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77 lines
1.8 KiB
C
77 lines
1.8 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini chroot implementation for busybox
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*
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*
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* Copyright (C) 1999,2000 by Lineo, inc.
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* Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include "internal.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <errno.h>
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static const char chroot_usage[] = "chroot NEWROOT [COMMAND...]\n\n"
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"Run COMMAND with root directory set to NEWROOT.\n";
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int chroot_main(int argc, char **argv)
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{
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if ((argc < 2) || (**(argv + 1) == '-')) {
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usage(chroot_usage);
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}
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argc--;
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argv++;
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if (chroot(*argv) || (chdir("/"))) {
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fprintf(stderr, "chroot: cannot change root directory to %s: %s\n",
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*argv, strerror(errno));
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exit(FALSE);
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}
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argc--;
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argv++;
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if (argc >= 1) {
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fprintf(stderr, "command: %s\n", *argv);
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execvp(*argv, argv);
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} else {
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char *prog;
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prog = getenv("SHELL");
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if (!prog)
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prog = "/bin/sh";
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execlp(prog, prog, NULL);
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}
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fprintf(stderr, "chroot: cannot execute %s: %s\n",
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*argv, strerror(errno));
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exit(FALSE);
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}
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/*
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Local Variables:
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c-file-style: "linux"
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c-basic-offset: 4
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tab-width: 4
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End:
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*/
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