1 /* $OpenBSD: fchmod.c,v 1.3 2023/04/08 18:12:08 kn Exp $ */ 2 /* $NetBSD: stat.c,v 1.3 1994/10/26 05:45:07 cgd Exp $ */ 3 4 /*- 5 * Copyright (c) 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)stat.c 8.1 (Berkeley) 6/11/93 33 */ 34 35 #include "stand.h" 36 37 int 38 fchmod(int fd, mode_t m) 39 { 40 struct open_file *f = &files[fd]; 41 42 if (f->f_ops->fchmod == NULL) { 43 errno = EOPNOTSUPP; 44 return (-1); 45 } 46 if ((unsigned)fd >= SOPEN_MAX || f->f_flags == 0) { 47 errno = EBADF; 48 return (-1); 49 } 50 51 /* operation not defined on raw devices */ 52 if (f->f_flags & F_RAW) { 53 errno = EOPNOTSUPP; 54 return (-1); 55 } 56 /* writing is broken or unsupported */ 57 if (f->f_flags & F_NOWRITE) { 58 errno = EOPNOTSUPP; 59 return (-1); 60 } 61 62 if ((errno = (f->f_ops->fchmod)(f, m))) 63 return (-1); 64 return (0); 65 } 66