4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
23 * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
28 * Copyright (c) 2012 by Delphix. All rights reserved.
31 #include "../file_common.h"
32 #include <sys/types.h>
36 #include <linux/falloc.h>
39 * Create a file with assigned size and then free the specified
43 static void usage(char *progname);
48 (void) fprintf(stderr,
49 "usage: %s [-l filesize] [-s start-offset]"
50 "[-n section-len] filename\n", progname);
55 main(int argc, char *argv[])
57 char *filename = NULL;
63 mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
65 while ((ch = getopt(argc, argv, "l:s:n:")) != EOF) {
68 filesize = atoll(optarg);
71 start_off = atoll(optarg);
74 off_len = atoll(optarg);
82 if (optind == argc - 1)
83 filename = argv[optind];
87 if ((fd = open(filename, O_RDWR | O_CREAT | O_TRUNC, mode)) < 0) {
92 buf = (char *)calloc(1, filesize);
98 memset(buf, 'c', filesize);
100 if (write(fd, buf, filesize) < filesize) {
109 #if defined(FALLOC_FL_PUNCH_HOLE) && defined(FALLOC_FL_KEEP_SIZE)
110 if (fallocate(fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,
111 start_off, off_len) < 0) {
116 #else /* !(defined(FALLOC_FL_PUNCH_HOLE) && defined(FALLOC_FL_KEEP_SIZE)) */
118 perror("FALLOC_FL_PUNCH_HOLE unsupported");
122 #endif /* defined(FALLOC_FL_PUNCH_HOLE) && defined(FALLOC_FL_KEEP_SIZE) */