1 files changed, 13 insertions, 57 deletions

diff --git a/vendor/github.com/opencontainers/selinux/go-selinux/xattrs.go b/vendor/github.com/opencontainers/selinux/go-selinux/xattrs.go
index 67a9d8ee8..4e711a9f8 100644
--- a/vendor/github.com/opencontainers/selinux/go-selinux/xattrs.go
+++ b/vendor/github.com/opencontainers/selinux/go-selinux/xattrs.go
@@ -3,76 +3,32 @@
 package selinux
 
 import (
-	"syscall"
-	"unsafe"
+	"golang.org/x/sys/unix"
 )
 
-var _zero uintptr
-
 // Returns a []byte slice if the xattr is set and nil otherwise
 // Requires path and its attribute as arguments
 func lgetxattr(path string, attr string) ([]byte, error) {
-	var sz int
-	pathBytes, err := syscall.BytePtrFromString(path)
-	if err != nil {
-		return nil, err
-	}
-	attrBytes, err := syscall.BytePtrFromString(attr)
-	if err != nil {
-		return nil, err
-	}
-
 	// Start with a 128 length byte array
-	sz = 128
-	dest := make([]byte, sz)
-	destBytes := unsafe.Pointer(&dest[0])
-	_sz, _, errno := syscall.Syscall6(syscall.SYS_LGETXATTR, uintptr(unsafe.Pointer(pathBytes)), uintptr(unsafe.Pointer(attrBytes)), uintptr(destBytes), uintptr(len(dest)), 0, 0)
-
-	switch {
-	case errno == syscall.ENODATA:
-		return nil, errno
-	case errno == syscall.ENOTSUP:
-		return nil, errno
-	case errno == syscall.ERANGE:
-		// 128 byte array might just not be good enough,
-		// A dummy buffer is used ``uintptr(0)`` to get real size
-		// of the xattrs on disk
-		_sz, _, errno = syscall.Syscall6(syscall.SYS_LGETXATTR, uintptr(unsafe.Pointer(pathBytes)), uintptr(unsafe.Pointer(attrBytes)), uintptr(unsafe.Pointer(nil)), uintptr(0), 0, 0)
-		sz = int(_sz)
-		if sz < 0 {
+	dest := make([]byte, 128)
+	sz, errno := unix.Lgetxattr(path, attr, dest)
+	if errno == unix.ERANGE {
+		// Buffer too small, get the real size first
+		sz, errno = unix.Lgetxattr(path, attr, []byte{})
+		if errno != nil {
 			return nil, errno
 		}
+
 		dest = make([]byte, sz)
-		destBytes := unsafe.Pointer(&dest[0])
-		_sz, _, errno = syscall.Syscall6(syscall.SYS_LGETXATTR, uintptr(unsafe.Pointer(pathBytes)), uintptr(unsafe.Pointer(attrBytes)), uintptr(destBytes), uintptr(len(dest)), 0, 0)
-		if errno != 0 {
-			return nil, errno
-		}
-	case errno != 0:
+		sz, errno = unix.Lgetxattr(path, attr, dest)
+	}
+	if errno != nil {
 		return nil, errno
 	}
-	sz = int(_sz)
+
 	return dest[:sz], nil
 }
 
 func lsetxattr(path string, attr string, data []byte, flags int) error {
-	pathBytes, err := syscall.BytePtrFromString(path)
-	if err != nil {
-		return err
-	}
-	attrBytes, err := syscall.BytePtrFromString(attr)
-	if err != nil {
-		return err
-	}
-	var dataBytes unsafe.Pointer
-	if len(data) > 0 {
-		dataBytes = unsafe.Pointer(&data[0])
-	} else {
-		dataBytes = unsafe.Pointer(&_zero)
-	}
-	_, _, errno := syscall.Syscall6(syscall.SYS_LSETXATTR, uintptr(unsafe.Pointer(pathBytes)), uintptr(unsafe.Pointer(attrBytes)), uintptr(dataBytes), uintptr(len(data)), uintptr(flags), 0)
-	if errno != 0 {
-		return errno
-	}
-	return nil
+	return unix.Lsetxattr(path, attr, data, flags)
 }