77 lines
2.9 KiB
C
77 lines
2.9 KiB
C
/*
|
|
* mycall.c
|
|
*
|
|
* 05 Jun 93 Terry Lambert Split out of newsyscall.c
|
|
*
|
|
* Copyright (c) 1993 Terrence R. Lambert.
|
|
* 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 Terrence R. Lambert.
|
|
* 4. The name Terrence R. Lambert may not be used to endorse or promote
|
|
* products derived from this software without specific prior written
|
|
* permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY TERRENCE R. LAMBERT ``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 TERRENCE R. LAMBERT 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.
|
|
*
|
|
* $NetBSD: mycall.c,v 1.2 1997/10/13 11:20:41 lukem Exp $
|
|
*/
|
|
#include <sys/param.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/systm.h>
|
|
|
|
|
|
/*
|
|
* This is the actual code for system call... it can be static because
|
|
* we've externed it up above... the only plae it needs to be referenced
|
|
* is the sysent we are interested in.
|
|
*
|
|
* To write your own system call using this as a template, you could strip
|
|
* out this code and use the rest as a prototype module, changing only the
|
|
* function names and the number of arguments to the call in the module
|
|
* specific "sysent".
|
|
*
|
|
* You would have to use the "-R" option of "ld" to ensure a linkable file
|
|
* if you were to do this, since you would need to combine multiple ".o"
|
|
* files into a single ".o" file for use by "modload".
|
|
*/
|
|
int
|
|
mycall( p, uap, retval)
|
|
struct proc *p;
|
|
void *uap;
|
|
int retval[];
|
|
{
|
|
/*
|
|
* Our new system call simply prints a message; it takes no
|
|
* arguments.
|
|
*/
|
|
|
|
printf( "\nI am a loaded system call using the kernel printf!\n");
|
|
printf( "I will print this message each time I am called!\n");
|
|
|
|
return( 0); /* success (or error code from errno.h)*/
|
|
}
|
|
|
|
/*
|
|
* EOF -- This file has not been truncated.
|
|
*/
|