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/* Copyright (C) 2005-2021 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 <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <stddef.h>
#include <sys/stat.h>
#include <not-cancel.h>
DIR *
__fdopendir (int fd)
{
struct stat64 statbuf;
if (__builtin_expect (__fstat64 (fd, &statbuf), 0) < 0)
return NULL;
if (__glibc_unlikely (! S_ISDIR (statbuf.st_mode)))
{
__set_errno (ENOTDIR);
return NULL;
}
/* Make sure the descriptor allows for reading. */
int flags = __fcntl64_nocancel (fd, F_GETFL);
if (__glibc_unlikely (flags == -1))
return NULL;
if (__glibc_unlikely ((flags & O_ACCMODE) == O_WRONLY))
{
__set_errno (EINVAL);
return NULL;
}
return __alloc_dir (fd, false, flags, &statbuf);
}
weak_alias (__fdopendir, fdopendir)
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