github.com/containerd/containerd@v22.0.0-20200918172823-438c87b8e050+incompatible/sys/filesys.go (about)

     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  
    17  package sys
    18  
    19  import "os"
    20  
    21  // IsFifo checks if a file is a (named pipe) fifo
    22  // if the file does not exist then it returns false
    23  func 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  }