file_copy.c

void file_copy(const char * dest, const char* src)
{
	FILE * fsrc = fopen(src,"rb");
	FILE * fdest = fopen(dest,"wb");
	fseek(fsrc,0L,SEEK_END);
	long sz = ftell(fsrc);
	rewind(fsrc);
	unsigned char * buff = (unsigned char *)malloc(sizeof(unsigned char) * sz);
	fread(buff,sz,sizeof(unsigned char),fsrc);
	fwrite(buff,sz,sizeof(unsigned char),fdest);
	free(buff);
	fclose(fsrc);
	fclose(fdest);
}

void file_copy2(const char * dest, const char* src)
{
	FILE * fsrc = fopen(src,"rb");
	FILE * fdest = fopen(dest,"wb");
	rewind(fsrc);
	unsigned char buff[1024];
	size_t sz;
	while((sz = fread(buff,1,1024,fsrc)) > 0 )
	{
		fwrite(buff,1,sz,fdest);
	}
	fclose(fsrc);
	fclose(fdest);
}