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/*
* 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
* $FreeBSD$
*/
/*
* 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, td)
dev_t dev;
int flags;
int fmt;
struct thread *td;
{
return (ENODEV);
}
int
noclose(dev, flags, fmt, td)
dev_t dev;
int flags;
int fmt;
struct thread *td;
{
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, td)
dev_t dev;
u_long cmd;
caddr_t data;
int flags;
struct thread *td;
{
return (ENODEV);
}
int
nokqfilter(dev, kn)
dev_t dev;
struct knote *kn;
{
return (ENODEV);
}
int
nommap(dev, offset, nprot)
dev_t dev;
vm_offset_t offset;
int nprot;
{
/* Don't return ENODEV. That would allow mapping address ENODEV! */
return (-1);
}
int
nodump(void *arg, void *virtual __unused, vm_offset_t physical __unused, off_t offset __unused, size_t length __unused)
{
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, td)
dev_t dev;
int flags;
int fmt;
struct thread *td;
{
return (0);
}
int
nullclose(dev, flags, fmt, td)
dev_t dev;
int flags;
int fmt;
struct thread *td;
{
return (0);
}
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