1 files changed, 43 insertions, 0 deletions
diff --git a/chromium/chrome/common/process_singleton_lock_posix.cc b/chromium/chrome/common/process_singleton_lock_posix.cc
new file mode 100644
index 00000000000..9e44b935e01
--- /dev/null
+++ b/chromium/chrome/common/process_singleton_lock_posix.cc
@@ -0,0 +1,43 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/common/process_singleton_lock_posix.h"
+
+#include "base/files/file_util.h"
+#include "base/strings/string_number_conversions.h"
+
+const char kProcessSingletonLockDelimiter = '-';
+
+bool ParseProcessSingletonLock(const base::FilePath& path,
+                               std::string* hostname,
+                               int* pid) {
+  base::FilePath target;
+  if (!base::ReadSymbolicLink(path, &target)) {
+    // The only errno that should occur is ENOENT.
+    if (errno != 0 && errno != ENOENT)
+      PLOG(ERROR) << "readlink(" << path.value() << ") failed";
+  }
+
+  std::string real_path = target.value();
+  if (real_path.empty())
+    return false;
+
+  std::string::size_type pos = real_path.rfind(kProcessSingletonLockDelimiter);
+
+  // If the path is not a symbolic link, or doesn't contain what we expect,
+  // bail.
+  if (pos == std::string::npos) {
+    *hostname = "";
+    *pid = -1;
+    return true;
+  }
+
+  *hostname = real_path.substr(0, pos);
+
+  const std::string& pid_str = real_path.substr(pos + 1);
+  if (!base::StringToInt(pid_str, pid))
+    *pid = -1;
+
+  return true;
+}