2 * Copyright (c) 2000-2001 Silicon Graphics, Inc. All Rights Reserved.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of version 2 of the GNU General Public License as
6 * published by the Free Software Foundation.
8 * This program is distributed in the hope that it would be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12 * Further, this software is distributed without any warranty that it is
13 * free of the rightful claim of any third person regarding infringement
14 * or the like. Any license provided herein, whether implied or
15 * otherwise, applies only to this software file. Patent licenses, if
16 * any, provided herein do not apply to combinations of this program with
17 * other software, or any other product whatsoever.
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write the Free Software Foundation, Inc., 59
21 * Temple Place - Suite 330, Boston MA 02111-1307, USA.
23 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
24 * Mountain View, CA 94043, or:
28 * For further information regarding this notice, see:
30 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
35 * use memory mapping to fill a filesystem! :)
38 #include <sys/types.h>
40 #include <sys/fcntl.h>
47 int fd; /* file descriptor */
48 addr_t ptr; /* mapped pointers */
51 main(int argc, char * argv[])
53 printf("Sizeof junk = %d \n", junk);
56 if ((progname = strrchr(argv[0], '/')) == NULL)
62 fprintf(stderr,"Usage: %s filename\n", progname);
66 fd = open(argv[1], O_RDWR|O_CREAT, 0644);
68 fprintf(stderr,"%s: cannot open %s\n", progname, argv[1]);
73 ptr = mmap(NULL, len, PROT_WRITE, MAP_SHARED|MAP_AUTOGROW , fd, 0);
74 if (ptr == MAP_FAILED) {
75 fprintf(stderr,"%s: cannot mmap %s\n", progname, argv[1]);
81 bcopy(junk, ptr, size_of(junk));
84 printf("%s complete.\n", progname);