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-rw-r--r--lib/libc/stdio/scanf.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/lib/libc/stdio/scanf.c b/lib/libc/stdio/scanf.c
index d36b13a..5faf018 100644
--- a/lib/libc/stdio/scanf.c
+++ b/lib/libc/stdio/scanf.c
@@ -44,10 +44,16 @@ static char sccsid[] = "@(#)scanf.c 8.1 (Berkeley) 6/4/93";
#else
#include <varargs.h>
#endif
+#ifdef _THREAD_SAFE
+#include <pthread.h>
+#include "pthread_private.h"
+#endif
#if __STDC__
+int
scanf(char const *fmt, ...)
#else
+int
scanf(fmt, va_alist)
char *fmt;
va_dcl
@@ -61,7 +67,13 @@ scanf(fmt, va_alist)
#else
va_start(ap);
#endif
+#ifdef _THREAD_SAFE
+ _thread_flockfile(stdin,__FILE__,__LINE__);
+#endif
ret = __svfscanf(stdin, fmt, ap);
va_end(ap);
+#ifdef _THREAD_SAFE
+ _thread_funlockfile(stdin);
+#endif
return (ret);
}
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