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glibc/hurd/hurdfchdir.c
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/* Change a port cell to a directory in an open file descriptor. | |
Copyright (C) 1999-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
The GNU C Library is free software; you can redistribute it and/or | |
modify it under the terms of the GNU Lesser General Public | |
License as published by the Free Software Foundation; either | |
version 2.1 of the License, or (at your option) any later version. | |
The GNU C Library 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 | |
Lesser General Public License for more details. | |
You should have received a copy of the GNU Lesser General Public | |
License along with the GNU C Library; if not, see | |
<http://www.gnu.org/licenses/>. */ | |
#include <errno.h> | |
#include <unistd.h> | |
#include <hurd.h> | |
#include <hurd/port.h> | |
#include <hurd/fd.h> | |
#include <fcntl.h> | |
int | |
_hurd_change_directory_port_from_fd (struct hurd_port *portcell, int fd) | |
{ | |
int ret; | |
struct hurd_fd *d = _hurd_fd_get (fd); | |
if (!d) | |
return __hurd_fail (EBADF); | |
HURD_CRITICAL_BEGIN; | |
ret = HURD_PORT_USE (&d->port, | |
({ | |
int ret; | |
/* We look up "." to force ENOTDIR if it's not a | |
directory and EACCES if we don't have search | |
permission. */ | |
file_t dir = __file_name_lookup_under (port, ".", | |
O_NOTRANS, 0); | |
if (dir == MACH_PORT_NULL) | |
ret = -1; | |
else | |
{ | |
_hurd_port_set (portcell, dir); | |
ret = 0; | |
} | |
ret; | |
})); | |
HURD_CRITICAL_END; | |
return ret; | |
} |