handle EINTR when reading data from the wakeup pipe

[wxWidgets.git] / src / gtk / utilsgtk.cpp

diff --git a/src/gtk/utilsgtk.cpp b/src/gtk/utilsgtk.cpp
index f557d87d970fc55e224fc780954e1f0b4a1fa0c2..76a2c7fa8c62f7a97eaf76fabd128c7a7ce387e3 100644 (file)
--- a/src/gtk/utilsgtk.cpp
+++ b/src/gtk/utilsgtk.cpp
@@ -119,7 +119,7 @@ void wxDisplaySizeMM( int *width, int *height )
 
 void wxGetMousePosition( int* x, int* y )
 {
-    gdk_window_get_pointer( (GdkWindow*) NULL, x, y, (GdkModifierType*) NULL );
+    gdk_window_get_pointer( NULL, x, y, NULL );
 }
 
 bool wxColourDisplay()
@@ -213,46 +213,18 @@ const gchar *wx_pango_version_check (int major, int minor, int micro)
 extern "C" {
 static
 void GTK_EndProcessDetector(gpointer data, gint source,
-                            GdkInputCondition WXUNUSED(condition) )
+                            GdkInputCondition WXUNUSED(condition))
 {
-   wxEndProcessData *proc_data = (wxEndProcessData *)data;
+    wxEndProcessData * const
+        proc_data = static_cast<wxEndProcessData *>(data);
 
-   // has the process really terminated? unfortunately GDK (or GLib) seem to
-   // generate G_IO_HUP notification even when it simply tries to read from a
-   // closed fd and hasn't terminated at all
-   int pid = (proc_data->pid > 0) ? proc_data->pid : -(proc_data->pid);
-   int status = 0;
-   int rc = waitpid(pid, &status, WNOHANG);
+    // child exited, end waiting
+    close(source);
 
-    if ( rc == 0 )
-    {
-        // This can only happen if the child application closes our dummy
-        // pipe that is used to monitor its lifetime; in that case, our
-        // best bet is to pretend the process did terminate, because
-        // otherwise wxExecute() would hang indefinitely
-        // (OnExceptionWaiting() won't be called again, the descriptor
-        // is closed now).
-        wxLogDebug("Child process (PID %i) still alive, even though notification was received that it terminated.", pid);
-    }
-    else if ( rc == -1 )
-    {
-        // As above, if waitpid() fails, the best we can do is to log the
-        // error and pretend the child terminated:
-        wxLogSysError(_("Failed to check child process' status"));
-    }
-
-   // set exit code to -1 if something bad happened
-   proc_data->exitcode = (rc > 0 && WIFEXITED(status))
-                         ? WEXITSTATUS(status)
-                         : -1;
-
-   // child exited, end waiting
-   close(source);
+    // don't call us again!
+    gdk_input_remove(proc_data->tag);
 
-   // don't call us again!
-   gdk_input_remove(proc_data->tag);
-
-   wxHandleProcessTermination(proc_data);
+    wxHandleProcessTermination(proc_data);
 }
 }
 
@@ -318,7 +290,7 @@ static wxString GetSM()
 
     if ( !smc_conn )
     {
-        wxLogWarning(_("Failed to connect to session manager: %s"), smerr);
+        wxLogDebug("Failed to connect to session manager: %s", smerr);
         return wxEmptyString;
     }
 
@@ -476,7 +448,9 @@ wxString wxGUIAppTraits::GetDesktopEnvironment() const
 
 // see the hack below in wxCmdLineParser::GetUsageString().
 // TODO: replace this hack with a g_option_group_get_entries()
-//       call as soon as such function exists
+//       call as soon as such function exists;
+//       see http://bugzilla.gnome.org/show_bug.cgi?id=431021 for the relative
+//       feature request
 struct _GOptionGroup
 {
   gchar           *name;
@@ -526,36 +500,40 @@ wxGUIAppTraits::GetStandardCmdLineOptions(wxArrayString& names,
     wxString usage;
 
 #ifdef __WXGTK26__
-    // check whether GTK version is greater than 2.6 but also lower than 2.12
-    // because, as we use the undocumented _GOptionGroup struct, we don't want
-    // to run this code with future versions which might change it (2.11 is the
-    // latest one at the time of this writing)
-    if (!gtk_check_version(2,6,0) &&
-        gtk_check_version(2,12,0))
+    if (!gtk_check_version(2,6,0))
     {
-        usage << _("The following standard GTK+ options are also supported:\n");
+        // since GTK>=2.6, we can use the glib_check_version() symbol...
 
-        // passing true here means that the function can open the default
-        // display while parsing (not really used here anyhow)
-        GOptionGroup *gtkOpts = gtk_get_option_group(true);
+        // check whether GLib version is greater than 2.6 but also lower than 2.19
+        // because, as we use the undocumented _GOptionGroup struct, we don't want
+        // to run this code with future versions which might change it (2.19 is the
+        // latest one at the time of this writing)
+        if (!glib_check_version(2,6,0) && glib_check_version(2,19,0))
+        {
+            usage << _("The following standard GTK+ options are also supported:\n");
 
-        // WARNING: here we access the internals of GOptionGroup:
-        GOptionEntry *entries = ((_GOptionGroup*)gtkOpts)->entries;
-        unsigned int n_entries = ((_GOptionGroup*)gtkOpts)->n_entries;
-        wxArrayString namesOptions, descOptions;
+            // passing true here means that the function can open the default
+            // display while parsing (not really used here anyhow)
+            GOptionGroup *gtkOpts = gtk_get_option_group(true);
 
-        for ( size_t n = 0; n < n_entries; n++ )
-        {
-            if ( entries[n].flags & G_OPTION_FLAG_HIDDEN )
-                continue;       // skip
+            // WARNING: here we access the internals of GOptionGroup:
+            GOptionEntry *entries = ((_GOptionGroup*)gtkOpts)->entries;
+            unsigned int n_entries = ((_GOptionGroup*)gtkOpts)->n_entries;
+            wxArrayString namesOptions, descOptions;
 
-            names.push_back(wxGetNameFromGtkOptionEntry(&entries[n]));
+            for ( size_t n = 0; n < n_entries; n++ )
+            {
+                if ( entries[n].flags & G_OPTION_FLAG_HIDDEN )
+                    continue;       // skip
 
-            const gchar * const entryDesc = entries[n].description;
-            desc.push_back(wxString(entryDesc));
-        }
+                names.push_back(wxGetNameFromGtkOptionEntry(&entries[n]));
+
+                const gchar * const entryDesc = entries[n].description;
+                desc.push_back(wxString(entryDesc));
+            }
 
-        g_option_group_free (gtkOpts);
+            g_option_group_free (gtkOpts);
+        }
     }
 #else
     wxUnusedVar(names);