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 (c) 1994, 2010, Oracle and/or its affiliates. All rights reserved. 24 */ 25 26 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 27 /* All Rights Reserved */ 28 29 /* 30 * Portions of this source code were derived from Berkeley 4.3 BSD 31 * under license from the Regents of the University of California. 32 */ 33 34 #include <sys/param.h> 35 #include <sys/isa_defs.h> 36 #include <sys/types.h> 37 #include <sys/sysmacros.h> 38 #include <sys/systm.h> 39 #include <sys/errno.h> 40 #include <sys/vnode.h> 41 #include <sys/uio.h> 42 #include <sys/debug.h> 43 #include <sys/file.h> 44 #include <sys/fcntl.h> 45 46 /* 47 * Rename a file relative to a given directory 48 */ 49 int 50 renameat(int fromfd, char *old, int tofd, char *new) 51 { 52 vnode_t *fromvp = NULL; 53 vnode_t *tovp = NULL; 54 file_t *fp; 55 int error; 56 char oldstart; 57 char newstart; 58 59 if (copyin(old, &oldstart, sizeof (char)) || 60 copyin(new, &newstart, sizeof (char))) 61 return (set_errno(EFAULT)); 62 63 if (fromfd == AT_FDCWD || tofd == AT_FDCWD) { 64 proc_t *p = curproc; 65 66 mutex_enter(&p->p_lock); 67 if (fromfd == AT_FDCWD) { 68 fromvp = PTOU(p)->u_cdir; 69 VN_HOLD(fromvp); 70 } 71 if (tofd == AT_FDCWD) { 72 tovp = PTOU(p)->u_cdir; 73 VN_HOLD(tovp); 74 } 75 mutex_exit(&p->p_lock); 76 } 77 78 if (fromvp == NULL && oldstart != '/') { 79 if ((fp = getf(fromfd)) == NULL) { 80 if (tovp != NULL) 81 VN_RELE(tovp); 82 return (set_errno(EBADF)); 83 } 84 fromvp = fp->f_vnode; 85 VN_HOLD(fromvp); 86 releasef(fromfd); 87 } 88 89 if (tovp == NULL && newstart != '/') { 90 if ((fp = getf(tofd)) == NULL) { 91 if (fromvp != NULL) 92 VN_RELE(fromvp); 93 return (set_errno(EBADF)); 94 } 95 tovp = fp->f_vnode; 96 VN_HOLD(tovp); 97 releasef(tofd); 98 } 99 100 error = vn_renameat(fromvp, old, tovp, new, UIO_USERSPACE); 101 102 if (fromvp != NULL) 103 VN_RELE(fromvp); 104 if (tovp != NULL) 105 VN_RELE(tovp); 106 if (error) 107 return (set_errno(error)); 108 return (0); 109 } 110 111 int 112 rename(char *old, char *new) 113 { 114 return (renameat(AT_FDCWD, old, AT_FDCWD, new)); 115 } 116