mirror of
git://git.sv.gnu.org/coreutils.git
synced 2026-03-10 15:04:07 +02:00
108 lines
2.7 KiB
C
108 lines
2.7 KiB
C
/* chroot -- run command or shell with special root directory
|
|
Copyright (C) 95, 96, 1997, 1999, 2000 Free Software Foundation, Inc.
|
|
|
|
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, 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. */
|
|
|
|
/* Written by Roland McGrath. */
|
|
|
|
#include <config.h>
|
|
#include <stdio.h>
|
|
#include <sys/types.h>
|
|
|
|
#include "system.h"
|
|
#include "long-options.h"
|
|
#include "error.h"
|
|
#include "closeout.h"
|
|
|
|
/* The official name of this program (e.g., no `g' prefix). */
|
|
#define PROGRAM_NAME "chroot"
|
|
|
|
#define AUTHORS "Roland McGrath"
|
|
|
|
/* The name this program was run with, for error messages. */
|
|
char *program_name;
|
|
|
|
void
|
|
usage (int status)
|
|
{
|
|
if (status != 0)
|
|
fprintf (stderr, _("Try `%s --help' for more information.\n"),
|
|
program_name);
|
|
else
|
|
{
|
|
printf (_("\
|
|
Usage: %s NEWROOT [COMMAND...]\n\
|
|
or: %s OPTION\n\
|
|
"), program_name, program_name);
|
|
printf (_("\
|
|
Run COMMAND with root directory set to NEWROOT.\n\
|
|
\n\
|
|
--help display this help and exit\n\
|
|
--version output version information and exit\n\
|
|
\n\
|
|
If no command is given, run ``${SHELL} -i'' (default: /bin/sh).\n\
|
|
"));
|
|
puts (_("\nReport bugs to <bug-sh-utils@gnu.org>."));
|
|
}
|
|
exit (status);
|
|
}
|
|
|
|
int
|
|
main (int argc, char **argv)
|
|
{
|
|
program_name = argv[0];
|
|
setlocale (LC_ALL, "");
|
|
bindtextdomain (PACKAGE, LOCALEDIR);
|
|
textdomain (PACKAGE);
|
|
|
|
atexit (close_stdout);
|
|
|
|
parse_long_options (argc, argv, PROGRAM_NAME, GNU_PACKAGE, VERSION,
|
|
AUTHORS, usage);
|
|
if (argc == 1)
|
|
{
|
|
error (0, 0, _("too few arguments"));
|
|
usage (1);
|
|
}
|
|
|
|
if (chroot (argv[1]))
|
|
error (1, errno, _("cannot change root directory to %s"), argv[1]);
|
|
|
|
if (chdir ("/"))
|
|
error (1, errno, _("cannot chdir to root directory"));
|
|
|
|
if (argc == 2)
|
|
{
|
|
/* No command. Run an interactive shell. */
|
|
char *shell = getenv ("SHELL");
|
|
if (shell == NULL)
|
|
shell = "/bin/sh";
|
|
argv[0] = shell;
|
|
argv[1] = "-i";
|
|
}
|
|
else
|
|
{
|
|
/* The following arguments give the command. */
|
|
argv += 2;
|
|
}
|
|
|
|
/* Execute the given command. */
|
|
execvp (argv[0], argv);
|
|
error (1, errno, _("cannot execute %s"), argv[0]);
|
|
|
|
exit (1);
|
|
return 1;
|
|
}
|