func populateHeaderCtime(h *tar.Header, fi os.FileInfo, _ map[uint64]string) {
st, ok := fi.Sys().(*syscall.Stat_t)
if !ok {
return
}
sec, nsec := st.Ctimespec.Unix()
ctime := time.Unix(sec, nsec)
h.ChangeTime = ctime
}
// fills tar.Header missing information (uid/gid, username/groupname, times ...)
func FillHeader(hdr *tar.Header) {
var cuname string
cuid := os.Getuid()
if curr, err := user.LookupId(fmt.Sprintf("%d", cuid)); err == nil {
cuname = curr.Username
}
if hdr.Uid == 0 {
if hdr.Uname == "" {
hdr.Uid = cuid
hdr.Uname = cuname
} else {
if usr, err := user.Lookup(hdr.Uname); err == nil {
if i, err := fmt.Sscanf("%d", usr.Uid); err == nil {
hdr.Uid = i
hdr.Uname = usr.Username
}
}
}
}
if hdr.Gid == 0 {
if hdr.Gname == "" {
if hdr.Uid != 0 {
if usr, err := user.LookupId(fmt.Sprintf("%d", hdr.Uid)); err == nil {
if i, err := fmt.Sscanf("%d", usr.Gid); err == nil {
hdr.Gid = i
}
}
}
}
}
if hdr.ModTime.IsZero() {
hdr.ModTime = time.Now()
}
if hdr.AccessTime.IsZero() {
hdr.AccessTime = hdr.ModTime
}
if hdr.ChangeTime.IsZero() {
hdr.ChangeTime = hdr.ModTime
}
}