1/*
2   Copyright The containerd Authors.
3
4   Licensed under the Apache License, Version 2.0 (the "License");
5   you may not use this file except in compliance with the License.
6   You may obtain a copy of the License at
7
8       http://www.apache.org/licenses/LICENSE-2.0
9
10   Unless required by applicable law or agreed to in writing, software
11   distributed under the License is distributed on an "AS IS" BASIS,
12   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   See the License for the specific language governing permissions and
14   limitations under the License.
15*/
16
17package sys
18
19import "os"
20
21// IsFifo checks if a file is a (named pipe) fifo
22// if the file does not exist then it returns false
23func IsFifo(path string) (bool, error) {
24	stat, err := os.Stat(path)
25	if err != nil {
26		if os.IsNotExist(err) {
27			return false, nil
28		}
29		return false, err
30	}
31	if stat.Mode()&os.ModeNamedPipe == os.ModeNamedPipe {
32		return true, nil
33	}
34	return false, nil
35}
36