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905ae44c77
This generic implementation already expects a getdents API which is Linux specific. It also allows simplify it by assuming _DIRENT_HAVE_D_RECLEN and _DIRENT_HAVE_D_OFF support. The readdir are also expanded on each required implementation, futher fixes and improvements will make parametrize the implementation more complex. Checked on x86_64-linux-gnu, i686-linux-gnu, and with a build for all affected ABIs.
53 lines
1.5 KiB
C
53 lines
1.5 KiB
C
/* Copyright (C) 2005-2020 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 <dirent.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stddef.h>
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#include <sys/stat.h>
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#include <not-cancel.h>
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DIR *
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__fdopendir (int fd)
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{
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struct stat64 statbuf;
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if (__builtin_expect (__fstat64 (fd, &statbuf), 0) < 0)
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return NULL;
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if (__glibc_unlikely (! S_ISDIR (statbuf.st_mode)))
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{
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__set_errno (ENOTDIR);
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return NULL;
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}
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/* Make sure the descriptor allows for reading. */
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int flags = __fcntl64_nocancel (fd, F_GETFL);
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if (__glibc_unlikely (flags == -1))
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return NULL;
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if (__glibc_unlikely ((flags & O_ACCMODE) == O_WRONLY))
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{
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__set_errno (EINVAL);
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return NULL;
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}
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return __alloc_dir (fd, false, flags, &statbuf);
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}
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weak_alias (__fdopendir, fdopendir)
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