// Execute ChownJob.
func (job *ChownJob) Execute() {
defer job.finalize()
// -1 means not change.
uid := -1
gid := -1
if job.owner != "" {
newUser, err := user.Lookup(job.owner)
if err != nil {
job.setError(err)
return
}
uid, _ = strconv.Atoi(newUser.Uid)
}
if job.group != "" {
cGroupName := C.CString(job.group)
defer C.free(unsafe.Pointer(cGroupName))
group := C.getgrnam(cGroupName)
if group == nil {
job.setError(errors.New("no such a group"))
return
}
gid = int(group.gr_gid)
}
job.setError(os.Chown(job.file.GetPath(), uid, gid))
}
// getGroupId returns the gid for the
// given group, or -1 if it does not
// exists.
func getGroupId(name string) int {
groupMutex.Lock()
defer groupMutex.Unlock()
cname := C.CString(name)
defer C.free(unsafe.Pointer(cname))
group := C.getgrnam(cname)
if group == nil {
return -1
}
return int(group.gr_gid)
}