909
983
direntries[i]->d_name);
910
984
}
911
TEMP_FAILURE_RETRY(close(plugin_fd));
985
close(plugin_fd);
912
986
free(direntries[i]);
913
987
continue;
914
988
}
916
990
plugin *p = getplugin(direntries[i]->d_name);
917
991
if(p == NULL){
918
992
error(0, errno, "getplugin");
919
TEMP_FAILURE_RETRY(close(plugin_fd));
993
close(plugin_fd);
920
994
free(direntries[i]);
921
995
continue;
922
996
}
925
999
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
926
1000
direntries[i]->d_name);
927
1001
}
928
TEMP_FAILURE_RETRY(close(plugin_fd));
1002
close(plugin_fd);
929
1003
free(direntries[i]);
930
1004
continue;
931
1005
}
971
1045
if(pipefd[0] >= FD_SETSIZE){
972
1046
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
973
1047
FD_SETSIZE);
974
TEMP_FAILURE_RETRY(close(pipefd[0]));
975
TEMP_FAILURE_RETRY(close(pipefd[1]));
1048
close(pipefd[0]);
1049
close(pipefd[1]);
976
1050
exitstatus = EX_OSERR;
977
1051
free(direntries[i]);
978
1052
goto fallback;
982
1056
ret = set_cloexec_flag(pipefd[0]);
983
1057
if(ret < 0){
984
1058
error(0, errno, "set_cloexec_flag");
985
TEMP_FAILURE_RETRY(close(pipefd[0]));
986
TEMP_FAILURE_RETRY(close(pipefd[1]));
1059
close(pipefd[0]);
1060
close(pipefd[1]);
987
1061
exitstatus = EX_OSERR;
988
1062
free(direntries[i]);
989
1063
goto fallback;
991
1065
ret = set_cloexec_flag(pipefd[1]);
992
1066
if(ret < 0){
993
1067
error(0, errno, "set_cloexec_flag");
994
TEMP_FAILURE_RETRY(close(pipefd[0]));
995
TEMP_FAILURE_RETRY(close(pipefd[1]));
1068
close(pipefd[0]);
1069
close(pipefd[1]);
996
1070
exitstatus = EX_OSERR;
997
1071
free(direntries[i]);
998
1072
goto fallback;
1017
1091
error(0, errno, "fork");
1018
1092
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1019
1093
&sigchld_action.sa_mask, NULL));
1020
TEMP_FAILURE_RETRY(close(pipefd[0]));
1021
TEMP_FAILURE_RETRY(close(pipefd[1]));
1094
close(pipefd[0]);
1095
close(pipefd[1]);
1022
1096
exitstatus = EX_OSERR;
1023
1097
free(direntries[i]);
1024
1098
goto fallback;
1052
1126
/* no return */
1053
1127
}
1054
1128
/* Parent process */
1055
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1056
pipe */
1057
TEMP_FAILURE_RETRY(close(plugin_fd));
1129
close(pipefd[1]); /* Close unused write end of pipe */
1130
close(plugin_fd);
1058
1131
plugin *new_plugin = getplugin(direntries[i]->d_name);
1059
1132
if(new_plugin == NULL){
1060
1133
error(0, errno, "getplugin");
1072
1145
1073
1146
new_plugin->pid = pid;
1074
1147
new_plugin->fd = pipefd[0];
1075
1148
1149
if(debug){
1150
fprintf(stderr, "Plugin %s started (PID %" PRIdMAX ")\n",
1151
new_plugin->name, (intmax_t) (new_plugin->pid));
1152
}
1153
1076
1154
/* Unblock SIGCHLD so signal handler can be run if this process
1077
1155
has already completed */
1078
1156
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1084
1162
goto fallback;
1085
1163
}
1086
1164
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
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
1165
FD_SET(new_plugin->fd, &rfds_all);
1101
1166
1102
1167
if(maxfd < new_plugin->fd){
1103
1168
maxfd = new_plugin->fd;
1106
1171
1107
1172
free(direntries);
1108
1173
direntries = NULL;
1109
TEMP_FAILURE_RETRY(close(dir_fd));
1174
close(dir_fd);
1110
1175
dir_fd = -1;
1111
1176
free_plugin(getplugin(NULL));
1112
1177
1152
1217
(intmax_t) (proc->pid),
1153
1218
WTERMSIG(proc->status),
1154
1219
strsignal(WTERMSIG(proc->status)));
1155
} else if(WCOREDUMP(proc->status)){
1156
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1157
" core\n", proc->name, (intmax_t) (proc->pid));
1158
1220
}
1159
1221
}
1160
1222
1161
1223
/* 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
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
1224
FD_CLR(proc->fd, &rfds_all);
1176
1225
1177
1226
/* Block signal while modifying process_list */
1178
1227
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1218
1267
}
1219
1268
1220
1269
/* 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
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1228
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
1270
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1238
1271
/* This process had nothing to say at this time */
1239
1272
proc = proc->next;
1240
1273
continue;
1310
1343
free(direntries);
1311
1344
1312
1345
if(dir_fd != -1){
1313
TEMP_FAILURE_RETRY(close(dir_fd));
1346
close(dir_fd);
1314
1347
}
1315
1348
1316
1349
/* Kill the processes */
1336
1369
free_plugin_list();
1337
1370
1338
1371
free(plugindir);
1372
free(pluginhelperdir);
1339
1373
free(argfile);
1340
1374
1341
1375
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0