[libc] Add implementation of POSIX "uname" function.

Reviewed By: lntue

Differential Revision: https://reviews.llvm.org/D134065

2 files changed, 41 insertions, 0 deletions

diff --git a/libc/test/src/sys/utsname/CMakeLists.txt b/libc/test/src/sys/utsname/CMakeLists.txt
new file mode 100644
index 000000000000..a459820c86ea
--- /dev/null
+++ b/libc/test/src/sys/utsname/CMakeLists.txt
@@ -0,0 +1,15 @@
+add_libc_testsuite(libc_sys_utsname_unittests)
+
+add_libc_unittest(
+  uname_test
+  SUITE
+    libc_sys_utsname_unittests
+  SRCS
+    uname_test.cpp
+  DEPENDS
+    libc.include.errno
+    libc.include.sys_utsname
+    libc.src.__support.common
+    libc.src.sys.utsname.uname
+    libc.test.errno_setter_matcher
+)
diff --git a/libc/test/src/sys/utsname/uname_test.cpp b/libc/test/src/sys/utsname/uname_test.cpp
new file mode 100644
index 000000000000..1a1e4a77dae0
--- /dev/null
+++ b/libc/test/src/sys/utsname/uname_test.cpp
@@ -0,0 +1,26 @@
+//===-- Unittests for uname -----------------------------------------------===//
+//
+// 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/__support/CPP/string_view.h"
+#include "src/__support/architectures.h"
+#include "src/sys/utsname/uname.h"
+#include "test/ErrnoSetterMatcher.h"
+#include "utils/UnitTest/Test.h"
+
+#include <errno.h>
+#include <sys/utsname.h>
+
+TEST(LlvmLibcUnameTest, GetMachineName) {
+  struct utsname names;
+  ASSERT_GE(__llvm_libc::uname(&names), 0);
+#ifdef LLVM_LIBC_ARCH_X86_64
+  ASSERT_STREQ(names.machine, "x86_64");
+#elif defined(LLVM_LIBC_ARCH_AARCH64)
+  ASSERT_STREQ(names.machine, "aarch64");
+#endif
+}