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, 9 insertions, 8 deletions

diff --git a/grapher/grapher.cxx b/grapher/grapher.cxx
index e3d5289a..6dead221 100644
--- a/grapher/grapher.cxx
+++ b/grapher/grapher.cxx
@@ -293,7 +293,7 @@ int StapLauncher::launch()
   sp->setProcess(proc);
   parsers.push_back(sp);
   parserListChangedSignal().emit();
-  sp->initIo(pipefd[0], pipefd[2]);
+  sp->initIo(pipefd[0], pipefd[2], false);
   return childPid;
 }
 
@@ -422,14 +422,19 @@ void ProcWindow::refresh()
        ++spitr)
     {
       shared_ptr<StapProcess> sp = (*spitr)->getProcess();
+      Gtk::TreeModel::iterator litr = _listStore->append();
+      Gtk::TreeModel::Row row = *litr;
       if (sp)
         {
-          Gtk::TreeModel::iterator litr = _listStore->append();
-          Gtk::TreeModel::Row row = *litr;
           row[_modelColumns._iconName] = sp->pid >= 0 ? "gtk-yes" : "gtk-no";
           row[_modelColumns._scriptName] = sp->script;
           row[_modelColumns._proc] = sp;
         }
+      else
+        {
+          row[_modelColumns._iconName] = "gtk-yes";
+          row[_modelColumns._scriptName] = "standard input";
+        }
     }
 }
 
@@ -615,11 +620,7 @@ int main(int argc, char** argv)
   if (argc == 2 && !std::strcmp(argv[1], "-"))
     {
       tr1::shared_ptr<StapParser> sp = launcher.makeStapParser();
-      sp->setInFd(STDIN_FILENO);
-      Glib::signal_io().connect(sigc::mem_fun(sp.get(),
-                                              &StapParser::ioCallback),
-                                STDIN_FILENO,
-                                Glib::IO_IN | Glib::IO_HUP);
+      sp->initIo(STDIN_FILENO, -1, true);
     }
   else if (argc > 1)
     {