[libc-commits] [libc] Reland: [libc] implement ioctl ([libc] implement ioctl #85890) (PR #90317)

[Michael Jones via libc-commits]

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@@ -0,0 +1,39 @@
+//===---------- Linux implementation of the POSIX ioctl function --------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/sys/ioctl/ioctl.h"
+
+#include "src/__support/OSUtil/syscall.h" // For internal syscall function.
+#include "src/__support/common.h"
+#include "src/errno/libc_errno.h"
+#include <stdarg.h>
+#include <sys/syscall.h> // For syscall numbers.
+
+namespace LIBC_NAMESPACE {
+
+// This function is currently linux only. It has to be refactored suitably if
+// madvise is to be supported on non-linux operating systems also.
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michaelrj-google wrote:

nit: update comment to refer to the correct function instead of `madvise`.

https://github.com/llvm/llvm-project/pull/90317