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 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 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 #pragma ident "%Z%%M% %I% %E% SMI" 35 36 #include <sys/param.h> 37 #include <sys/isa_defs.h> 38 #include <sys/types.h> 39 #include <sys/sysmacros.h> 40 #include <sys/systm.h> 41 #include <sys/errno.h> 42 #include <sys/vnode.h> 43 #include <sys/uio.h> 44 #include <sys/debug.h> 45 #include <sys/file.h> 46 #include <sys/fcntl.h> 47 #include <c2/audit.h> 48 49 /* 50 * Unlink (i.e. delete) a file. 51 */ 52 int 53 unlink(char *fname) 54 { 55 int error; 56 57 if (error = vn_remove(fname, UIO_USERSPACE, RMFILE)) 58 return (set_errno(error)); 59 return (0); 60 } 61 62 /* 63 * Unlink a file from a directory 64 */ 65 int 66 unlinkat(int fd, char *name, int flags) 67 { 68 file_t *dirfp; 69 vnode_t *dirvp; 70 int error; 71 char startchar; 72 73 if (fd == AT_FDCWD && name == NULL) 74 return (set_errno(EFAULT)); 75 76 if (name != NULL) { 77 if (copyin(name, &startchar, sizeof (char))) 78 return (set_errno(EFAULT)); 79 } else 80 startchar = '\0'; 81 82 if (fd == AT_FDCWD) { 83 dirvp = NULL; 84 } else { 85 if (startchar != '/') { 86 if ((dirfp = getf(fd)) == NULL) { 87 return (set_errno(EBADF)); 88 } 89 dirvp = dirfp->f_vnode; 90 VN_HOLD(dirvp); 91 releasef(fd); 92 } else { 93 dirvp = NULL; 94 } 95 } 96 97 if (audit_active) 98 audit_setfsat_path(1); 99 100 error = vn_removeat(dirvp, name, 101 UIO_USERSPACE, (flags == AT_REMOVEDIR) ? RMDIRECTORY : RMFILE); 102 if (dirvp != NULL) 103 VN_RELE(dirvp); 104 105 if (error != NULL) 106 return (set_errno(error)); 107 return (0); 108 } 109