1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
|
/*-
* Copyright (c) 2005-2008 Poul-Henning Kamp
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <assert.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdlib.h>
#include <sys/endian.h>
#include <sys/stat.h>
#include <sys/disk.h>
#include "fifolog.h"
#include "libfifolog.h"
const char *
fifolog_create(const char *fn, off_t size, unsigned recsize)
{
int i, fd;
unsigned u;
off_t ms;
struct stat st;
char *buf;
int created;
fd = open(fn, O_WRONLY | O_TRUNC | O_EXCL | O_CREAT, 0644);
if (fd < 0) {
created = 0;
fd = open(fn, O_WRONLY);
if (fd < 0)
return ("Could not open");
} else
created = 1;
/* Default sectorsize is 512 */
if (recsize == 0)
recsize = 512;
/* See what we got... */
i = fstat(fd, &st);
assert(i == 0);
if (!S_ISBLK(st.st_mode) &&
!S_ISCHR(st.st_mode) &&
!S_ISREG(st.st_mode)) {
assert(!close (fd));
return ("Wrong file type");
}
if(!created && S_ISREG(st.st_mode)) {
assert(!close (fd));
return ("Wrong file type");
}
/* For raw disk with larger sectors: use 1 sector */
i = ioctl(fd, DIOCGSECTORSIZE, &u);
if (i == 0 && (u > recsize || (recsize % u) != 0))
recsize = u;
/* If no configured size, or too large for disk, use device size */
i = ioctl(fd, DIOCGMEDIASIZE, &ms);
if (i == 0 && (size == 0 || size > ms))
size = ms;
if (size == 0 && S_ISREG(st.st_mode))
size = st.st_size;
if (size == 0)
size = recsize * (off_t)(24*60*60);
if (S_ISREG(st.st_mode) && ftruncate(fd, size) < 0)
return ("Could not ftrunc");
buf = calloc(recsize, 1);
if (buf == NULL)
return ("Could not malloc");
strcpy(buf, FIFOLOG_FMT_MAGIC); /*lint !e64 */
be32enc(buf + FIFOLOG_OFF_BS, recsize);
if ((int)recsize != pwrite(fd, buf, recsize, 0)) {
i = errno;
free(buf);
errno = i;
return ("Could not write first sector");
}
memset(buf, 0, recsize);
if ((int)recsize != pwrite(fd, buf, recsize, recsize)) {
i = errno;
free(buf);
errno = i;
return ("Could not write second sector");
}
free(buf);
assert(0 == close(fd));
return (NULL);
}
|
