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45 lines
1.2 KiB
C
45 lines
1.2 KiB
C
/* dirfd.c -- return the file descriptor associated with an open DIR*
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Copyright (C) 2001, 2006, 2008-2024 Free Software Foundation, Inc.
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This file is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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This file 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
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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/* Written by Jim Meyering. */
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#include <config.h>
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#include <dirent.h>
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#include <errno.h>
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#if GNULIB_defined_DIR
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# include "dirent-private.h"
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#endif
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int
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dirfd (DIR *dir_p)
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{
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#if GNULIB_defined_DIR
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int fd = dir_p->fd_to_close;
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if (fd == -1)
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errno = EINVAL;
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return fd;
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#else
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int fd = DIR_TO_FD (dir_p);
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if (fd == -1)
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errno = ENOTSUP;
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return fd;
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#endif
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}
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