91 lines
2.7 KiB
C
91 lines
2.7 KiB
C
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/* $NetBSD: mdconfig.c,v 1.1.1.1 1995/10/08 22:40:41 gwr Exp $ */
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/*
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* Copyright (c) 1995 Gordon W. Ross
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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* 4. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Gordon W. Ross
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* This program exists for the sole purpose of providing
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* user-space memory for the new RAM-disk driver (rd).
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* The job done by this is similar to mount_mfs.
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* (But this design allows any filesystem format!)
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*/
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#include <fcntl.h>
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#include <stdio.h>
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#include <sys/mman.h>
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#include <sys/param.h>
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#include <dev/ramdisk.h>
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main(argc, argv)
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int argc;
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char **argv;
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{
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struct rd_conf rd;
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int nblks, fd, error;
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if (argc <= 2) {
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fprintf(stderr, "usage: rdconfig <device> <%d-byte-blocks>\n",
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DEV_BSIZE);
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exit(1);
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}
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nblks = atoi(argv[2]);
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if (nblks <= 0) {
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fprintf(stderr, "invalid number of blocks\n");
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exit(1);
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}
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rd.rd_size = nblks << DEV_BSHIFT;
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fd = open(argv[1], O_RDWR, 0);
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if (fd < 0) {
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perror(argv[1]);
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exit(1);
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}
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rd.rd_addr = mmap(NULL, rd.rd_size,
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PROT_READ | PROT_WRITE,
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MAP_ANON | MAP_PRIVATE,
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-1, 0);
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if (rd.rd_addr == (caddr_t)-1) {
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perror("mmap");
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exit(1);
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}
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/* Become server! */
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rd.rd_type = RD_UMEM_SERVER;
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if (ioctl(fd, RD_SETCONF, &rd)) {
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perror("ioctl");
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exit(1);
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}
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exit(0);
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}
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