3
3
* Mandos plugin runner - Run Mandos plugins
5
* Copyright © 2008-2018 Teddy Hogeborn
6
* Copyright © 2008-2018 Björn Påhlsson
8
* This file is part of Mandos.
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.
15
* Mandos is distributed in the hope that it will be useful, but
5
* Copyright © 2008-2014 Teddy Hogeborn
6
* Copyright © 2008-2014 Björn Påhlsson
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.
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.
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/>.
23
22
* Contact the authors at <mandos@recompile.se>.
38
37
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
39
38
FD_SET(), FD_ISSET(), FD_CLR */
40
39
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
WEXITSTATUS(), WTERMSIG() */
40
WEXITSTATUS(), WTERMSIG(),
42
42
#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
43
43
#include <iso646.h> /* and, or, not */
44
44
#include <dirent.h> /* struct dirent, scandirat() */
416
414
.doc = "Group ID the plugins will run as", .group = 3 },
417
415
{ .name = "debug", .key = 132,
418
416
.doc = "Debug mode", .group = 4 },
419
{ .name = "plugin-helper-dir", .key = 133,
421
.doc = "Specify a different plugin helper directory",
424
418
* These reproduce what we would get without ARGP_NO_HELP
702
687
custom_argc += 1;
704
689
char **new_argv = realloc(custom_argv, sizeof(char *)
705
* ((size_t)custom_argc + 1));
706
692
if(new_argv == NULL){
707
693
error(0, errno, "realloc");
708
694
exitstatus = EX_OSERR;
779
char *pluginhelperenv;
781
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
782
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
784
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
786
if(ret == -1 or not bret){
787
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
788
" environment variable to \"%s\" for all plugins\n",
789
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
792
free(pluginhelperenv);
797
for(plugin *p = plugin_list; p != NULL; p = p->next){
765
for(plugin *p = plugin_list; p != NULL; p=p->next){
798
766
fprintf(stderr, "Plugin: %s has %d arguments\n",
799
767
p->name ? p->name : "Global", p->argc - 1);
800
768
for(char **a = p->argv; *a != NULL; a++){
810
778
if(getuid() == 0){
811
779
/* Work around Debian bug #633582:
812
<https://bugs.debian.org/633582> */
780
<http://bugs.debian.org/633582> */
813
781
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
814
782
if(plugindir_fd == -1){
815
783
if(errno != ENOENT){
864
#if __GLIBC_PREREQ(2, 15)
895
865
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
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__ */
897
875
if(numplugins == -1){
898
876
error(0, errno, "Could not scan plugin dir");
899
877
direntries = NULL;
909
887
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
910
888
if(plugin_fd == -1){
911
889
error(0, errno, "Could not open plugin");
915
892
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
917
894
error(0, errno, "stat");
895
TEMP_FAILURE_RETRY(close(plugin_fd));
930
906
plugindir != NULL ? plugindir : PDIR,
931
907
direntries[i]->d_name);
909
TEMP_FAILURE_RETRY(close(plugin_fd));
938
913
plugin *p = getplugin(direntries[i]->d_name);
940
915
error(0, errno, "getplugin");
916
TEMP_FAILURE_RETRY(close(plugin_fd));
988
961
error(0, errno, "pipe");
989
962
exitstatus = EX_OSERR;
993
965
if(pipefd[0] >= FD_SETSIZE){
994
966
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
968
TEMP_FAILURE_RETRY(close(pipefd[0]));
969
TEMP_FAILURE_RETRY(close(pipefd[1]));
998
970
exitstatus = EX_OSERR;
1002
973
#ifndef O_CLOEXEC
