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/* vi: set sw=4 ts=4: */
/*
* Mini chroot implementation for busybox
*
*
* Copyright (C) 1999 by Lineo, inc.
* Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "internal.h"
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
static const char chroot_usage[] = "chroot NEWROOT [COMMAND...]\n\n"
"Run COMMAND with root directory set to NEWROOT.\n";
int chroot_main(int argc, char **argv)
{
if ((argc < 2) || (**(argv + 1) == '-')) {
usage(chroot_usage);
}
argc--;
argv++;
if (chroot(*argv) || (chdir("/"))) {
fprintf(stderr, "chroot: cannot change root directory to %s: %s\n",
*argv, strerror(errno));
exit(FALSE);
}
argc--;
argv++;
if (argc >= 1) {
fprintf(stderr, "command: %s\n", *argv);
execvp(*argv, argv);
} else {
char *prog;
prog = getenv("SHELL");
if (!prog)
prog = "/bin/sh";
execlp(prog, prog, NULL);
}
fprintf(stderr, "chroot: cannot execute %s: %s\n",
*argv, strerror(errno));
exit(FALSE);
}
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