diff options
Diffstat (limited to 'vendor/github.com/containerd/continuity/sysx/xattr.go')
-rw-r--r-- | vendor/github.com/containerd/continuity/sysx/xattr.go | 117 |
1 files changed, 0 insertions, 117 deletions
diff --git a/vendor/github.com/containerd/continuity/sysx/xattr.go b/vendor/github.com/containerd/continuity/sysx/xattr.go deleted file mode 100644 index db6fe70fe..000000000 --- a/vendor/github.com/containerd/continuity/sysx/xattr.go +++ /dev/null @@ -1,117 +0,0 @@ -// +build linux darwin - -/* - Copyright The containerd Authors. - - Licensed under the Apache License, Version 2.0 (the "License"); - you may not use this file except in compliance with the License. - You may obtain a copy of the License at - - http://www.apache.org/licenses/LICENSE-2.0 - - Unless required by applicable law or agreed to in writing, software - distributed under the License is distributed on an "AS IS" BASIS, - WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - See the License for the specific language governing permissions and - limitations under the License. -*/ - -package sysx - -import ( - "bytes" - - "golang.org/x/sys/unix" -) - -// Listxattr calls syscall listxattr and reads all content -// and returns a string array -func Listxattr(path string) ([]string, error) { - return listxattrAll(path, unix.Listxattr) -} - -// Removexattr calls syscall removexattr -func Removexattr(path string, attr string) (err error) { - return unix.Removexattr(path, attr) -} - -// Setxattr calls syscall setxattr -func Setxattr(path string, attr string, data []byte, flags int) (err error) { - return unix.Setxattr(path, attr, data, flags) -} - -// Getxattr calls syscall getxattr -func Getxattr(path, attr string) ([]byte, error) { - return getxattrAll(path, attr, unix.Getxattr) -} - -// LListxattr lists xattrs, not following symlinks -func LListxattr(path string) ([]string, error) { - return listxattrAll(path, unix.Llistxattr) -} - -// LRemovexattr removes an xattr, not following symlinks -func LRemovexattr(path string, attr string) (err error) { - return unix.Lremovexattr(path, attr) -} - -// LSetxattr sets an xattr, not following symlinks -func LSetxattr(path string, attr string, data []byte, flags int) (err error) { - return unix.Lsetxattr(path, attr, data, flags) -} - -// LGetxattr gets an xattr, not following symlinks -func LGetxattr(path, attr string) ([]byte, error) { - return getxattrAll(path, attr, unix.Lgetxattr) -} - -const defaultXattrBufferSize = 128 - -type listxattrFunc func(path string, dest []byte) (int, error) - -func listxattrAll(path string, listFunc listxattrFunc) ([]string, error) { - buf := make([]byte, defaultXattrBufferSize) - n, err := listFunc(path, buf) - for err == unix.ERANGE { - // Buffer too small, use zero-sized buffer to get the actual size - n, err = listFunc(path, []byte{}) - if err != nil { - return nil, err - } - buf = make([]byte, n) - n, err = listFunc(path, buf) - } - if err != nil { - return nil, err - } - - ps := bytes.Split(bytes.TrimSuffix(buf[:n], []byte{0}), []byte{0}) - var entries []string - for _, p := range ps { - if len(p) > 0 { - entries = append(entries, string(p)) - } - } - - return entries, nil -} - -type getxattrFunc func(string, string, []byte) (int, error) - -func getxattrAll(path, attr string, getFunc getxattrFunc) ([]byte, error) { - buf := make([]byte, defaultXattrBufferSize) - n, err := getFunc(path, attr, buf) - for err == unix.ERANGE { - // Buffer too small, use zero-sized buffer to get the actual size - n, err = getFunc(path, attr, []byte{}) - if err != nil { - return nil, err - } - buf = make([]byte, n) - n, err = getFunc(path, attr, buf) - } - if err != nil { - return nil, err - } - return buf[:n], nil -} |