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 2007 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 #pragma weak dirfd = _dirfd 39 40 #include "synonyms.h" 41 #include <mtlib.h> 42 #include <dirent.h> 43 #include <sys/stat.h> 44 #include <fcntl.h> 45 #include <stdlib.h> 46 #include <unistd.h> 47 #include <errno.h> 48 #include "libc.h" 49 50 extern int __fcntl(int fd, int cmd, intptr_t arg); 51 52 DIR * 53 fdopendir(int fd) 54 { 55 private_DIR *pdirp = lmalloc(sizeof (*pdirp)); 56 DIR *dirp = (DIR *)pdirp; 57 void *buf = lmalloc(DIRBUF); 58 int error = 0; 59 struct stat64 sbuf; 60 61 if (pdirp == NULL || buf == NULL) 62 goto fail; 63 /* 64 * POSIX mandated behavior 65 * close on exec if using file descriptor 66 */ 67 if (__fcntl(fd, F_SETFD, FD_CLOEXEC) < 0) 68 goto fail; 69 if (fstat64(fd, &sbuf) < 0) 70 goto fail; 71 if ((sbuf.st_mode & S_IFMT) != S_IFDIR) { 72 error = ENOTDIR; 73 goto fail; 74 } 75 dirp->dd_buf = buf; 76 dirp->dd_fd = fd; 77 dirp->dd_loc = 0; 78 dirp->dd_size = 0; 79 (void) mutex_init(&pdirp->dd_lock, USYNC_THREAD, NULL); 80 return (dirp); 81 82 fail: 83 if (pdirp != NULL) 84 lfree(pdirp, sizeof (*pdirp)); 85 if (buf != NULL) 86 lfree(buf, DIRBUF); 87 if (error) 88 errno = error; 89 return (NULL); 90 } 91 92 int 93 dirfd(DIR *dirp) 94 { 95 return (dirp->dd_fd); 96 } 97