[#3351] use execve to silence valgrind on child exit

configure.ac

@@ -1682,6 +1682,8 @@ AC_CONFIG_FILES([src/lib/process/cfgrpt/Makefile])
 AC_CONFIG_FILES([src/lib/process/cfgrpt/tests/Makefile])
 AC_CONFIG_FILES([src/lib/process/tests/Makefile])
 AC_CONFIG_FILES([src/lib/process/testutils/Makefile])
+AC_CONFIG_FILES([src/lib/process/tests/process_test.sh],
+                [chmod +x src/lib/process/tests/process_test.sh])
 AC_CONFIG_FILES([src/lib/stats/Makefile])
 AC_CONFIG_FILES([src/lib/stats/tests/Makefile])
 AC_CONFIG_FILES([src/lib/stats/testutils/Makefile])

src/lib/process/tests/.gitignore

@@ -1 +1,2 @@
 /libprocess_unittests
+/process_test.sh

src/lib/process/tests/Makefile.am

@@ -3,6 +3,7 @@ dhcp_data_dir = @runstatedir@/@PACKAGE@
 AM_CPPFLAGS = -I$(top_builddir)/src/lib -I$(top_srcdir)/src/lib
 AM_CPPFLAGS += $(BOOST_INCLUDES)
 AM_CPPFLAGS += -DTEST_DATA_BUILDDIR=\"$(abs_top_builddir)/src/lib/process/tests\"
+AM_CPPFLAGS += -DTEST_SCRIPT_SH=\"$(abs_top_builddir)/src/lib/process/tests/process_test.sh\"
 AM_CPPFLAGS += -DDATA_DIR="\"$(dhcp_data_dir)\""
 AM_CPPFLAGS += -DINSTALL_PROG=\"$(abs_top_srcdir)/install-sh\"
 

src/lib/process/tests/daemon_unittest.cc

@@ -221,8 +221,11 @@ TEST_F(DaemonTest, createPIDFileOverwrite) {
     ASSERT_GE(pid, 0);
 
     if (pid == 0) {
-        // This is the child, die right away. Tragic, no?
-        _exit (0);
+        char name[] = TEST_SCRIPT_SH;
+        char* argv[] = { name, 0 };
+        char* envp[] = { 0 };
+        execve(name, argv, envp);
+        _exit(0);
     }
 
     // Back in the parent test, we need to wait for the child to die

src/lib/process/tests/process_test.sh.in

@@ -0,0 +1 @@
+#!/bin/sh