Support glibc version<2.14 without setns api(centos6)

uber-archive · Jul 13, 2017 · 909b91a · 909b91a
1 parent ff79abe
commit 909b91a
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diff --git a/src/netns.h 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
@@ -24,6 +24,7 @@
 #include <sstream>
 
 #include "./exc.h"
+#include "./netns.h"
 
 namespace pyflame {
 int OpenRdonly(const char *path) {