1 files changed, 75 insertions, 0 deletions
diff --git a/brillo/namespaces/platform.cc b/brillo/namespaces/platform.cc
new file mode 100644
index 0000000..5fe9140
--- /dev/null
+++ b/brillo/namespaces/platform.cc
@@ -0,0 +1,75 @@
+// Copyright 2020 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Contains the implementation of class Platform for libbrillo.
+
+#include "brillo/namespaces/platform.h"
+
+#include <errno.h>
+#include <linux/magic.h>
+#include <stdio.h>
+#include <sys/mount.h>
+#include <sys/stat.h>
+#include <sys/vfs.h>
+#include <sys/wait.h>
+
+#include <memory>
+
+#include <base/files/file_path.h>
+
+using base::FilePath;
+
+namespace brillo {
+
+Platform::Platform() {}
+
+Platform::~Platform() {}
+
+bool Platform::FileSystemIsNsfs(const FilePath& ns_path) {
+  struct statfs buff;
+  if (statfs(ns_path.value().c_str(), &buff) < 0) {
+    PLOG(ERROR) << "Statfs() error for " << ns_path.value();
+    return false;
+  }
+  if ((uint64_t)buff.f_type == NSFS_MAGIC) {
+    return true;
+  }
+  return false;
+}
+
+bool Platform::Unmount(const FilePath& path, bool lazy, bool* was_busy) {
+  int flags = 0;
+  if (lazy) {
+    flags = MNT_DETACH;
+  }
+  if (umount2(path.value().c_str(), flags) != 0) {
+    if (was_busy) {
+      *was_busy = (errno == EBUSY);
+    }
+    return false;
+  }
+  if (was_busy) {
+    *was_busy = false;
+  }
+  return true;
+}
+
+int Platform::Mount(const std::string& source,
+                    const std::string& target,
+                    const std::string& fs_type,
+                    uint64_t mount_flags,
+                    const void* data) {
+  return mount(source.c_str(), target.c_str(), fs_type.c_str(), mount_flags,
+               data);
+}
+
+pid_t Platform::Fork() {
+  return fork();
+}
+
+pid_t Platform::Waitpid(pid_t pid, int* status) {
+  return waitpid(pid, status, 0);
+}
+
+}  // namespace brillo