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https://github.com/labring/sealos.git
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cuisongliu
40f9941b79
* refactor(master): delete install package * refactor(master): delete args and refactor binary image * refactor(master): add kubeadm runtime apis * refactor(master): add kubeadm runtime apis * refactor(master): fix run logic * refactor(master): fix lint
55 lines
1.8 KiB
Go
55 lines
1.8 KiB
Go
// Copyright © 2021 Alibaba Group Holding Ltd.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// This file is extracted from "github.com/docker/docker/pkg/system"
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package file
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import "golang.org/x/sys/unix"
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// Lgetxattr retrieves the value of the extended attribute identified by attr
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// and associated with the given path in the file system.
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// It will returns a nil slice and nil error if the xattr is not set.
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func Lgetxattr(path string, attr string) ([]byte, error) {
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// Start with a 128 length byte array
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dest := make([]byte, 128)
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sz, errno := unix.Lgetxattr(path, attr, dest)
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switch {
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case errno == unix.ENODATA:
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return nil, nil
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case errno == unix.ERANGE:
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// 128 byte array might just not be good enough. A dummy buffer is used
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// to get the real size of the xattrs on disk
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sz, errno = unix.Lgetxattr(path, attr, []byte{})
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if errno != nil {
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return nil, errno
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}
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dest = make([]byte, sz)
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sz, errno = unix.Lgetxattr(path, attr, dest)
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if errno != nil {
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return nil, errno
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}
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case errno != nil:
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return nil, errno
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}
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return dest[:sz], nil
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}
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// Lsetxattr sets the value of the extended attribute identified by attr
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// and associated with the given path in the file system.
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func Lsetxattr(path string, attr string, data []byte, flags int) error {
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return unix.Lsetxattr(path, attr, data, flags)
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}
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