## As a normal user

~% ruby -v
ruby 1.8.6 (2008-03-03 patchlevel 114) [universal-darwin9.0]
~% ruby -e "puts '`echo $PATH`'"
/usr/local/bin:/usr/local/sbin:/Users/jay/bin:/opt/local/bin:/opt/local/sbin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/X11/bin:/Applications/Utilities/diglloyd/disktester:/usr/local/git/bin:/opt/local/lib/postgresql83/bin
~% irb
irb(main):002:0> ENV['PATH']
=> "/usr/local/bin:/usr/local/sbin:/Users/jay/bin:/opt/local/bin:/opt/local/sbin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/X11/bin:/Applications/Utilities/diglloyd/disktester:/usr/local/git/bin:/opt/local/lib/postgresql83/bin"
irb(main):003:0> `echo $PATH`
=> "/usr/local/bin:/usr/local/sbin:/Users/jay/bin:/opt/local/bin:/opt/local/sbin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/X11/bin:/Applications/Utilities/diglloyd/disktester:/usr/local/git/bin:/opt/local/lib/postgresql83/bin\n"
irb(main):004:0> exit

## As a sudo'd shell

~% sudo -s
Password:
~# ruby -e "puts '`echo $PATH`'"
/usr/bin:/bin:/usr/local/bin:/usr/local/sbin:/Users/jay/bin:/opt/local/bin:/opt/local/sbin:/usr/sbin:/sbin:/usr/X11/bin:/Applications/Utilities/diglloyd/disktester:/usr/local/git/bin:/opt/local/lib/postgresql83/bin
~# irb
irb(main):001:0> ENV['PATH']
=> "/usr/bin:/bin:/usr/local/bin:/usr/local/sbin:/Users/jay/bin:/opt/local/bin:/opt/local/sbin:/usr/sbin:/sbin:/usr/X11/bin:/Applications/Utilities/diglloyd/disktester:/usr/local/git/bin:/opt/local/lib/postgresql83/bin"
irb(main):002:0> `echo $PATH`
=> "/usr/bin:/bin\n"
irb(main):003:0> exit

## As a child of the sudo'd shell

~# zsh
~# ruby -e "puts '`echo $PATH`'"
/usr/local/bin:/usr/local/sbin:/Users/jay/bin:/opt/local/bin:/opt/local/sbin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/X11/bin:/Applications/Utilities/diglloyd/disktester:/usr/local/git/bin:/opt/local/lib/postgresql83/bin
~# irb
irb(main):001:0> ENV['PATH']
=> "/usr/local/bin:/usr/local/sbin:/Users/jay/bin:/opt/local/bin:/opt/local/sbin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/X11/bin:/Applications/Utilities/diglloyd/disktester:/usr/local/git/bin:/opt/local/lib/postgresql83/bin"
irb(main):002:0> `echo $PATH`
=> "/usr/local/bin:/usr/local/sbin:/Users/jay/bin:/opt/local/bin:/opt/local/sbin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/X11/bin:/Applications/Utilities/diglloyd/disktester:/usr/local/git/bin:/opt/local/lib/postgresql83/bin\n"