#include "main.h"

//======================================================================
int main(int argc, char **argv)
{
	char buf[12] = "hello world\n";
	
	if ( argc != 2 ) { printf("usage : ./prog04_file_low_level output_file \n"); return 1; }

	int fd=open(argv[1],O_RDWR);
							if ( fd < 0 ) { perror("open error"); return 1; }

	int ok = write(fd, buf, strlen(buf));
							if ( ok == -1 ) { perror("write error"); return 1; }
	
	close(fd);
	
return 0;
}
//^^^^^^^^^^^^^^^^^^^^^^^^^^ EOF ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^