- Use an initializer macro to initialize fields in 'fake' FILE objects used

  by *sprintf(), etc.
- Explicitly initialize _fl_mutex to PTHREAD_MUTEX_INITIALIZER for all FILE
  objects.  This is currently a nop on FreeBSD, but is import for other
  platforms (or in the future) where PTHREAD_MUTEX_INITIALIZER is not simply
  zero.

PR:		threads/141198
Reported by:	Jeremy Huddleston @ Apple
MFC after:	2 weeks

1 files changed, 1 insertions, 4 deletions

diff --git a/lib/libc/stdio/vsnprintf.c b/lib/libc/stdio/vsnprintf.c
index f990664..70e4c53 100644
--- a/lib/libc/stdio/vsnprintf.c
+++ b/lib/libc/stdio/vsnprintf.c
@@ -47,7 +47,7 @@ vsnprintf(char * __restrict str, size_t n, const char * __restrict fmt,
 	size_t on;
 	int ret;
 	char dummy[2];
-	FILE f;
+	FILE f = FAKE_FILE;
 
 	on = n;
 	if (n != 0)
@@ -61,12 +61,9 @@ vsnprintf(char * __restrict str, size_t n, const char * __restrict fmt,
 		str = dummy;
 		n = 1;
 	}
-	f._file = -1;
 	f._flags = __SWR | __SSTR;
 	f._bf._base = f._p = (unsigned char *)str;
 	f._bf._size = f._w = n;
-	f._orientation = 0;
-	memset(&f._mbstate, 0, sizeof(mbstate_t));
 	ret = __vfprintf(&f, fmt, ap);
 	if (on > 0)
 		*f._p = '\0';