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 (c) 1995, by Sun Microsystems, Inc. 24 * All rights reserved. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include <sys/param.h> 30 #include <sys/stat.h> 31 #include <dirent.h> 32 #include <errno.h> 33 #include <fcntl.h> 34 35 /* 36 * open a directory. 37 */ 38 DIR * 39 opendir(name) 40 char *name; 41 { 42 register DIR *dirp; 43 register int fd; 44 struct stat sb; 45 extern int errno; 46 extern char *malloc(); 47 extern int open(), close(), fstat(); 48 49 if ((fd = open(name, O_RDONLY | O_NDELAY)) == -1) 50 return (NULL); 51 if (fstat(fd, &sb) == -1) { 52 (void) close(fd); 53 return (NULL); 54 } 55 if ((sb.st_mode & S_IFMT) != S_IFDIR) { 56 errno = ENOTDIR; 57 (void) close(fd); 58 return (NULL); 59 } 60 if (((dirp = (DIR *)malloc(sizeof(DIR))) == NULL) || 61 ((dirp->dd_buf = malloc(sb.st_blksize)) == NULL)) { 62 if (dirp) 63 free(dirp); 64 (void) close(fd); 65 return (NULL); 66 } 67 dirp->dd_fd = fd; 68 dirp->dd_loc = 0; 69 dirp->dd_size = 0; 70 dirp->dd_bsize = sb.st_blksize; 71 dirp->dd_off = 0; 72 (void) fcntl(fd, F_SETFD, FD_CLOEXEC); 73 return (dirp); 74 } 75