readdir.c   [plain text]

/***********************************************************************
*                                                                      *
*               This software is part of the ast package               *
*          Copyright (c) 1985-2007 AT&T Intellectual Property          *
*                      and is licensed under the                       *
*                  Common Public License, Version 1.0                  *
*                    by AT&T Intellectual Property                     *
*                                                                      *
*                A copy of the License is available at                 *
*            http://www.opensource.org/licenses/cpl1.0.txt             *
*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
*                                                                      *
*              Information and Software Systems Research               *
*                            AT&T Research                             *
*                           Florham Park NJ                            *
*                                                                      *
*                 Glenn Fowler <gsf@research.att.com>                  *
*                  David Korn <dgk@research.att.com>                   *
*                   Phong Vo <kpv@research.att.com>                    *
*                                                                      *
***********************************************************************/
#pragma prototyped
/*
 * readdir
 *
 * read from directory stream
 *
 * NOTE: directory entries must fit within DIRBLKSIZ boundaries
 */

#include "dirlib.h"

#if _dir_ok

NoN(readdir)

#else

struct dirent*
readdir(register DIR* dirp)
{
	register struct dirent*	dp;

	for (;;)
	{
		if (dirp->dd_loc >= dirp->dd_size)
		{
			if (dirp->dd_size < 0) return(0);
			dirp->dd_loc = 0;
			if ((dirp->dd_size = getdents(dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
				return(0);
		}
		dp = (struct dirent*)((char*)dirp->dd_buf + dirp->dd_loc);
		if (dp->d_reclen <= 0) return(0);
		dirp->dd_loc += dp->d_reclen;
		if (dp->d_fileno) return(dp);
	}
	/*NOTREACHED*/
}

#endif