/* * 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); } }