===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/less/lsystem.c,v
retrieving revision 1.18
retrieving revision 1.19
diff -c -r1.18 -r1.19
*** src/usr.bin/less/lsystem.c	2016/03/16 15:36:26	1.18
--- src/usr.bin/less/lsystem.c	2019/06/28 13:35:01	1.19
***************
*** 74,80 ****
  	 */
  	inp = dup(0);
  	(void) close(0);
! 	if (open("/dev/tty", O_RDONLY) < 0)
  		(void) dup(inp);
  
  	/*
--- 74,80 ----
  	 */
  	inp = dup(0);
  	(void) close(0);
! 	if (open("/dev/tty", O_RDONLY) == -1)
  		(void) dup(inp);
  
  	/*