X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fstdio%2Ffwide.c;h=48480685aa4b63a664ccc842548aa8f663c9b662;hb=b5a527f9ff47b0f4b32c606e385a0c27d861a475;hp=f4da47f6da8ceca422dee4f6c4b1ad45af045ca5;hpb=0b44a0315b47dd8eced9f3b7f31580cf14bbfc01;p=musl

diff --git a/src/stdio/fwide.c b/src/stdio/fwide.c
index f4da47f6..48480685 100644
--- a/src/stdio/fwide.c
+++ b/src/stdio/fwide.c
@@ -5,6 +5,8 @@
 
 int fwide(FILE *f, int mode)
 {
-	if (!f->mode) f->mode = NORMALIZE(mode);
-	return f->mode;
+	FLOCK(f);
+	if (!f->mode) mode = f->mode = NORMALIZE(mode);
+	FUNLOCK(f);
+	return mode;
 }