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

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

void
main(int argc, char *argv[])
{
	char buf[8192];
	long n;
	int b, ms;
	b = 1;
	ms = 10;

	ARGBEGIN {
	case 's':
		ms = atoi(EARGF(usage()));
		break;
	default:
		usage();
	} ARGEND;

	if(b > sizeof buf)
		sysfatal("buffer size %d must be ≤ %d", b, sizeof buf);

	while((n=read(0, buf, b))>0) {
		sleep(ms);
// assert b = n?
		if(write(1, buf, b) != b)
			sysfatal("error writing stdout: %r");
	}
	if(n < 0)
		sysfatal("error reading stdin: %r");

	exits(0);
}