initial code repo

[stor4nfv.git] / src / ceph / src / common / pipe.c

diff --git a/src/ceph/src/common/pipe.c b/src/ceph/src/common/pipe.c
new file mode 100644 (file)
index 0000000..7353cb7
--- /dev/null
+++ b/src/ceph/src/common/pipe.c
@@ -0,0 +1,58 @@
+// -*- 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) 2011 New Dream Network
+ *
+ * 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.
+ *
+ */
+#include "include/compat.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+int pipe_cloexec(int pipefd[2])
+{
+       int ret;
+
+#if defined(HAVE_PIPE2) && defined(O_CLOEXEC)
+       ret = pipe2(pipefd, O_CLOEXEC);
+       if (ret == -1)
+               return -errno;
+       return 0;
+#else
+       ret = pipe(pipefd);
+       if (ret == -1)
+               return -errno;
+
+       /*
+        * The old-fashioned, race-condition prone way that we have to fall
+        * back on if O_CLOEXEC does not exist.
+        */
+       ret = fcntl(pipefd[0], F_SETFD, FD_CLOEXEC);
+       if (ret == -1) {
+               ret = -errno;
+               goto out;
+       }
+
+       ret = fcntl(pipefd[1], F_SETFD, FD_CLOEXEC);
+       if (ret == -1) {
+               ret = -errno;
+               goto out;
+       }
+
+       return 0;
+
+out:
+       VOID_TEMP_FAILURE_RETRY(close(pipefd[0]));
+       VOID_TEMP_FAILURE_RETRY(close(pipefd[1]));
+
+       return ret;
+#endif
+}