uitest: make child soffice process die when parent dies

using PR_SET_PDEATHSIG.

Note that this can only be called by the child process in question, so
we have to pass a new command line argument down to activate it.

And we have to plumb it through the wrapper oosplash process.

I wonder where else our testing infrastructure could benefit from this

Change-Id: I55e8e9f7f4e6cc415046df04c804e51475b8a4c9
Reviewed-on: https://gerrit.libreoffice.org/79854
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

desktop/source/app/cmdlineargs.cxx

@@ -42,6 +42,11 @@
 #include <osl/file.hxx>
 #include <sal/log.hxx>
 
+#ifdef LINUX
+#include <sys/prctl.h>
+#include <signal.h>
+#endif
+
 using namespace com::sun::star::lang;
 using namespace com::sun::star::uri;
 using namespace com::sun::star::uno;
@@ -362,6 +367,15 @@ void CommandLineArgs::ParseCommandLine_Impl( Supplier& supplier )
             {
                 // Do nothing, accept only for backward compatibility
             }
+            else if ( oArg == "dont-survive-parent" )
+            {
+// only supported on linux for now
+#ifdef LINUX
+            prctl(PR_SET_PDEATHSIG, SIGKILL);
+#else
+            fprintf(stderr, "Warning: dont-survive-parent is not supported on this platform (yet).\n");
+#endif
+            }
             else if ( oArg == "nologo" )
             {
                 m_nologo = true;

desktop/source/app/cmdlinehelp.cxx

@@ -112,7 +112,8 @@ namespace desktop
         "Developer arguments:                                                           \n"
         "   --terminate_after_init                                                      \n"
         "                       Exit after initialization complete (no documents loaded)\n"
-        "   --eventtesting      Exit after loading documents.                           \n\n"
+        "   --eventtesting      Exit after loading documents.                           \n"
+        "   --dont-survive-parent Exit when the parent exits (linux only)               \n\n"
         "New document creation arguments:                                               \n"
         "The arguments create an empty document of specified kind. Only one of them may \n"
         "be used in one command line. If filenames are specified after an argument,     \n"

desktop/unx/source/args.c

@@ -9,6 +9,10 @@
 #include <stdlib.h>
 #include <string.h>
 #include <osl/process.h>
+#ifdef LINUX
+#include <sys/prctl.h>
+#include <signal.h>
+#endif
 
 #include "args.h"
 
@@ -121,6 +125,15 @@ Args *args_parse (void)
                     args->pPageinType = pArgDescr[j].pPageinType;
                 break;
             }
+            if (rtl_ustr_ascii_compare_WithLength(
+                    arg, length, "dont-survive-parent")
+                == 0)
+            {
+#ifdef LINUX
+                prctl(PR_SET_PDEATHSIG, SIGKILL);
+#endif
+                break;
+            }
         }
     }
 

uitest/libreoffice/connection.py

@@ -66,7 +66,7 @@ class OfficeConnection:
         argv = [soffice, "--accept=" + socket + ";urp",
                 "-env:UserInstallation=" + userdir,
                 "--quickstart=no", "--nofirststartwizard",
-                "--norestore", "--nologo"]
+                "--norestore", "--nologo", "--dont-survive-parent"]
         if "--valgrind" in self.args:
             argv.append("--valgrind")