bbe46b8c43
Signed-off-by: haoyun <yun.hao@daocloud.io> Co-authored-by: zounengren <zouyee1989@gmail.com>
82 lines
1.9 KiB
Go
82 lines
1.9 KiB
Go
//go:build !windows
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// +build !windows
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/*
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Copyright The containerd Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package sys
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import (
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"fmt"
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"net"
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"os"
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"path/filepath"
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"golang.org/x/sys/unix"
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)
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// CreateUnixSocket creates a unix socket and returns the listener
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func CreateUnixSocket(path string) (net.Listener, error) {
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// BSDs have a 104 limit
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if len(path) > 104 {
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return nil, fmt.Errorf("%q: unix socket path too long (> 104)", path)
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}
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if err := os.MkdirAll(filepath.Dir(path), 0660); err != nil {
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return nil, err
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}
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if err := unix.Unlink(path); err != nil && !os.IsNotExist(err) {
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return nil, err
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}
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return net.Listen("unix", path)
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}
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// GetLocalListener returns a listener out of a unix socket.
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func GetLocalListener(path string, uid, gid int) (net.Listener, error) {
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// Ensure parent directory is created
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if err := mkdirAs(filepath.Dir(path), uid, gid); err != nil {
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return nil, err
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}
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l, err := CreateUnixSocket(path)
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if err != nil {
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return l, err
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}
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if err := os.Chmod(path, 0660); err != nil {
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l.Close()
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return nil, err
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}
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if err := os.Chown(path, uid, gid); err != nil {
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l.Close()
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return nil, err
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}
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return l, nil
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}
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func mkdirAs(path string, uid, gid int) error {
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if _, err := os.Stat(path); !os.IsNotExist(err) {
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return err
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}
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if err := os.MkdirAll(path, 0770); err != nil {
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return err
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}
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return os.Chown(path, uid, gid)
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}
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