1 files changed, 53 insertions, 0 deletions
diff --git a/newlib/libc/reent/getentropyr.c b/newlib/libc/reent/getentropyr.c
new file mode 100644
index 000000000..e3f85e41b
--- /dev/null
+++ b/newlib/libc/reent/getentropyr.c
@@ -0,0 +1,53 @@
+/* Reentrant version of getentropy system call. */
+
+#include <reent.h>
+#include <unistd.h>
+#include <_syslist.h>
+
+/* Some targets provides their own versions of these functions.  Those
+   targets should define REENTRANT_SYSCALLS_PROVIDED in TARGET_CFLAGS.  */
+
+#ifdef _REENT_ONLY
+#ifndef REENTRANT_SYSCALLS_PROVIDED
+#define REENTRANT_SYSCALLS_PROVIDED
+#endif
+#endif
+
+#ifndef REENTRANT_SYSCALLS_PROVIDED
+
+/* We use the errno variable used by the system dependent layer.  */
+#undef errno
+extern int errno;
+
+/*
+FUNCTION
+	<<_getentropy_r>>---Reentrant version of getentropy
+
+INDEX
+	_getentropy_r
+
+SYNOPSIS
+	#include <reent.h>
+	int _getentropy_r(struct _reent *<[ptr]>,
+		          void *<[buf]>, size_t <[buflen]>);
+
+DESCRIPTION
+	This is a reentrant version of <<getentropy>>.  It
+	takes a pointer to the global data block, which holds
+	<<errno>>.
+*/
+
+int
+_getentropy_r (struct _reent *ptr,
+     void *buf,
+     size_t buflen)
+{
+  int ret;
+
+  errno = 0;
+  if ((ret = _getentropy (buf, buflen)) == -1 && errno != 0)
+    _REENT_ERRNO(ptr) = errno;
+  return ret;
+}
+
+#endif /* ! defined (REENTRANT_SYSCALLS_PROVIDED) */