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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2001 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 #pragma ident "%Z%%M% %I% %E% SMI" 36 37 #include <sys/param.h> 38 #include <sys/isa_defs.h> 39 #include <sys/types.h> 40 #include <sys/sysmacros.h> 41 #include <sys/systm.h> 42 #include <sys/errno.h> 43 #include <sys/vnode.h> 44 #include <sys/uio.h> 45 #include <sys/debug.h> 46 #include <sys/file.h> 47 #include <sys/fcntl.h> 48 49 /* 50 * Rename or move an existing file. 51 */ 52 int 53 rename(char *from, char *to) 54 { 55 int error; 56 57 if (error = vn_rename(from, to, UIO_USERSPACE)) 58 return (set_errno(error)); 59 return (0); 60 } 61 62 /* 63 * Rename a file relative to a given directory 64 */ 65 int 66 renameat(int fromfd, char *old, int tofd, char *new) 67 { 68 file_t *fromfp; 69 file_t *tofp; 70 vnode_t *fromvp, *tovp; 71 int error; 72 proc_t *p = curproc; 73 char oldstart, newstart; 74 75 tovp = fromvp = NULL; 76 77 if ((fromfd == AT_FDCWD && old == NULL) || 78 (tofd == AT_FDCWD && new == NULL)) 79 return (set_errno(EFAULT)); 80 81 if (fromfd == AT_FDCWD || tofd == AT_FDCWD) { 82 mutex_enter(&p->p_lock); 83 if (fromfd == AT_FDCWD) { 84 fromvp = PTOU(p)->u_cdir; 85 VN_HOLD(fromvp); 86 } 87 if (tofd == AT_FDCWD) { 88 tovp = PTOU(p)->u_cdir; 89 VN_HOLD(tovp); 90 } 91 mutex_exit(&p->p_lock); 92 } 93 94 if (copyin(old, &oldstart, sizeof (char))) 95 return (set_errno(EFAULT)); 96 97 if (copyin(new, &newstart, sizeof (char))) 98 return (set_errno(EFAULT)); 99 100 if (fromvp == NULL) { 101 if (oldstart != '/') { 102 if ((fromfp = getf(fromfd)) == NULL) { 103 if (tovp != NULL) 104 VN_RELE(tovp); 105 return (set_errno(EBADF)); 106 } 107 fromvp = fromfp->f_vnode; 108 VN_HOLD(fromvp); 109 releasef(fromfd); 110 } else { 111 fromvp = NULL; 112 } 113 } 114 115 if (tovp == NULL) { 116 if (newstart != '/') { 117 if ((tofp = getf(tofd)) == NULL) { 118 if (fromvp != NULL) 119 VN_RELE(fromvp); 120 return (set_errno(EBADF)); 121 } 122 tovp = tofp->f_vnode; 123 VN_HOLD(tovp); 124 releasef(tofd); 125 } else { 126 tovp = NULL; 127 } 128 } 129 130 error = vn_renameat(fromvp, old, tovp, new, UIO_USERSPACE); 131 132 if (fromvp != NULL) 133 VN_RELE(fromvp); 134 if (tovp != NULL) 135 VN_RELE(tovp); 136 if (error != 0) 137 return (set_errno(error)); 138 return (error); 139 } 140