1 files changed, 14 insertions, 1 deletions

diff --git a/lib/libc/stdio/fgetpos.c b/lib/libc/stdio/fgetpos.c
index 1f4ec1de23d6..4ac0be4ed3e2 100644
--- a/lib/libc/stdio/fgetpos.c
+++ b/lib/libc/stdio/fgetpos.c
@@ -39,10 +39,23 @@ static char sccsid[] = "@(#)fgetpos.c	8.1 (Berkeley) 6/4/93";
 #endif /* LIBC_SCCS and not lint */
 
 #include <stdio.h>
+#ifdef _THREAD_SAFE
+#include <pthread.h>
+#include "pthread_private.h"
+#endif
 
+int
 fgetpos(fp, pos)
 	FILE *fp;
 	fpos_t *pos;
 {
-	return((*pos = ftell(fp)) == (fpos_t)-1);
+	int retval;
+#ifdef _THREAD_SAFE
+	_thread_flockfile(fp,__FILE__,__LINE__);
+#endif
+	retval = (*pos = ftell(fp)) == (fpos_t)-1;
+#ifdef _THREAD_SAFE
+	_thread_funlockfile(fp);
+#endif
+	return(retval);
 }