/* * Copyright (c) 1982, 1986, 1991, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)subr_xxx.c 8.1 (Berkeley) 6/10/93 * $Id: subr_xxx.c,v 1.4 1995/09/10 21:35:51 bde Exp $ */ /* * Miscellaneous trivial functions. */ #include <sys/param.h> #include <sys/systm.h> /* * Return error for operation not supported * on a specific object or file type. */ int eopnotsupp() { return (EOPNOTSUPP); } /* * Generic null operation, always returns success. */ int nullop() { return (0); } #include <sys/conf.h> /* * Unsupported devswitch functions (e.g. for writing to read-only device). * XXX may belong elsewhere. */ int noopen(dev, flags, fmt, p) dev_t dev; int flags; int fmt; struct proc *p; { return (ENODEV); } int noclose(dev, flags, fmt, p) dev_t dev; int flags; int fmt; struct proc *p; { return (ENODEV); } int noread(dev, uio, ioflag) dev_t dev; struct uio *uio; int ioflag; { return (ENODEV); } int nowrite(dev, uio, ioflag) dev_t dev; struct uio *uio; int ioflag; { return (ENODEV); } int noioctl(dev, cmd, data, flags, p) dev_t dev; int cmd; caddr_t data; int flags; struct proc *p; { return (ENODEV); } void nostop(tp, rw) struct tty *tp; int rw; { } int noreset(dev) dev_t dev; { printf("noreset(0x%x) called\n", dev); return (ENODEV); } struct tty * nodevtotty(dev) dev_t dev; { return (NULL); } int noselect(dev, rw, p) dev_t dev; int rw; struct proc *p; { /* XXX is this distinguished from 1 for data available? */ return (ENODEV); } int nommap(dev, offset, nprot) dev_t dev; int offset; int nprot; { /* Don't return ENODEV. That would allow mapping address ENODEV! */ return (-1); } int nodump(dev) dev_t dev; { return (ENODEV); } /* * Null devswitch functions (for when the operation always succeeds). * XXX may belong elsewhere. * XXX not all are here (e.g., seltrue() isn't). */ /* * XXX this is probably bogus. Any device that uses it isn't checking the * minor number. */ int nullopen(dev, flags, fmt, p) dev_t dev; int flags; int fmt; struct proc *p; { return (0); } int nullclose(dev, flags, fmt, p) dev_t dev; int flags; int fmt; struct proc *p; { return (0); } /* * Unconfigured devswitch functions (for unconfigured drivers). * XXX may belong elsewhere. */ int nxopen(dev, flags, fmt, p) dev_t dev; int flags; int fmt; struct proc *p; { return (ENXIO); } /* * XXX all nx functions except nxopen() should probably go away. They * probably can't be called for non-open devices. */ int nxclose(dev, flags, fmt, p) dev_t dev; int flags; int fmt; struct proc *p; { printf("nxclose(0x%x) called\n", dev); return (ENXIO); } int nxread(dev, uio, ioflag) dev_t dev; struct uio *uio; int ioflag; { printf("nxread(0x%x) called\n", dev); return (ENXIO); } int nxwrite(dev, uio, ioflag) dev_t dev; struct uio *uio; int ioflag; { printf("nxwrite(0x%x) called\n", dev); return (ENXIO); } int nxioctl(dev, cmd, data, flags, p) dev_t dev; int cmd; caddr_t data; int flags; struct proc *p; { printf("nxioctl(0x%x) called\n", dev); return (ENXIO); } int nxselect(dev, rw, p) dev_t dev; int rw; struct proc *p; { printf("nxselect(0x%x) called\n", dev); /* XXX is this distinguished from 1 for data available? */ return (ENXIO); } int nxdump(dev) dev_t dev; { printf("nxdump(0x%x) called\n", dev); return (ENXIO); }