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
|
#include <stdio.h>
#include "sysboot.v"
#include "msdos.v"
#include "skip.v"
char buffer[512];
struct bblist {
char * name;
char * data;
char * desc;
} bblocks[] = {
{ "bare", sysboot_data, "Bare bootblock, lockup if booted" },
{ "dosfs", msdos_data, "Boots file BOOTFILE.SYS from dosfs" },
{ "skip", skip_data, "Bypasses floppy boot with message" },
0
};
char * progname = "";
main(argc, argv)
int argc;
char ** argv;
{
FILE * fd;
struct bblist *ptr = bblocks;
int i;
progname = argv[0];
if( argc != 3 ) Usage();
for(;ptr->name; ptr++) if( strcmp(argv[1], ptr->name) == 0 ) break;
if( ptr->name == 0 ) Usage();
fd = fopen(argv[2], "r+");
if( fd == 0 )
{
fprintf(stderr, "Cannot open %s\n", argv[2]);
exit(1);
}
if( fread(buffer, 512, 1, fd) != 1 )
{
fprintf(stderr, "Cannot read boot block\n");
exit(1);
}
for(i=0; i<sysboot_dosfs_stat; i++)
buffer[i] = ptr->data[i];
for(i=sysboot_codestart; i<512; i++)
buffer[i] = ptr->data[i];
rewind(fd);
if( fwrite(buffer, 512, 1, fd) != 1 )
{
fprintf(stderr, "Cannot write boot block\n");
exit(1);
}
fclose(fd);
}
Usage()
{
struct bblist *ptr = bblocks;
fprintf(stderr, "Usage: %s bootname /dev/fd0\n", progname);
fprintf(stderr, "Blocks\n");
for(;ptr->name; ptr++)
fprintf(stderr, "\t%s\t%s\n", ptr->name, ptr->desc);
exit(1);
}
|
