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 /* 28 * fdopendir, dirfd -- C library extension routines 29 * 30 * We use lmalloc()/lfree() rather than malloc()/free() in 31 * order to allow opendir()/readdir()/closedir() to be called 32 * while holding internal libc locks. 33 */ 34 35 #pragma weak _fdopendir = fdopendir 36 37 #include "lint.h" 38 #include <mtlib.h> 39 #include <dirent.h> 40 #include <sys/stat.h> 41 #include <fcntl.h> 42 #include <stdlib.h> 43 #include <unistd.h> 44 #include <errno.h> 45 #include "libc.h" 46 47 DIR * 48 fdopendir(int fd) 49 { 50 private_DIR *pdirp = lmalloc(sizeof (*pdirp)); 51 DIR *dirp = (DIR *)pdirp; 52 void *buf = lmalloc(DIRBUF); 53 int error = 0; 54 struct stat64 sbuf; 55 56 if (pdirp == NULL || buf == NULL) 57 goto fail; 58 /* 59 * POSIX mandated behavior 60 * close on exec if using file descriptor 61 */ 62 if (fcntl(fd, F_SETFD, FD_CLOEXEC) < 0) 63 goto fail; 64 if (fstat64(fd, &sbuf) < 0) 65 goto fail; 66 if ((sbuf.st_mode & S_IFMT) != S_IFDIR) { 67 error = ENOTDIR; 68 goto fail; 69 } 70 dirp->dd_buf = buf; 71 dirp->dd_fd = fd; 72 dirp->dd_loc = 0; 73 dirp->dd_size = 0; 74 (void) mutex_init(&pdirp->dd_lock, USYNC_THREAD, NULL); 75 return (dirp); 76 77 fail: 78 if (pdirp != NULL) 79 lfree(pdirp, sizeof (*pdirp)); 80 if (buf != NULL) 81 lfree(buf, DIRBUF); 82 if (error) 83 errno = error; 84 return (NULL); 85 } 86 87 int 88 dirfd(DIR *dirp) 89 { 90 return (dirp->dd_fd); 91 } 92