#include <u.h>
#include <libc.h>

void
usage(void)
{
	fprint(2, "usage: %s n\n", argv0);
	exits("usage");
}

void
main(int argc, char **argv)
{
	int n, m;
	char buf[8192];

	ARGBEGIN {
	default:
		usage();
	} ARGEND

	if(argc != 1)
		usage();
	n = atoi(argv[0]);

	m = 0;
	while(n > 0 && (m = read(0, buf, n < sizeof buf ? n : sizeof buf)) > 0) {
		if(write(1, buf, m) < m)
			sysfatal("write: %r");
		n -= m;
	}
	if(m < 0)
		sysfatal("read: %r");
	if(m < n)
		sysfatal("short");

	exits(nil);
}