errors.go

Documentation: github.com/containerd/cgroups

     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 cgroups
    18  
    19  import (
    20  	"errors"
    21  	"os"
    22  )
    23  
    24  var (
    25  	ErrInvalidPid               = errors.New("cgroups: pid must be greater than 0")
    26  	ErrMountPointNotExist       = errors.New("cgroups: cgroup mountpoint does not exist")
    27  	ErrInvalidFormat            = errors.New("cgroups: parsing file with invalid format failed")
    28  	ErrFreezerNotSupported      = errors.New("cgroups: freezer cgroup not supported on this system")
    29  	ErrMemoryNotSupported       = errors.New("cgroups: memory cgroup not supported on this system")
    30  	ErrCgroupDeleted            = errors.New("cgroups: cgroup deleted")
    31  	ErrNoCgroupMountDestination = errors.New("cgroups: cannot find cgroup mount destination")
    32  )
    33  
    34  // ErrorHandler is a function that handles and acts on errors
    35  type ErrorHandler func(err error) error
    36  
    37  // IgnoreNotExist ignores any errors that are for not existing files
    38  func IgnoreNotExist(err error) error {
    39  	if os.IsNotExist(err) {
    40  		return nil
    41  	}
    42  	return err
    43  }
    44  
    45  func errPassthrough(err error) error {
    46  	return err
    47  }
    48
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