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) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2015, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
38 #include <sys/types.h>
47 " mmap <file> and cat its content\n";
49 size_t getFilesize(const char *filename)
53 if (stat(filename, &st) == -1) {
61 int main(int argc, char **argv)
69 fprintf(stderr, usage, argv[0]);
73 filesize = getFilesize(argv[1]);
76 fd = open(argv[1], O_RDONLY, 0);
84 mmappedData = mmap(NULL, filesize, PROT_READ,
85 MAP_PRIVATE | MAP_POPULATE, fd, 0);
86 if (mmappedData == MAP_FAILED) {
92 /* Write the mmapped data to stdout (= FD #1) */
93 rc = write(1, mmappedData, filesize);
100 rc = munmap(mmappedData, filesize);