others
/* $Id$ */
/* Copyright (c) 2014 Pierre Pronchery <khorben@defora.org> */
/* This file is part of DeforaOS Unix others */
/* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#ifndef PROGNAME
# define PROGNAME "chroot"
#endif
/* private */
/* prototypes */
static int _chroot(char const * pathname, char const * command);
static int _chroot_error(char const * message, int ret);
static int _chroot_usage(void);
/* functions */
/* chroot */
static int _chroot(char const * pathname, char const * command)
{
char const * shell;
if(chroot(pathname) != 0)
return _chroot_error(pathname, 2);
if((shell = getenv("SHELL")) == NULL)
shell = "/bin/sh";
if(command != NULL)
execl(shell, shell, "-c", command, NULL);
else
execl(shell, shell, NULL);
return 0;
}
/* chroot_error */
static int _chroot_error(char const * message, int ret)
{
fputs(PROGNAME ": ", stderr);
perror(message);
return ret;
}
/* chroot_usage */
static int _chroot_usage(void)
{
fputs("Usage: " PROGNAME " path [command]\n", stderr);
return 1;
}
/* public */
/* functions */
/* main */
int main(int argc, char * argv[])
{
int o;
while((o = getopt(argc, argv, "")) != -1)
return _chroot_usage();
if(argc - optind != 1 && argc - optind != 2)
return _chroot_usage();
return (_chroot(argv[optind], argv[optind + 1]) == 0) ? 0 : 2;
}