/* * Copyright (c) 1983, 1993 * The Regents of the University of California. All rights reserved. * * %sccs.include.redist.c% */ #if defined(LIBC_SCCS) && !defined(lint) static char sccsid[] = "@(#)readdir.c 8.2 (Berkeley) 07/28/94"; #endif /* LIBC_SCCS and not lint */ #include #include /* * get next entry in a directory. */ struct dirent * readdir(dirp) register DIR *dirp; { register struct dirent *dp; for (;;) { if (dirp->dd_loc >= dirp->dd_size) { if (dirp->dd_flags & __DTF_READALL) return (NULL); dirp->dd_loc = 0; } if (dirp->dd_loc == 0 && !(dirp->dd_flags & __DTF_READALL)) { dirp->dd_size = getdirentries(dirp->dd_fd, dirp->dd_buf, dirp->dd_len, &dirp->dd_seek); if (dirp->dd_size <= 0) return (NULL); } 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); } }