mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-15 01:21:06 +00:00
63 lines
1.7 KiB
C
63 lines
1.7 KiB
C
/* Change a port cell to a directory in an open file descriptor.
|
|
Copyright (C) 1999-2023 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
|
|
<https://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);
|
|
|
|
retry:
|
|
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;
|
|
if (ret == -1 && errno == EINTR)
|
|
/* Got a signal while inside an RPC of the critical section, retry again */
|
|
goto retry;
|
|
|
|
return ret;
|
|
}
|