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
|
/*
* geninitrdsz.c
* Generate initrd.size file for zSeries platforms.
* Takes an integer argument and writes out the binary representation of
* that value to the initrd.size file.
* https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=197773
*
* Copyright (C) 2007 Red Hat, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <netinet/in.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
int main(int argc,char **argv) {
unsigned int zero = 0;
int fd;
unsigned int size;
mode_t mode = S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH;
if (argc != 3) {
printf("Usage: %s [integer size] [output file]\n", basename(argv[0]));
printf("Example: %s 12288475 initrd.size\n", basename(argv[0]));
return 0;
}
size = htonl(atoi(argv[1]));
fd = open(argv[2], O_CREAT | O_RDWR, mode);
if (write(fd, &zero, sizeof(int)) == -1) {
perror("writing initrd.size (zero)");
return errno;
}
if (write(fd, &size, sizeof(int)) == -1) {
perror("writing initrd.size (size)");
return errno;
}
close(fd);
return 0;
}
|
