I have a script like this: export P4PORT=192.168.1.132:1666 passwd=`security find-generic-password -ws Exchange | /usr/bin/perl -pe "s/\n//g"` /usr/bin/expect -c "spawn /Users/myname/bin/p4 login; expect \"Enter password:\"; send \"$passwd\r\"; interact" res=`/Users/myname/bin/p4 login -s` osascript <<EOF tell app "System Events" to display dialog "$res" buttons "OK" default button 1 EOF which run