github.com/a4a881d4/docker@v1.9.0-rc2/pkg/system/chtimes.go (about)

     1  package system
     2  
     3  import (
     4  	"os"
     5  	"time"
     6  )
     7  
     8  // Chtimes changes the access time and modified time of a file at the given path
     9  func Chtimes(name string, atime time.Time, mtime time.Time) error {
    10  	unixMinTime := time.Unix(0, 0)
    11  	// The max Unix time is 33 bits set
    12  	unixMaxTime := unixMinTime.Add((1<<33 - 1) * time.Second)
    13  
    14  	// If the modified time is prior to the Unix Epoch, or after the
    15  	// end of Unix Time, os.Chtimes has undefined behavior
    16  	// default to Unix Epoch in this case, just in case
    17  
    18  	if atime.Before(unixMinTime) || atime.After(unixMaxTime) {
    19  		atime = unixMinTime
    20  	}
    21  
    22  	if mtime.Before(unixMinTime) || mtime.After(unixMaxTime) {
    23  		mtime = unixMinTime
    24  	}
    25  
    26  	if err := os.Chtimes(name, atime, mtime); err != nil {
    27  		return err
    28  	}
    29  
    30  	return nil
    31  }