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- Committer: Teddy Hogeborn
- Date: 2014-10-05 20:08:58 UTC
- mto: This revision was merged to the branch mainline in revision 736.
- Revision ID: teddy@recompile.se-20141005200858-uw6lfgqq8lod1edf
Tags: version-1.6.9-1
* Makefile (version): Changed to "1.6.9".
* NEWS (Version 1.6.9): New entry.
* debian/changelog (1.6.9-1): - '' -
* NEWS (Version 1.6.9): New entry.
* debian/changelog (1.6.9-1): - '' -
added
removed
plugin-runner.c
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2008-2017 Teddy Hogeborn
6
* Copyright © 2008-2017 Björn Påhlsson
5
* Copyright © 2008-2014 Teddy Hogeborn
6
* Copyright © 2008-2014 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
37
37
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
38
38
FD_SET(), FD_ISSET(), FD_CLR */
39
39
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
40
WEXITSTATUS(), WTERMSIG() */
40
WEXITSTATUS(), WTERMSIG(),
41
WCOREDUMP() */
41
42
#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
42
43
#include <iso646.h> /* and, or, not */
43
44
#include <dirent.h> /* struct dirent, scandirat() */
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;
347
347
348
348
int main(int argc, char *argv[]){
349
349
char *plugindir = NULL;
350
char *pluginhelperdir = NULL;
351
350
char *argfile = NULL;
352
351
FILE *conffp;
353
352
struct dirent **direntries = NULL;
415
414
.doc = "Group ID the plugins will run as", .group = 3 },
416
415
{ .name = "debug", .key = 132,
417
416
.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
417
/*
423
418
* These reproduce what we would get without ARGP_NO_HELP
424
419
*/
550
545
case 132: /* --debug */
551
546
debug = true;
552
547
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
548
/*
561
549
* These reproduce what we would get without ARGP_NO_HELP
562
550
*/
613
601
case 130: /* --userid */
614
602
case 131: /* --groupid */
615
603
case 132: /* --debug */
616
case 133: /* --plugin-helper-dir */
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604
case '?': /* --help */
618
605
case -3: /* --usage */
619
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case 'V': /* --version */
700
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custom_argc += 1;
701
688
{
702
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char **new_argv = realloc(custom_argv, sizeof(char *)
703
* ((size_t)custom_argc + 1));
690
* ((unsigned int)
691
custom_argc + 1));
704
692
if(new_argv == NULL){
705
693
error(0, errno, "realloc");
706
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exitstatus = EX_OSERR;
773
761
goto fallback;
774
762
}
775
763
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
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764
if(debug){
795
for(plugin *p = plugin_list; p != NULL; p = p->next){
765
for(plugin *p = plugin_list; p != NULL; p=p->next){
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fprintf(stderr, "Plugin: %s has %d arguments\n",
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p->name ? p->name : "Global", p->argc - 1);
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for(char **a = p->argv; *a != NULL; a++){
807
777
808
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if(getuid() == 0){
809
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/* Work around Debian bug #633582:
810
<https://bugs.debian.org/633582> */
780
<http://bugs.debian.org/633582> */
811
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int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
812
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if(plugindir_fd == -1){
813
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if(errno != ENOENT){
825
795
}
826
796
}
827
797
}
828
close(plugindir_fd);
798
TEMP_FAILURE_RETRY(close(plugindir_fd));
829
799
}
830
800
}
831
801
890
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return 1;
891
861
}
892
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863
#ifdef __GLIBC__
864
#if __GLIBC_PREREQ(2, 15)
893
865
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
894
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__ */
895
875
if(numplugins == -1){
896
876
error(0, errno, "Could not scan plugin dir");
897
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direntries = NULL;
913
893
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
914
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if(ret == -1){
915
895
error(0, errno, "stat");
916
close(plugin_fd);
896
TEMP_FAILURE_RETRY(close(plugin_fd));
917
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free(direntries[i]);
918
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continue;
919
899
}
928
908
plugindir != NULL ? plugindir : PDIR,
929
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direntries[i]->d_name);
930
910
}
931
close(plugin_fd);
911
TEMP_FAILURE_RETRY(close(plugin_fd));
932
912
free(direntries[i]);
933
913
continue;
934
914
}
936
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plugin *p = getplugin(direntries[i]->d_name);
