1 files changed, 86 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/util/ProcessUtils.java b/src/main/java/com/google/devtools/build/lib/util/ProcessUtils.java
new file mode 100644
index 0000000000..ec687365ca
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/util/ProcessUtils.java
@@ -0,0 +1,86 @@
+// Copyright 2014 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.devtools.build.lib.util;
+
+import com.google.devtools.build.lib.concurrent.ThreadSafety.ThreadSafe;
+
+/**
+ * OS Process related utilities.
+ *
+ * <p>Default implementation forwards all requests to
+ * {@link com.google.devtools.build.lib.unix.ProcessUtils}. The default implementation
+ * can be overridden by {@code #setImplementation(ProcessUtilsImpl)} method.
+ */
+@ThreadSafe
+public final class ProcessUtils {
+
+  /**
+   * Describes implementation to which all {@code ProcessUtils} requests are
+   * forwarded.
+   */
+  public interface ProcessUtilsImpl {
+    /** @see ProcessUtils#getgid() */
+    int getgid();
+
+    /** @see ProcessUtils#getpid() */
+    int getpid();
+
+    /** @see ProcessUtils#getuid() */
+    int getuid();
+  }
+
+  private volatile static ProcessUtilsImpl implementation = new ProcessUtilsImpl() {
+
+    @Override
+    public int getgid() {
+      return com.google.devtools.build.lib.unix.ProcessUtils.getgid();
+    }
+
+    @Override
+    public int getpid() {
+      return com.google.devtools.build.lib.unix.ProcessUtils.getpid();
+    }
+
+    @Override
+    public int getuid() {
+      return com.google.devtools.build.lib.unix.ProcessUtils.getuid();
+    }
+  };
+
+  private ProcessUtils() {
+    // prevent construction.
+  }
+
+  /**
+   * @return the real group ID of the current process.
+   */
+  public static int getgid() {
+    return implementation.getgid();
+  }
+
+  /**
+   * @return the process ID of this process.
+   */
+  public static int getpid() {
+    return implementation.getpid();
+  }
+
+  /**
+   * @return the real user ID of the current process.
+   */
+  public static int getuid() {
+    return implementation.getuid();
+  }
+}