===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/tmux/file.c,v
retrieving revision 1.6
retrieving revision 1.7
diff -c -r1.6 -r1.7
*** src/usr.bin/tmux/file.c	2020/05/08 14:15:11	1.6
--- src/usr.bin/tmux/file.c	2020/05/26 08:41:47	1.7
***************
*** 1,4 ****
! /* $OpenBSD: file.c,v 1.6 2020/05/08 14:15:11 nicm Exp $ */
  
  /*
   * Copyright (c) 2019 Nicholas Marriott <nicholas.marriott@gmail.com>
--- 1,4 ----
! /* $OpenBSD: file.c,v 1.7 2020/05/26 08:41:47 nicm Exp $ */
  
  /*
   * Copyright (c) 2019 Nicholas Marriott <nicholas.marriott@gmail.com>
***************
*** 242,248 ****
  		cf->path = xstrdup("-");
  
  		fd = STDOUT_FILENO;
! 		if (c == NULL || c->flags & CLIENT_ATTACHED) {
  			cf->error = EBADF;
  			goto done;
  		}
--- 242,250 ----
  		cf->path = xstrdup("-");
  
  		fd = STDOUT_FILENO;
! 		if (c == NULL ||
! 		    (c->flags & CLIENT_ATTACHED) ||
! 		    (c->flags & CLIENT_CONTROL)) {
  			cf->error = EBADF;
  			goto done;
  		}
***************
*** 311,317 ****
  		cf->path = xstrdup("-");
  
  		fd = STDIN_FILENO;
! 		if (c == NULL || c->flags & CLIENT_ATTACHED) {
  			cf->error = EBADF;
  			goto done;
  		}
--- 313,321 ----
  		cf->path = xstrdup("-");
  
  		fd = STDIN_FILENO;
! 		if (c == NULL ||
! 		    (c->flags & CLIENT_ATTACHED) ||
! 		    (c->flags & CLIENT_CONTROL)) {
  			cf->error = EBADF;
  			goto done;
  		}