Plan 9 from Bell Labs’s /usr/web/sources/patch/applied/ape-reentrant/ctermid.c
#include <unistd.h> #include <stdio.h> #include <string.h> char * ctermid(char *s) { static char buf[L_ctermid]; if(s == 0) s = buf; strncpy(s, "/dev/cons", sizeof buf); return(s); } char *ctermid_r(char *s) { return s ? ctermid(s) : NULL; }