sudo command listed in ps and pstree output

Issue

• On RHEL 5.6 with sudo-1.7.2p1-10.el5 (and earlier), the pstree only shows the command being run by sudo:

  [root@localhost ~]# sudo -u ralph sleep 3 & sleep 1; pstree -paul $!
  [1] 1829
  sleep,1829,ralph 3
  

• But on RHEL 5.8 with sudo-1.7.2p1-13.el5 (and newer) the sudo process also shows up in the pstree:

  [root@localhost ~]# sudo -u ralph sleep 3 & sleep 1; pstree -paul $!
  [1] 24005
  sudo,24005 -u ralph sleep 3
    └─sleep,24007,ralph 3
  

• Likewise, on RHEL 6.0 with sudo-1.7.2p2-9.el6:

  [root@localhost ~]# sudo -u ralph sleep 3 & sleep 1; pstree -paul $!
  [1] 25451
  sleep,25451,ralph 3
  

• But after upgrading to RHEL 6.1 with sudo-1.7.4p5-5.el6 (and newer):

  [root@localhost ~]# sudo -u ralph sleep 3 & sleep 1; pstree -paul $!
  [1] 25513
  sudo,25513 -u ralph sleep 3
    └─sleep,25516,ralph 3