Adding upstream version 14.2.21.upstream/14.2.21upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 56 insertions, 0 deletions

diff --git a/src/dmclock/test/dmcPrCtl.h b/src/dmclock/test/dmcPrCtl.h
new file mode 100644
index 00000000..e0b2216f
--- /dev/null
+++ b/src/dmclock/test/dmcPrCtl.h
@@ -0,0 +1,56 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2017 Red Hat Inc.
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation.  See file COPYING.
+ *
+ */
+
+// essentially the same as ceph's PrCtl.h, copied into the dmclock library
+
+#ifdef HAVE_SYS_PRCTL_H
+#include <iostream>
+#include <sys/prctl.h>
+#include <errno.h>
+
+struct PrCtl {
+  int saved_state = -1;
+  int set_dumpable(int new_state) {
+    int r = prctl(PR_SET_DUMPABLE, new_state);
+    if (r) {
+      r = -errno;
+      std::cerr << "warning: unable to " << (new_state ? "set" : "unset")
+                << " dumpable flag: " << strerror(r)
+                << std::endl;
+    }
+    return r;
+  }
+  PrCtl(int new_state = 0) {
+    int r = prctl(PR_GET_DUMPABLE);
+    if (r == -1) {
+      r = errno;
+      std::cerr << "warning: unable to get dumpable flag: " << strerror(r)
+                << std::endl;
+    } else if (r != new_state) {
+      if (!set_dumpable(new_state)) {
+        saved_state = r;
+      }
+    }
+  }
+  ~PrCtl() {
+    if (saved_state < 0) {
+      return;
+    }
+    set_dumpable(saved_state);
+  }
+};
+#else
+struct PrCtl {};
+#endif