77 lines
1.8 KiB
C
77 lines
1.8 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* Mini chroot implementation for busybox
|
|
*
|
|
*
|
|
* Copyright (C) 1999,2000 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);
|
|
}
|
|
|
|
|
|
/*
|
|
Local Variables:
|
|
c-file-style: "linux"
|
|
c-basic-offset: 4
|
|
tab-width: 4
|
|
End:
|
|
*/
|