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51 lines
1.6 KiB
C
51 lines
1.6 KiB
C
/* Copyright (C) 1991, 1992, 1993, 1994, 1995, 1997 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library 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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <ansidecl.h>
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#include <errno.h>
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#include <stddef.h>
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#include <unistd.h>
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#include <hurd.h>
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#include <fcntl.h>
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#include <hurd/port.h>
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/* Change the current root to FILE_NAME. */
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int
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DEFUN(chroot, (file_name), CONST char *file_name)
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{
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error_t err;
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file_t file, dir, root;
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file = __file_name_lookup (file_name, O_EXEC, 0);
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if (file == MACH_PORT_NULL)
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return -1;
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dir = __file_name_lookup_under (file, "", O_EXEC, 0);
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__mach_port_deallocate (__mach_task_self (), file);
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if (dir == MACH_PORT_NULL)
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return -1;
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/* Prevent going through DIR's .. */
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err = __file_reparent (dir, MACH_PORT_NULL, &root);
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__mach_port_deallocate (__mach_task_self (), dir);
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if (err)
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return __hurd_fail (err);
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_hurd_port_set (&_hurd_ports[INIT_PORT_CRDIR], root);
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return 0;
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}
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