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-rw-r--r--newlib/libc/stdio/fdopen.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/newlib/libc/stdio/fdopen.c b/newlib/libc/stdio/fdopen.c
index 0db6062dd..8c1555d34 100644
--- a/newlib/libc/stdio/fdopen.c
+++ b/newlib/libc/stdio/fdopen.c
@@ -76,6 +76,9 @@ _DEFUN (_fdopen_r, (ptr, fd, mode),
if ((fp = __sfp (ptr)) == 0)
return 0;
+
+ _flockfile(fp);
+
fp->_flags = flags;
/*
* If opened for appending, but underlying descriptor
@@ -111,6 +114,7 @@ _DEFUN (_fdopen_r, (ptr, fd, mode),
fp->_flags |= __SCLE;
#endif
+ _funlockfile(fp);
return fp;
}