937
917
if(p == NULL){
938
918
error(0, errno, "getplugin");
939
close(plugin_fd);
919
TEMP_FAILURE_RETRY(close(plugin_fd));
940
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free(direntries[i]);
941
921
continue;
942
922
}
945
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fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
946
926
direntries[i]->d_name);
947
927
}
948
close(plugin_fd);
928
TEMP_FAILURE_RETRY(close(plugin_fd));
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929
free(direntries[i]);
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930
continue;
951
931
}
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if(pipefd[0] >= FD_SETSIZE){
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fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
993
973
FD_SETSIZE);
994
close(pipefd[0]);
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close(pipefd[1]);
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TEMP_FAILURE_RETRY(close(pipefd[0]));
975
TEMP_FAILURE_RETRY(close(pipefd[1]));
996
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exitstatus = EX_OSERR;
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free(direntries[i]);
998
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goto fallback;
1002
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ret = set_cloexec_flag(pipefd[0]);
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983
if(ret < 0){
1004
984
error(0, errno, "set_cloexec_flag");
1005
close(pipefd[0]);
1006
close(pipefd[1]);
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TEMP_FAILURE_RETRY(close(pipefd[0]));
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TEMP_FAILURE_RETRY(close(pipefd[1]));
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exitstatus = EX_OSERR;
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free(direntries[i]);
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goto fallback;
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ret = set_cloexec_flag(pipefd[1]);
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992
if(ret < 0){
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error(0, errno, "set_cloexec_flag");
1014
close(pipefd[0]);
1015
close(pipefd[1]);
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TEMP_FAILURE_RETRY(close(pipefd[0]));
995
TEMP_FAILURE_RETRY(close(pipefd[1]));
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exitstatus = EX_OSERR;
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free(direntries[i]);
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998
goto fallback;
1037
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error(0, errno, "fork");
1038
1018
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1039
1019
&sigchld_action.sa_mask, NULL));
1040
close(pipefd[0]);
1041
close(pipefd[1]);
1020
TEMP_FAILURE_RETRY(close(pipefd[0]));
1021
TEMP_FAILURE_RETRY(close(pipefd[1]));
1042
1022
exitstatus = EX_OSERR;
1043
1023
free(direntries[i]);
1044
1024
goto fallback;
1072
1052
/* no return */
1073
1053
}
1074
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/* Parent process */
1075
close(pipefd[1]); /* Close unused write end of pipe */
1076
close(plugin_fd);
1055
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1056
pipe */
1057
TEMP_FAILURE_RETRY(close(plugin_fd));
1077
1058
plugin *new_plugin = getplugin(direntries[i]->d_name);
1078
1059
if(new_plugin == NULL){
1079
1060
error(0, errno, "getplugin");
1103
1084
goto fallback;
1104
1085
}
1105
1086
1106
FD_SET(new_plugin->fd, &rfds_all);
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
1107
1101
1108
1102
if(maxfd < new_plugin->fd){
1109
1103
maxfd = new_plugin->fd;
1112
1106
1113
1107
free(direntries);
1114
1108
direntries = NULL;
1115
close(dir_fd);
1109
TEMP_FAILURE_RETRY(close(dir_fd));
1116
1110
dir_fd = -1;
1117
1111
free_plugin(getplugin(NULL));
1118
1112
1158
1152
(intmax_t) (proc->pid),
1159
1153
WTERMSIG(proc->status),
1160
1154
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));
1161
1158
}
1162
1159
}
1163
1160
1164
1161
/* Remove the plugin */
1165
FD_CLR(proc->fd, &rfds_all);
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
1166
1176
1167
1177
/* Block signal while modifying process_list */
1168
1178
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1208
1218
}
1209
1219
1210
1220
/* This process has not completed. Does it have any output? */
1211
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
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
1212
1238
/* This process had nothing to say at this time */
1213
1239
proc = proc->next;
1214
1240
continue;
1284
1310
free(direntries);
1285
1311
1286
1312
if(dir_fd != -1){
1287
close(dir_fd);
1313
TEMP_FAILURE_RETRY(close(dir_fd));
1288
1314
}
1289
1315
1290
1316
/* Kill the processes */
1310
1336
free_plugin_list();
1311
1337
1312
1338
free(plugindir);
1313
free(pluginhelperdir);
1314
1339
free(argfile);
1315
1340
1316
1341
return exitstatus;
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