grapher: integrate graph events from stdin with the stap process framework.

This was the original way to do graphing and had bitrotted some.

* grapher/StapParser.cxx (initIO): new catchHUP argument
  (ioCallback): Only disconnect signals, etc. on IN_HUP if catchHUP is
  true.
  (errIoCallback): Write error messages to stderr, not stdout.
* grapher/grapher.cxx (StapLauncher::launch): Don't catchHUP on our
  stap process children.
  (ProcWindow::refresh): Display something reasonable for the stap
  "process" that is feeding stdin.
  (main): Use StapParser::initIO to initialize parser reading from
  stdin.

1 files changed, 3 insertions, 2 deletions

diff --git a/grapher/StapParser.hxx b/grapher/StapParser.hxx
index 4dd711e6..24e84fc9 100644
--- a/grapher/StapParser.hxx
+++ b/grapher/StapParser.hxx
@@ -37,12 +37,13 @@ namespace systemtap
     int _errFd;
     int _inFd;
     unsigned char _lineEndChar;
+    bool _catchHUP;
     std::tr1::shared_ptr<StapProcess> _process;
     sigc::connection _ioConnection;
     sigc::connection _errIoConnection;
   public:
     StapParser()
-      :  _errFd(-1), _inFd(-1), _lineEndChar('\n')
+      :  _errFd(-1), _inFd(-1), _lineEndChar('\n'), _catchHUP(false)
     {
     }
     void parseData(std::tr1::shared_ptr<GraphDataBase> gdata,
@@ -65,7 +66,7 @@ namespace systemtap
     {
       _process = process;
     }
-    void initIo(int inFd, int errFd);
+    void initIo(int inFd, int errFd, bool catchHUP);
   };
 
   sigc::signal<void, pid_t>& childDiedSignal();