diff options
Diffstat (limited to 'sys/kern/subr_xxx.c')
| -rw-r--r-- | sys/kern/subr_xxx.c | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/sys/kern/subr_xxx.c b/sys/kern/subr_xxx.c new file mode 100644 index 0000000..c9d2676 --- /dev/null +++ b/sys/kern/subr_xxx.c @@ -0,0 +1,182 @@ +/* + * 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(dev_t dev, 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); +} |
