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Languguage OS II Version 10-94 (Knowledge Media)(1994).ISO
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readdir.c
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C/C++ Source or Header
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1993-12-20
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2KB
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66 lines
/* Copyright (C) 1991, 1992, 1993 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <ansidecl.h>
#include <errno.h>
#include <limits.h>
#include <stddef.h>
#include <string.h>
#include <dirent.h>
#include <unistd.h>
#include <sys/types.h>
/* Read a directory entry from DIRP. */
struct dirent *
DEFUN(readdir, (dirp), DIR *dirp)
{
struct dirent *dp;
if (dirp == NULL || dirp->__data == NULL)
{
errno = EINVAL;
return NULL;
}
do
{
if (dirp->__offset >= dirp->__size)
{
/* We've emptied out our buffer. Refill it. */
off_t base;
ssize_t bytes = __getdirentries (dirp->__fd, dirp->__data,
dirp->__allocation, &base);
if (bytes <= 0)
return NULL;
dirp->__size = (size_t) bytes;
/* Reset the offset into the buffer. */
dirp->__offset = 0;
}
dp = (struct dirent *) &dirp->__data[dirp->__offset];
dirp->__offset += dp->d_reclen;
/* Loop to ignore deleted files. */
} while (dp->d_fileno == 0);
return dp;
}