ref: de1e5e3e01aaa92979d41a2cf8d33346e5f8d5ce 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; }