tty.c - sbase - suckless unix tools
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       ---
       tty.c (409B)
       ---
            1 /* See LICENSE file for copyright and license details. */
            2 #include <stdio.h>
            3 #include <unistd.h>
            4 
            5 #include "util.h"
            6 
            7 static void
            8 usage(void)
            9 {
           10         enprintf(2, "usage: %s\n", argv0);
           11 }
           12 
           13 int
           14 main(int argc, char *argv[])
           15 {
           16         char *tty;
           17 
           18         ARGBEGIN {
           19         default:
           20                 usage();
           21         } ARGEND
           22 
           23         if (argc)
           24                 usage();
           25 
           26         tty = ttyname(STDIN_FILENO);
           27         puts(tty ? tty : "not a tty");
           28 
           29         enfshut(2, stdout, "<stdout>");
           30         return !tty;
           31 }