1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 1987 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include <sys/param.h> 30 #include <dirent.h> 31 32 /* 33 * get next entry in a directory. 34 */ 35 struct dirent * readdir(dirp)36readdir(dirp) 37 register DIR *dirp; 38 { 39 register struct dirent *dp; 40 int saveloc = 0; 41 42 next: 43 if (dirp->dd_size != 0) { 44 dp = (struct dirent *)&dirp->dd_buf[dirp->dd_loc]; 45 saveloc = dirp->dd_loc; /* save for possible EOF */ 46 dirp->dd_loc += dp->d_reclen; 47 } 48 if (dirp->dd_loc >= dirp->dd_size) 49 dirp->dd_loc = dirp->dd_size = 0; 50 51 if (dirp->dd_size == 0 /* refill buffer */ 52 && (dirp->dd_size = getdents(dirp->dd_fd, dirp->dd_buf, dirp->dd_bsize) 53 ) <= 0 54 ) { 55 if (dirp->dd_size == 0) /* This means EOF */ 56 dirp->dd_loc = saveloc; /* EOF so save for telldir */ 57 return (NULL); /* error or EOF */ 58 } 59 60 dp = (struct dirent *)&dirp->dd_buf[dirp->dd_loc]; 61 if (dp->d_reclen <= 0) 62 return (NULL); 63 if (dp->d_fileno == 0) 64 goto next; 65 dirp->dd_off = dp->d_off; 66 return(dp); 67 } 68