1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
|
package fs
import (
"os"
"golang.org/x/sys/unix"
)
// SetFlags tries to set the O_NOATIME flag on f, which prevents the kernel
// from updating the atime on a read call.
//
// The call fails when we're not the owner of the file or root. The caller
// should ignore the error, which is returned for testing only.
func setFlags(f *os.File) error {
fd := f.Fd()
flags, err := unix.FcntlInt(fd, unix.F_GETFL, 0)
if err == nil {
_, err = unix.FcntlInt(fd, unix.F_SETFL, flags|unix.O_NOATIME)
}
return err
}
|