1004
975
ret = set_cloexec_flag(pipefd[0]);
1006
977
error(0, errno, "set_cloexec_flag");
978
TEMP_FAILURE_RETRY(close(pipefd[0]));
979
TEMP_FAILURE_RETRY(close(pipefd[1]));
1009
980
exitstatus = EX_OSERR;
1010
free(direntries[i]);
1013
983
ret = set_cloexec_flag(pipefd[1]);
1015
985
error(0, errno, "set_cloexec_flag");
986
TEMP_FAILURE_RETRY(close(pipefd[0]));
987
TEMP_FAILURE_RETRY(close(pipefd[1]));
1018
988
exitstatus = EX_OSERR;
1019
free(direntries[i]);
1022
991
#endif /* not O_CLOEXEC */
1039
1007
error(0, errno, "fork");
1040
1008
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1041
1009
&sigchld_action.sa_mask, NULL));
1010
TEMP_FAILURE_RETRY(close(pipefd[0]));
1011
TEMP_FAILURE_RETRY(close(pipefd[1]));
1044
1012
exitstatus = EX_OSERR;
1045
free(direntries[i]);
1074
1041
/* no return */
1076
1043
/* Parent process */
1077
close(pipefd[1]); /* Close unused write end of pipe */
1044
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1046
TEMP_FAILURE_RETRY(close(plugin_fd));
1079
1047
plugin *new_plugin = getplugin(direntries[i]->d_name);
1080
1048
if(new_plugin == NULL){
1081
1049
error(0, errno, "getplugin");
1086
1054
error(0, errno, "sigprocmask");
1088
1056
exitstatus = EX_OSERR;
1089
free(direntries[i]);
1092
free(direntries[i]);
1094
1060
new_plugin->pid = pid;
1095
1061
new_plugin->fd = pipefd[0];
1098
fprintf(stderr, "Plugin %s started (PID %" PRIdMAX ")\n",
1099
new_plugin->name, (intmax_t) (new_plugin->pid));
1102
1063
/* Unblock SIGCHLD so signal handler can be run if this process
1103
1064
has already completed */
1104
1065
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1113
FD_SET(new_plugin->fd, &rfds_all);
1074
#if defined (__GNUC__) and defined (__GLIBC__)
1075
#if not __GLIBC_PREREQ(2, 16)
1076
#pragma GCC diagnostic push
1077
#pragma GCC diagnostic ignored "-Wsign-conversion"
1080
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1081
-Wconversion in GNU libc
1083
#if defined (__GNUC__) and defined (__GLIBC__)
1084
#if not __GLIBC_PREREQ(2, 16)
1085
#pragma GCC diagnostic pop
1115
1089
if(maxfd < new_plugin->fd){
1116
1090
maxfd = new_plugin->fd;
1165
1139
(intmax_t) (proc->pid),
1166
1140
WTERMSIG(proc->status),
1167
1141
strsignal(WTERMSIG(proc->status)));
1142
} else if(WCOREDUMP(proc->status)){
1143
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1144
" core\n", proc->name, (intmax_t) (proc->pid));
1171
1148
/* Remove the plugin */
1172
FD_CLR(proc->fd, &rfds_all);
1149
#if defined (__GNUC__) and defined (__GLIBC__)
1150
#if not __GLIBC_PREREQ(2, 16)
1151
#pragma GCC diagnostic push
1152
#pragma GCC diagnostic ignored "-Wsign-conversion"
1155
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1156
-Wconversion in GNU libc
1158
#if defined (__GNUC__) and defined (__GLIBC__)
1159
#if not __GLIBC_PREREQ(2, 16)
1160
#pragma GCC diagnostic pop
1174
1164
/* Block signal while modifying process_list */
1175
1165
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1217
1207
/* This process has not completed. Does it have any output? */
1218
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1208
#if defined (__GNUC__) and defined (__GLIBC__)
1209
#if not __GLIBC_PREREQ(2, 16)
1210
#pragma GCC diagnostic push
1211
#pragma GCC diagnostic ignored "-Wsign-conversion"
1214
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1220
#if defined (__GNUC__) and defined (__GLIBC__)
1221
#if not __GLIBC_PREREQ(2, 16)
1222
#pragma GCC diagnostic pop
1219
1225
/* This process had nothing to say at this time */
1220
1226
proc = proc->next;
added
removed
plugin-runner.c
