2 * Copyright (c) 2000 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/
39 main(int argc, char **argv)
43 long long maxblks = -1; /* no limit */
50 int oflags = O_WRONLY;
54 if (strrchr(argv[0],'/'))
55 progname = strrchr(argv[0],'/')+1;
59 while ((fd = getopt(argc, argv, "b:n:o:v:ct")) != EOF) {
62 blksize = atoi(optarg) * 512;
65 maxblks = atoll(optarg);
68 offset = atoll(optarg);
83 if (sts || argc - optind != 1) {
85 "Usage: %s [-b N*512] [-n N] [-o off] [-v val] "
86 " [-c] [-t] <dev/file>\n",
88 fprintf(stderr," -c: create -t: truncate\n");
94 if ((fd = open(path, oflags)) < 0) {
96 "error opening \"%s\": %s\n",
97 path, strerror(errno));
100 if ((lseek64(fd, offset, SEEK_SET)) < 0) {
101 fprintf(stderr, "%s: error seeking to offset %llu "
103 progname, offset, path, strerror(errno));
107 if ((z = memalign(getpagesize(), blksize)) == NULL) {
108 fprintf(stderr, "%s: can't memalign %u bytes: %s\n",
109 progname, blksize, strerror(errno));
112 memset(z, value, blksize);
115 if (nblks++ == maxblks)
117 if ((sts = write(fd, z, blksize)) < blksize) {
118 if (errno == ENOSPC || sts >= 0)
120 fprintf(stderr, "%s: write failed: %s\n",
121 progname, strerror(errno));
125 printf("Wrote %.2fKb (value 0x%x)\n",
126 (double) ((--nblks) * blksize) / 1024, value);