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50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
/* Copyright (C) 1999-2020 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 Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the 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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <unistd.h>
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#include <hurd.h>
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#include <hurd/fd.h>
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#include <hurd/port.h>
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/* Change the current root directory to FD. */
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int
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fchroot (int fd)
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{
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error_t err;
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file_t dir;
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err = HURD_DPORT_USE (fd,
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({
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dir = __file_name_lookup_under (port, ".", 0, 0);
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dir == MACH_PORT_NULL ? errno : 0;
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}));
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if (! err)
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{
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file_t root;
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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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_hurd_port_set (&_hurd_ports[INIT_PORT_CRDIR], root);
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}
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return err ? __hurd_fail (err) : 0;
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}
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