58 lines
1.6 KiB
C
58 lines
1.6 KiB
C
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
|
|
struct initrd_header
|
|
{
|
|
unsigned char magic; // The magic number is there to check for consistency.
|
|
char name[64];
|
|
unsigned int offset; // Offset in the initrd the file starts.
|
|
unsigned int length; // Length of the file.
|
|
};
|
|
|
|
int main(char argc, char **argv)
|
|
{
|
|
int nheaders = (argc-1)/2;
|
|
struct initrd_header headers[64];
|
|
printf("size of header: %d\n", sizeof(struct initrd_header));
|
|
unsigned int off = sizeof(struct initrd_header) * 64 + sizeof(int);
|
|
int i;
|
|
for(i = 0; i < nheaders; i++)
|
|
{
|
|
printf("writing file %s->%s at 0x%x\n", argv[i*2+1], argv[i*2+2], off);
|
|
strcpy(headers[i].name, argv[i*2+2]);
|
|
headers[i].offset = off;
|
|
FILE *stream = fopen(argv[i*2+1], "r");
|
|
if(stream == 0)
|
|
{
|
|
printf("Error: file not found: %s\n", argv[i*2+1]);
|
|
return 1;
|
|
}
|
|
fseek(stream, 0, SEEK_END);
|
|
headers[i].length = ftell(stream);
|
|
off += headers[i].length;
|
|
fclose(stream);
|
|
headers[i].magic = 0xBF;
|
|
}
|
|
|
|
FILE *wstream = fopen("./initrd.img", "w");
|
|
unsigned char *data = (unsigned char *)malloc(off);
|
|
fwrite(&nheaders, sizeof(int), 1, wstream);
|
|
fwrite(headers, sizeof(struct initrd_header), 64, wstream);
|
|
|
|
for(i = 0; i < nheaders; i++)
|
|
{
|
|
FILE *stream = fopen(argv[i*2+1], "r");
|
|
unsigned char *buf = (unsigned char *)malloc(headers[i].length);
|
|
fread(buf, 1, headers[i].length, stream);
|
|
fwrite(buf, 1, headers[i].length, wstream);
|
|
fclose(stream);
|
|
free(buf);
|
|
}
|
|
|
|
fclose(wstream);
|
|
free(data);
|
|
|
|
return 0;
|
|
}
|