[src/trunk]: src/lib/libc/stdio PR/51572: calling funopen on each printw call...

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/27cf796bec1d
branches:  trunk
changeset: 818680:27cf796bec1d
user:      christos <christos%NetBSD.org@localhost>
date:      Sun Oct 23 21:01:52 2016 +0000

description:
PR/51572: calling funopen on each printw call is a tad excessive, but this
is not a reason for funopen to leak. Always call the close function since we
are indirecting through our cookie and we need to free it.

diffstat:

 lib/libc/stdio/funopen.c |  9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)

diffs (37 lines):

diff -r a0a26f128fc2 -r 27cf796bec1d lib/libc/stdio/funopen.c
--- a/lib/libc/stdio/funopen.c  Sun Oct 23 18:51:55 2016 +0000
+++ b/lib/libc/stdio/funopen.c  Sun Oct 23 21:01:52 2016 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: funopen.c,v 1.14 2012/03/28 15:21:11 christos Exp $    */
+/*     $NetBSD: funopen.c,v 1.15 2016/10/23 21:01:52 christos Exp $    */
 
 /*-
  * Copyright (c) 1990, 1993
@@ -37,7 +37,7 @@
 #if 0
 static char sccsid[] = "@(#)funopen.c  8.1 (Berkeley) 6/4/93";
 #else
-__RCSID("$NetBSD: funopen.c,v 1.14 2012/03/28 15:21:11 christos Exp $");
+__RCSID("$NetBSD: funopen.c,v 1.15 2016/10/23 21:01:52 christos Exp $");
 #endif
 #endif /* LIBC_SCCS and not lint */
 
@@ -138,6 +138,8 @@
        void *c = d->cookie;
        int (*cf)(void *) = d->closefn;
        free(dookie);
+       if (cf == NULL)
+               return 0;
        return (*cf)(c);
 }
 
@@ -163,8 +165,7 @@
            d->readfn ? creadfn : NULL,
            d->writefn ? cwritefn : NULL,
            d->seekfn ? cseekfn : NULL,
-           NULL,
-           d->closefn ? cclosefn : NULL);
+           NULL, cclosefn);
        if (fp != NULL)
                return fp;
        free(d);