I want to split output of who command and store output in variable 

EX. 

```
[root@ip ~]# who -m
root_user pts/1        2015-09-16 08:32 (windows-host.net)

```

I want to split this output like

```
var1 = root_user

var2 = 2015-09-16

var3 = 08:32

var4 = windows-host.net (This is hostname)

```