nr                 98 usr/bin/cat/cat.c 	int nr, nw, off, wfd;
nr                104 usr/bin/cat/cat.c 	while ((nr = read(rfd, stdbuf, BUFSIZ)) > 0)
nr                105 usr/bin/cat/cat.c 		for (off = 0; nr; nr -= nw, off += nw)
nr                106 usr/bin/cat/cat.c 			if ((nw = write(wfd, stdbuf + off, (size_t)nr)) < 0)
nr                108 usr/bin/cat/cat.c 	if (nr < 0) {