| /* |
| * Copyright (c) 1983 Regents of the University of California. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. All advertising materials mentioning features or use of this software |
| * must display the following acknowledgement: |
| * This product includes software developed by the University of |
| * California, Berkeley and its contributors. |
| * 4. Neither the name of the University nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| |
| #if defined(LIBC_SCCS) && !defined(lint) |
| static char sccsid[] = "@(#)readdir.c 5.7 (Berkeley) 6/1/90"; |
| #endif /* LIBC_SCCS and not lint */ |
| |
| #include <dirent.h> |
| |
| /* |
| * get next entry in a directory. |
| */ |
| struct dirent * |
| readdir(dirp) |
| register DIR *dirp; { |
| register struct dirent *dp; |
| |
| for (;;) { |
| if (dirp->dd_loc == 0) { |
| dirp->dd_size = _getdents (dirp->dd_fd, |
| dirp->dd_buf, |
| dirp->dd_len); |
| |
| if (dirp->dd_size <= 0) |
| return NULL; |
| } |
| if (dirp->dd_loc >= dirp->dd_size) { |
| dirp->dd_loc = 0; |
| continue; |
| } |
| dp = (struct dirent *)(dirp->dd_buf + dirp->dd_loc); |
| if ((int)dp & 03) /* bogus pointer check */ |
| return NULL; |
| if (dp->d_reclen <= 0 || |
| dp->d_reclen > dirp->dd_len + 1 - dirp->dd_loc) |
| return NULL; |
| dirp->dd_loc += dp->d_reclen; |
| if (dp->d_ino == 0) |
| continue; |
| return (dp); |
| } |
| } |