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-rw-r--r--lib/libc/stdio/clrerr.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/lib/libc/stdio/clrerr.c b/lib/libc/stdio/clrerr.c
index de4526e0a7dc..a597b7b0baf3 100644
--- a/lib/libc/stdio/clrerr.c
+++ b/lib/libc/stdio/clrerr.c
@@ -40,10 +40,20 @@ static char sccsid[] = "@(#)clrerr.c 8.1 (Berkeley) 6/4/93";
#include <stdio.h>
#undef clearerr
+#ifdef _THREAD_SAFE
+#include <pthread.h>
+#include "pthread_private.h"
+#endif
void
clearerr(fp)
FILE *fp;
{
+#ifdef _THREAD_SAFE
+ _thread_flockfile(fp,__FILE__,__LINE__);
+#endif
__sclearerr(fp);
+#ifdef _THREAD_SAFE
+ _thread_funlockfile(fp);
+#endif
}