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 #include <c2/audit.h> 46 47 /* 48 * Unlink a file from a directory 49 */ 50 int 51 unlinkat(int fd, char *name, int flags) 52 { 53 file_t *dirfp; 54 vnode_t *dirvp; 55 int error; 56 char startchar; 57 58 if (fd == AT_FDCWD && name == NULL) 59 return (set_errno(EFAULT)); 60 61 if (name != NULL) { 62 if (copyin(name, &startchar, sizeof (char))) 63 return (set_errno(EFAULT)); 64 } else 65 startchar = '\0'; 66 67 if (fd == AT_FDCWD) { 68 dirvp = NULL; 69 } else { 70 if (startchar != '/') { 71 if ((dirfp = getf(fd)) == NULL) { 72 return (set_errno(EBADF)); 73 } 74 dirvp = dirfp->f_vnode; 75 VN_HOLD(dirvp); 76 releasef(fd); 77 } else { 78 dirvp = NULL; 79 } 80 } 81 82 if (AU_AUDITING() && (dirvp != NULL)) 83 audit_setfsat_path(1); 84 85 error = vn_removeat(dirvp, name, 86 UIO_USERSPACE, (flags == AT_REMOVEDIR) ? RMDIRECTORY : RMFILE); 87 if (dirvp != NULL) 88 VN_RELE(dirvp); 89 90 if (error != NULL) 91 return (set_errno(error)); 92 return (0); 93 } 94 95 int 96 unlink(char *name) 97 { 98 return (unlinkat(AT_FDCWD, name, 0)); 99 } 100 101 int 102 rmdir(char *name) 103 { 104 return (unlinkat(AT_FDCWD, name, AT_REMOVEDIR)); 105 } 106