| package system |
| |
| import ( |
| "os" |
| "syscall" |
| "time" |
| "unsafe" |
| ) |
| |
| var ( |
| maxTime time.Time |
| ) |
| |
| func init() { |
| if unsafe.Sizeof(syscall.Timespec{}.Nsec) == 8 { |
| // This is a 64 bit timespec |
| // os.Chtimes limits time to the following |
| maxTime = time.Unix(0, 1<<63-1) |
| } else { |
| // This is a 32 bit timespec |
| maxTime = time.Unix(1<<31-1, 0) |
| } |
| } |
| |
| // Chtimes changes the access time and modified time of a file at the given path |
| func Chtimes(name string, atime time.Time, mtime time.Time) error { |
| unixMinTime := time.Unix(0, 0) |
| unixMaxTime := maxTime |
| |
| // If the modified time is prior to the Unix Epoch, or after the |
| // end of Unix Time, os.Chtimes has undefined behavior |
| // default to Unix Epoch in this case, just in case |
| |
| if atime.Before(unixMinTime) || atime.After(unixMaxTime) { |
| atime = unixMinTime |
| } |
| |
| if mtime.Before(unixMinTime) || mtime.After(unixMaxTime) { |
| mtime = unixMinTime |
| } |
| |
| if err := os.Chtimes(name, atime, mtime); err != nil { |
| return err |
| } |
| |
| // Take platform specific action for setting create time. |
| if err := setCTime(name, mtime); err != nil { |
| return err |
| } |
| |
| return nil |
| } |