ref: c2a5d7e3f28e86aeef1e4e37e2b88e46af90b62c dir: /sys/src/ape/lib/ap/plan9/ttyname.c/
#include <unistd.h> #include <stdio.h> char * ttyname(int fd) { static char buf[100]; sprintf(buf, "/fd/%d", fd); return buf; }