1 files changed, 57 insertions, 0 deletions
diff --git a/runtime/graphdriver/devmapper/sys.go b/runtime/graphdriver/devmapper/sys.go
new file mode 100644
index 0000000000..5a9ab4d74b
--- /dev/null
+++ b/runtime/graphdriver/devmapper/sys.go
@@ -0,0 +1,57 @@
+// +build linux,amd64
+
+package devmapper
+
+import (
+	"os"
+	"os/exec"
+	"syscall"
+)
+
+type (
+	sysStatT syscall.Stat_t
+	sysErrno syscall.Errno
+
+	osFile struct{ *os.File }
+)
+
+var (
+	sysMount       = syscall.Mount
+	sysUnmount     = syscall.Unmount
+	sysCloseOnExec = syscall.CloseOnExec
+	sysSyscall     = syscall.Syscall
+
+	osOpenFile = func(name string, flag int, perm os.FileMode) (*osFile, error) {
+		f, err := os.OpenFile(name, flag, perm)
+		return &osFile{File: f}, err
+	}
+	osOpen       = func(name string) (*osFile, error) { f, err := os.Open(name); return &osFile{File: f}, err }
+	osNewFile    = os.NewFile
+	osCreate     = os.Create
+	osStat       = os.Stat
+	osIsNotExist = os.IsNotExist
+	osIsExist    = os.IsExist
+	osMkdirAll   = os.MkdirAll
+	osRemoveAll  = os.RemoveAll
+	osRename     = os.Rename
+	osReadlink   = os.Readlink
+
+	execRun = func(name string, args ...string) error { return exec.Command(name, args...).Run() }
+)
+
+const (
+	sysMsMgcVal = syscall.MS_MGC_VAL
+	sysMsRdOnly = syscall.MS_RDONLY
+	sysEInval   = syscall.EINVAL
+	sysSysIoctl = syscall.SYS_IOCTL
+	sysEBusy    = syscall.EBUSY
+
+	osORdOnly    = os.O_RDONLY
+	osORdWr      = os.O_RDWR
+	osOCreate    = os.O_CREATE
+	osModeDevice = os.ModeDevice
+)
+
+func toSysStatT(i interface{}) *sysStatT {
+	return (*sysStatT)(i.(*syscall.Stat_t))
+}