Don't call sysconf() in a loop conditional when the loop won't affect it

ok natano@ tedu@

diff --git a/bin/csh/misc.c b/bin/csh/misc.c
index 3a3ab32..d62b23d 100644 (file)
--- a/bin/csh/misc.c
+++ b/bin/csh/misc.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: misc.c,v 1.18 2015/12/26 13:48:38 mestre Exp $        */
+/*     $OpenBSD: misc.c,v 1.19 2016/08/14 19:45:24 guenther Exp $      */
 /*     $NetBSD: misc.c,v 1.6 1995/03/21 09:03:09 cgd Exp $     */
 
 /*-
@@ -170,8 +170,9 @@ void
 closem(void)
 {
     int f;
+    int max = sysconf(_SC_OPEN_MAX);
 
-    for (f = 0; f < sysconf(_SC_OPEN_MAX); f++)
+    for (f = 0; f < max; f++)
        if (f != SHIN && f != SHOUT && f != SHERR && f != OLDSTD &&
            f != FSHTTY)
            (void) close(f);