resolv: Tests for various versions of res_init

1 files changed, 38 insertions, 0 deletions

diff --git a/support/support_isolate_in_subprocess.c b/support/support_isolate_in_subprocess.c
new file mode 100644
index 0000000000..cf48614383
--- /dev/null
+++ b/support/support_isolate_in_subprocess.c
@@ -0,0 +1,38 @@
+/* Run a function in a subprocess.
+   Copyright (C) 2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <support/check.h>
+#include <support/xunistd.h>
+
+void
+support_isolate_in_subprocess (void (*callback) (void *), void *closure)
+{
+  pid_t pid = xfork ();
+  if (pid == 0)
+    {
+      /* Child process.  */
+      callback (closure);
+      _exit (0);
+    }
+
+  /* Parent process.  */
+  int status;
+  xwaitpid (pid, &status, 0);
+  if (status != 0)
+    FAIL_EXIT1 ("child process exited with status %d", status);
+}