89 lines
2.3 KiB
C
89 lines
2.3 KiB
C
/* -*-comment-start: "//";comment-end:""-*-
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* GNU Mes --- Maxwell Equations of Software
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* Copyright (C) 1991,92,93,94,95,96,97,99,2000 Free Software Foundation, Inc.
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* Copyright © 2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
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*
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* This file is part of GNU Mes.
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*
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* GNU Mes is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or (at
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* your option) any later version.
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*
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* GNU Mes is distributed in the hope that it will be useful, but
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* 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
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*/
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// Taken from GNU C Library 2.2.5
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#include <errno.h>
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#include <limits.h>
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#include <stddef.h>
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#include <string.h>
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#include <dirent.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <assert.h>
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#include <dirstream.h>
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int getdents (int filedes, char *buffer, size_t nbytes);
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/* Read a directory entry from DIRP. */
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struct dirent *
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readdir (DIR * dirp)
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{
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struct dirent *dp;
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int save_errno = errno;
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do
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{
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size_t reclen;
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if (dirp->offset >= dirp->size)
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{
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/* We've emptied out our buffer. Refill it. */
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size_t maxread;
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ssize_t bytes;
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maxread = dirp->allocation;
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#if 0
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off_t base;
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bytes = __getdirentries (dirp->fd, dirp->data, maxread, &base);
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#else
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bytes = getdents (dirp->fd, dirp->data, maxread);
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#endif
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if (bytes <= 0)
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{
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/* Don't modifiy errno when reaching EOF. */
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if (bytes == 0)
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errno = save_errno;
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dp = 0;
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break;
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}
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dirp->size = (size_t) bytes;
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/* Reset the offset into the buffer. */
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dirp->offset = 0;
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}
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dp = (struct dirent *) &dirp->data[dirp->offset];
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reclen = dp->d_reclen;
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dirp->offset += reclen;
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dirp->filepos = dp->d_off;
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/* Skip deleted files. */
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}
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while (dp->d_ino == 0);
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return dp;
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}
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