Author: sbz (ports committer)
Date: Tue Aug 16 14:15:09 2016
New Revision: 304220
URL: https://svnweb.freebsd.org/changeset/base/304220

Log:
  tty: Use proper definition of exit status code and stdin macro
  
  Reviewed by:  bapt, bdrewery
  Differential Revision:        https://reviews.freebsd.org/D6828

Modified:
  head/usr.bin/tty/tty.c

Modified: head/usr.bin/tty/tty.c
==============================================================================
--- head/usr.bin/tty/tty.c      Tue Aug 16 13:08:03 2016        (r304219)
+++ head/usr.bin/tty/tty.c      Tue Aug 16 14:15:09 2016        (r304220)
@@ -63,17 +63,18 @@ main(int argc, char *argv[])
                case '?':
                default:
                        usage();
+                       /* NOTREACHED */
                }
 
-       t = ttyname(0);
+       t = ttyname(STDIN_FILENO);
        if (!sflag)
                puts(t ? t : "not a tty");
-       exit(t ? 0 : 1);
+       exit(t ? EXIT_SUCCESS : EXIT_FAILURE);
 }
 
 static void
 usage(void)
 {
-       fprintf(stderr, "usage: tty [-s]\n");
+       fprintf(stderr, "usage: %s [-s]\n", getprogname());
        exit(2);
 }
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