diplodocus.org Git - nmh/blob - sbr/read_yes_or_no_if_tty.c

   1 /*
   2  * read_yes_or_no_if_tty.c -- get a yes/no answer from the user
   3  *
   4  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   5  * COPYRIGHT file in the root directory of the nmh distribution for
   6  * complete copyright information.
   7  */
   8
   9 #include <h/mh.h>
  10
  11
  12 int
  13 read_yes_or_no_if_tty (const char *prompt)
  14 {
  15     static int interactive = -1;
  16
  17     if (interactive < 0)
  18         interactive = isatty (fileno (stdin)) ? 1 : 0;
  19
  20     return (interactive ? read_switch (prompt, anoyes) : 1);
  21 }