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 #include <c2/audit.h> 49 50 /* 51 * Unlink (i.e. delete) a file. 52 */ 53 int 54 unlink(char *fname) 55 { 56 int error; 57 58 if (error = vn_remove(fname, UIO_USERSPACE, RMFILE)) 59 return (set_errno(error)); 60 return (0); 61 } 62 63 /* 64 * Unlink a file from a directory 65 */ 66 int 67 unlinkat(int fd, char *name, int flags) 68 { 69 file_t *dirfp; 70 vnode_t *dirvp; 71 int error; 72 char startchar; 73 74 if (fd == AT_FDCWD && name == NULL) 75 return (set_errno(EFAULT)); 76 77 if (name != NULL) { 78 if (copyin(name, &startchar, sizeof (char))) 79 return (set_errno(EFAULT)); 80 } else 81 startchar = '\0'; 82 83 if (fd == AT_FDCWD) { 84 dirvp = NULL; 85 } else { 86 if (startchar != '/') { 87 if ((dirfp = getf(fd)) == NULL) { 88 return (set_errno(EBADF)); 89 } 90 dirvp = dirfp->f_vnode; 91 VN_HOLD(dirvp); 92 releasef(fd); 93 } else { 94 dirvp = NULL; 95 } 96 } 97 98 #ifdef C2_AUDIT 99 if (audit_active) 100 audit_setfsat_path(1); 101 #endif /* C2_AUDIT */ 102 103 error = vn_removeat(dirvp, name, 104 UIO_USERSPACE, (flags == AT_REMOVEDIR) ? RMDIRECTORY : RMFILE); 105 if (dirvp != NULL) 106 VN_RELE(dirvp); 107 108 if (error != NULL) 109 return (set_errno(error)); 110 return (0); 111 } 112