$ pstree 60600
-+= 60600 sdk sh -c sterm
 \-+- 74966 sdk /bin/sh /home/sdk/.bin/sterm
   \-+- 68491 sdk st -f Terminus:pixelsize=18
     \-+= 84524 sdk /bin/ksh
       \-+= 46440 sdk vim
         \--= 59475 sdk cscope -dl -f /home/sdk/.dev/cscope.out