===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/less/ttyin.c,v
retrieving revision 1.11
retrieving revision 1.12
diff -c -r1.11 -r1.12
*** src/usr.bin/less/ttyin.c	2015/11/09 03:09:19	1.11
--- src/usr.bin/less/ttyin.c	2019/06/28 13:35:01	1.12
***************
*** 32,38 ****
  	 * but also usually lets you read from the keyboard.
  	 */
  	tty = open("/dev/tty", O_RDONLY);
! 	if (tty < 0)
  		tty = STDERR_FILENO;
  }
  
--- 32,38 ----
  	 * but also usually lets you read from the keyboard.
  	 */
  	tty = open("/dev/tty", O_RDONLY);
! 	if (tty == -1)
  		tty = STDERR_FILENO;
  }