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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2008 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 /* 30 * fdopendir, dirfd -- C library extension routines 31 * 32 * We use lmalloc()/lfree() rather than malloc()/free() in 33 * order to allow opendir()/readdir()/closedir() to be called 34 * while holding internal libc locks. 35 */ 36 37 #pragma weak _fdopendir = fdopendir 38 39 #include "lint.h" 40 #include <mtlib.h> 41 #include <dirent.h> 42 #include <sys/stat.h> 43 #include <fcntl.h> 44 #include <stdlib.h> 45 #include <unistd.h> 46 #include <errno.h> 47 #include "libc.h" 48 49 DIR * 50 fdopendir(int fd) 51 { 52 private_DIR *pdirp = lmalloc(sizeof (*pdirp)); 53 DIR *dirp = (DIR *)pdirp; 54 void *buf = lmalloc(DIRBUF); 55 int error = 0; 56 struct stat64 sbuf; 57 58 if (pdirp == NULL || buf == NULL) 59 goto fail; 60 /* 61 * POSIX mandated behavior 62 * close on exec if using file descriptor 63 */ 64 if (fcntl(fd, F_SETFD, FD_CLOEXEC) < 0) 65 goto fail; 66 if (fstat64(fd, &sbuf) < 0) 67 goto fail; 68 if ((sbuf.st_mode & S_IFMT) != S_IFDIR) { 69 error = ENOTDIR; 70 goto fail; 71 } 72 dirp->dd_buf = buf; 73 dirp->dd_fd = fd; 74 dirp->dd_loc = 0; 75 dirp->dd_size = 0; 76 (void) mutex_init(&pdirp->dd_lock, USYNC_THREAD, NULL); 77 return (dirp); 78 79 fail: 80 if (pdirp != NULL) 81 lfree(pdirp, sizeof (*pdirp)); 82 if (buf != NULL) 83 lfree(buf, DIRBUF); 84 if (error) 85 errno = error; 86 return (NULL); 87 } 88 89 int 90 dirfd(DIR *dirp) 91 { 92 return (dirp->dd_fd); 93 } 94