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 fs 18 19 import "time" 20 21 // Gnu tar and the go tar writer don't have sub-second mtime 22 // precision, which is problematic when we apply changes via tar 23 // files, we handle this by comparing for exact times, *or* same 24 // second count and either a or b having exactly 0 nanoseconds 25 func sameFsTime(a, b time.Time) bool { 26 return a == b || 27 (a.Unix() == b.Unix() && 28 (a.Nanosecond() == 0 || b.Nanosecond() == 0)) 29 } 30