diff --git a/unshare/constants.py b/unshare/constants.py
new file mode 100644
index 0000000000000000000000000000000000000000..58e91000ee73fc6ac7387265a9fd0619371a3df4
--- /dev/null
+++ b/unshare/constants.py
@@ -0,0 +1,53 @@
+MS_MANDLOCK = 64
+MS_NODEV = 4
+CLONE_NEWUTS = 0x04000000
+MS_KERNMOUNT = (1<<22)
+CLONE_NEWNET = 0x40000000
+MS_LAZYTIME = (1<<25)
+CLONE_SIGHAND = 0x00000800
+MS_SHARED = (1<<20)
+MS_NOSEC = (1<<28)
+CLONE_SETTLS = 0x00080000
+MS_ACTIVE = (1<<30)
+CLONE_THREAD = 0x00010000
+MS_REMOUNT = 32
+MS_MGC_MSK = 0xffff0000
+MS_NOEXEC = 8
+MS_NODIRATIME = 2048
+MS_RDONLY = 1
+CLONE_FILES = 0x00000400
+CLONE_NEWNS = 0x00020000
+CLONE_PARENT = 0x00008000
+MS_RELATIME = (1<<21)
+MS_NOSUID = 2
+CLONE_PARENT_SETTID = 0x00100000
+CLONE_CHILD_SETTID = 0x01000000
+MS_SILENT = 32768
+MS_MOVE = 8192
+MS_VERBOSE = 32768
+MS_BORN = (1<<29)
+MS_NOATIME = 1024
+MS_NOUSER = (1<<31)
+MS_UNBINDABLE = (1<<17)
+MS_MGC_VAL = 0xC0ED0000
+MS_REC = 16384
+CLONE_NEWPID = 0x20000000
+CLONE_VFORK = 0x00004000
+CLONE_NEWUSER = 0x10000000
+MS_I_VERSION = (1<<23)
+MS_STRICTATIME = (1<<24)
+CLONE_SYSVSEM = 0x00040000
+CLONE_FS = 0x00000200
+CLONE_IO = 0x80000000
+CLONE_NEWIPC = 0x08000000
+CLONE_UNTRACED = 0x00800000
+CLONE_DETACHED = 0x00400000
+MS_PRIVATE = (1<<18)
+CLONE_VM = 0x00000100
+CLONE_PTRACE = 0x00002000
+CLONE_CHILD_CLEARTID = 0x00200000
+MS_SLAVE = (1<<19)
+MS_DIRSYNC = 128
+MS_BIND = 4096
+MS_SYNCHRONOUS = 16
+MS_POSIXACL = (1<<16)