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 2010 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 /* 31 * Portions of this source code were derived from Berkeley 4.3 BSD 32 * under license from the Regents of the University of California. 33 */ 34 35 #include <sys/param.h> 36 #include <sys/isa_defs.h> 37 #include <sys/types.h> 38 #include <sys/sysmacros.h> 39 #include <sys/systm.h> 40 #include <sys/errno.h> 41 #include <sys/vnode.h> 42 #include <sys/uio.h> 43 #include <sys/debug.h> 44 #include <sys/file.h> 45 #include <sys/fcntl.h> 46 47 /* 48 * Rename a file relative to a given directory 49 */ 50 int 51 renameat(int fromfd, char *old, int tofd, char *new) 52 { 53 file_t *fromfp; 54 file_t *tofp; 55 vnode_t *fromvp, *tovp; 56 int error; 57 proc_t *p = curproc; 58 char oldstart, newstart; 59 60 tovp = fromvp = NULL; 61 62 if ((fromfd == AT_FDCWD && old == NULL) || 63 (tofd == AT_FDCWD && new == NULL)) 64 return (set_errno(EFAULT)); 65 66 if (fromfd == AT_FDCWD || tofd == AT_FDCWD) { 67 mutex_enter(&p->p_lock); 68 if (fromfd == AT_FDCWD) { 69 fromvp = PTOU(p)->u_cdir; 70 VN_HOLD(fromvp); 71 } 72 if (tofd == AT_FDCWD) { 73 tovp = PTOU(p)->u_cdir; 74 VN_HOLD(tovp); 75 } 76 mutex_exit(&p->p_lock); 77 } 78 79 if (copyin(old, &oldstart, sizeof (char))) 80 return (set_errno(EFAULT)); 81 82 if (copyin(new, &newstart, sizeof (char))) 83 return (set_errno(EFAULT)); 84 85 if (fromvp == NULL) { 86 if (oldstart != '/') { 87 if ((fromfp = getf(fromfd)) == NULL) { 88 if (tovp != NULL) 89 VN_RELE(tovp); 90 return (set_errno(EBADF)); 91 } 92 fromvp = fromfp->f_vnode; 93 VN_HOLD(fromvp); 94 releasef(fromfd); 95 } else { 96 fromvp = NULL; 97 } 98 } 99 100 if (tovp == NULL) { 101 if (newstart != '/') { 102 if ((tofp = getf(tofd)) == NULL) { 103 if (fromvp != NULL) 104 VN_RELE(fromvp); 105 return (set_errno(EBADF)); 106 } 107 tovp = tofp->f_vnode; 108 VN_HOLD(tovp); 109 releasef(tofd); 110 } else { 111 tovp = NULL; 112 } 113 } 114 115 error = vn_renameat(fromvp, old, tovp, new, UIO_USERSPACE); 116 117 if (fromvp != NULL) 118 VN_RELE(fromvp); 119 if (tovp != NULL) 120 VN_RELE(tovp); 121 if (error != 0) 122 return (set_errno(error)); 123 return (error); 124 } 125 126 int 127 rename(char *old, char *new) 128 { 129 return (renameat(AT_FDCWD, old, AT_FDCWD, new)); 130 } 131