* Adjustment: Initial work on moving x86Unix platform code into a more common POSIX platform.

Engine/source/platformPOSIX/POSIXUtils.h

@@ -0,0 +1,90 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) 2012 GarageGames, LLC
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to
+// deal in the Software without restriction, including without limitation the
+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+// sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+// IN THE SOFTWARE.
+//-----------------------------------------------------------------------------
+
+#ifndef _X86UNIXUTILS_H_
+#define _X86UNIXUTILS_H_
+
+struct utsname;
+
+class UnixUtils
+{
+public:
+   UnixUtils();
+   virtual ~UnixUtils();
+
+   /**
+      Returns true if we're running in the background, false otherwise.
+      There's no "standard" way to determine this in unix, but 
+      modern job control unices should support the method described
+      here:
+
+      http://www.faqs.org/faqs/unix-faq/faq/part3/
+
+      (question 3.7)
+    */
+   bool inBackground();
+
+   /**
+      Returns the name of the OS, as reported by uname.
+    */
+   const char* getOSName();
+
+private:
+   struct utsname* mUnameInfo;
+};
+
+extern UnixUtils *UUtils;
+
+// utility class for running a unix command and capturing its output
+class UnixCommandExecutor
+{
+   private:
+      int mRet;
+      int mStdoutSave;
+      int mStderrSave;
+      int mPipeFiledes[2];
+      int mChildPID;
+      int mBytesRead;
+      bool mStdoutClosed;
+      bool mStderrClosed;
+      bool mChildExited;
+
+      void clearFields();
+      void cleanup();
+
+   public:
+      UnixCommandExecutor();
+      ~UnixCommandExecutor();
+
+      // Runs the specified command.  
+      // - args is a null terminated list of the command and its arguments,
+      // e.g: "ps", "-aux", NULL
+      // - stdoutCapture is the buffer where stdout data will be stored
+      // - stdoutCaptureSize is the size of the buffer
+      // None of these parameters may be null.  stdoutCaptureSize must be > 0
+      //
+      // returns -2 if the parameters are bad.  returns -1 if some other
+      // error occurs, check errno for the exact error.
+      int exec(char* args[], char* stdoutCapture, int stdoutCaptureSize);
+};
+
+#endif