From 909b91a32782d12ac88c4467a390915836feae6d Mon Sep 17 00:00:00 2001
From: "faicker.mo" <faicker.mo@gmail.com>
Date: Fri, 7 Apr 2017 18:35:13 +0800
Subject: [PATCH] Support glibc version<2.14 without setns api(centos6)

---
 src/netns.h  | 15 +++++++++++++++
 src/posix.cc |  1 +
 2 files changed, 16 insertions(+)
 create mode 100644 src/netns.h

diff --git a/src/netns.h b/src/netns.h
new file mode 100644
index 0000000..25d6cdf
--- /dev/null
+++ b/src/netns.h
@@ -0,0 +1,15 @@
+#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 14
+/*  Define setns() if missing from the C library */
+#include <error.h>
+static inline int setns(int fd, int nstype)
+{
+#ifdef __NR_setns
+    return syscall(__NR_setns, fd, nstype);
+#elif defined(__NR_set_ns)
+    return syscall(__NR_set_ns, fd, nstype);
+#else
+    errno = ENOSYS;
+    return -1;
+#endif
+}
+#endif
diff --git a/src/posix.cc b/src/posix.cc
index 974c5f7..fd09d18 100644
--- a/src/posix.cc
+++ b/src/posix.cc
@@ -24,6 +24,7 @@
 #include <sstream>
 
 #include "./exc.h"
+#include "./netns.h"
 
 namespace pyflame {
 int OpenRdonly(const char *path) {