builder.c

别人的根据linux0.11改的一个小的操作系统

/*
 * Builder.c
 *
 * Author : Ming Pengli
 * Date :
 *
 * Description: This routine build the biniary system image file .
 *              At here ,we knew the start address at 0x1000,so we 
 *              directly locate the position that we will read. 
 */
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <io.h>
#include <unistd.h>

int main(int argc,char **argv)
{
	FILE *in,*out;
	char ch;
	if(argc!=3){
		printf("Usage:builder src_file dest_file");
		return 0;
	}
	if((in=fopen(argv[1],"rb"))==NULL){                /* Open the .exe file as read and biniary. */
		printf("open input file error...\n");
		return 0;
	}
	fseek(in,0x1000,SEEK_SET);                         /* The _TEXT segment start at 0x1000 */
	if((out=fopen(argv[2],"wb"))==NULL){               /* Create a new .bin file */
		printf("open output file error...\n");
		return 0;
	}
	while(!feof(in)){                                  /* Read from .exe file,and write into .bin file */
		ch=getc(in);
		putc(ch,out);
	}
	fclose(in);
	fclose(out);
	return 0;
}