2 * Copyright (c) 2005-2008 Poul-Henning Kamp
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 #include <sys/endian.h>
41 #include "libfifolog.h"
44 fifolog_create(const char *fn, off_t size, ssize_t recsize)
53 fd = open(fn, O_WRONLY | O_TRUNC | O_EXCL | O_CREAT, 0644);
56 fd = open(fn, O_WRONLY);
58 return ("Could not open");
62 /* Default sectorsize is 512 */
66 /* See what we got... */
69 if (!S_ISBLK(st.st_mode) &&
70 !S_ISCHR(st.st_mode) &&
71 !S_ISREG(st.st_mode)) {
73 return ("Wrong file type");
76 if(!created && S_ISREG(st.st_mode)) {
78 return ("Wrong file type");
81 /* For raw disk with larger sectors: use 1 sector */
82 i = ioctl(fd, DIOCGSECTORSIZE, &u);
83 if (i == 0 && (u > recsize || (recsize % u) != 0))
86 /* If no configured size, or too large for disk, use device size */
87 i = ioctl(fd, DIOCGMEDIASIZE, &ms);
88 if (i == 0 && (size == 0 || size > ms))
91 if (size == 0 && S_ISREG(st.st_mode))
95 size = recsize * (off_t)(24*60*60);
97 if (S_ISREG(st.st_mode) && ftruncate(fd, size) < 0)
98 return ("Could not ftrunc");
100 buf = calloc(1, recsize);
102 return ("Could not malloc");
104 strcpy(buf, FIFOLOG_FMT_MAGIC); /*lint !e64 */
105 be32enc(buf + FIFOLOG_OFF_BS, recsize);
106 if (recsize != pwrite(fd, buf, recsize, 0)) {
110 return ("Could not write first sector");
112 memset(buf, 0, recsize);
113 if ((int)recsize != pwrite(fd, buf, recsize, recsize)) {
117 return ("Could not write second sector");
120 assert(0 == close(fd));