3 // Copyright (C) 2003 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
5 // This program is free software; you can redistribute it and/or modify
6 // it under the terms of the GNU General Public License as published by
7 // the Free Software Foundation; either version 2, or (at your option)
10 // This program is distributed in the hope that it will be useful,
11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 // GNU General Public License for more details.
15 // You should have received a copy of the GNU General Public License
16 // along with this program; if not, write to the Free Software
17 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 // Executes a program in a new namespace
20 // Based on http://www.win.tue.nl/~aeb/linux/lk/lk-6.html
28 #include "stack-start.h"
29 #include "sys_clone.h"
37 #include <sys/types.h>
42 #define ENSC_WRAPPERS_PREFIX "new-namespace: "
43 #define ENSC_WRAPPERS_WAIT 1
47 # define CLONE_NEWNS 0x00020000
50 int wrapper_exit_code = 255;
53 showHelp(int fd, char const *cmd, int exit_code)
55 VSERVER_DECLARE_CMD(cmd);
57 WRITE_MSG(fd, "Usage: ");
60 " [--help] [--version] <cmd> <args*>\n"
62 "Executes <cmd> in a new namespace.\n"
64 "Report bugs to " PACKAGE_BUGREPORT "\n");
73 "new-namespace " VERSION " -- executes programs in a new namespace\n"
74 "This program is part of " PACKAGE_STRING "\n"
75 "Copyright (C) 2003 Enrico Scholz\n"
76 VERSION_COPYRIGHT_DISCLAIMER);
80 int main(int argc, char *argv[])
84 if (argc==1) showHelp(2, argv[0], 255);
85 if (!strcmp(argv[1], "--help")) showHelp(1, argv[0], 0);
86 if (!strcmp(argv[1], "--version")) showVersion();
87 if (!strcmp(argv[1], "--")) ++argv;
91 pid = sys_clone(CLONE_NEWNS|CLONE_VFORK|SIGCHLD, 0);
93 pid = sys_clone(CLONE_NEWNS|SIGCHLD, 0);
97 perror("new-namespace: clone()");
98 exit(wrapper_exit_code);
100 execvp(argv[1], argv+1);
101 perror("new-namespace: execvp()");
102 exit(wrapper_exit_code);
104 exitLikeProcess(pid);