nw                 98 usr/bin/cat/cat.c 	int nr, nw, off, wfd;
nw                105 usr/bin/cat/cat.c 		for (off = 0; nr; nr -= nw, off += nw)
nw                106 usr/bin/cat/cat.c 			if ((nw = write(wfd, stdbuf + off, (size_t)nr)) < 0)