4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
39 static void usage(char *prog)
41 printf("usage: %s [-s] [-b <bytes>] filename\n", prog);
45 int main(int argc, char **argv)
47 bool limit_write = false, do_sync = false;
48 int c, per_write, fd, rc;
49 unsigned long bytes = 0;
53 while ((c = getopt(argc, argv, "sb:")) != -1) {
60 bytes = strtoul(optarg, &endptr, 10);
61 if (endptr != NULL && *endptr != '\0')
70 if (argc - optind != 1)
74 fd = open(argv[optind], O_RDWR | O_CREAT, 0600);
76 printf("Error opening %s\n", argv[1]);
80 /* Even 0 bytes, write at least once */
83 per_write = bytes > 4096 ? 4096 : bytes;
84 rc = write(fd, buf, per_write);
91 return rc >= 0 ? 0 : rc;
95 sprintf(buf, "write %d\n", rc);
96 rc = write(fd, buf, sizeof(buf));