github.com/rkt/rkt@v1.30.1-0.20200224141603-171c416fac02/pkg/user/util.go (about)

     1  // Copyright 2016 The rkt Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package user
    16  
    17  import "os"
    18  
    19  // ShiftFiles shifts filesToshift by the amounts specified in uidRange
    20  func ShiftFiles(filesToShift []string, uidRange *UidRange) error {
    21  	if uidRange.Shift != 0 && uidRange.Count != 0 {
    22  		for _, f := range filesToShift {
    23  			if err := os.Chown(f, int(uidRange.Shift), int(uidRange.Shift)); err != nil {
    24  				return err
    25  			}
    26  		}
    27  	}
    28  	return nil
    29  }