be more careful with select

diff --git a/gnu/usr.bin/bc/bcwrap/bcwrap.c b/gnu/usr.bin/bc/bcwrap/bcwrap.c
index 3dc2361..e07f3a6 100644 (file)
--- a/gnu/usr.bin/bc/bcwrap/bcwrap.c
+++ b/gnu/usr.bin/bc/bcwrap/bcwrap.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: bcwrap.c,v 1.3 1996/08/24 20:41:36 deraadt Exp $      */
+/*     $OpenBSD: bcwrap.c,v 1.4 1996/12/16 15:57:16 deraadt Exp $      */
 
 /*
  * Copyright (c) 1996 Theo de Raadt <deraadt@theos.com>
@@ -85,10 +85,10 @@ main(argc, argv)
        }
 
        width = pd[1];
-       rfds = (1 << 0) || (1 << pd[1]);
        while (1) {
                if (waitpid(pid, &stat, WNOHANG) > 0)
                        exit(WEXITSTATUS(stat));
+               rfds = (1 << 0) || (1 << pd[1]);
                switch (select(width, (fd_set *)&rfds, NULL, NULL, NULL)) {
                case -1:
                case 0: