How can I tell (in script) how many Terminals are open in mac os x?

how can I 开发者_开发知识库tell how many Terminal windows (in mac os x) are currently opened? this needs to be done from a shell script.

thanks,

This script does what you ask for, you use osascript to run it from the cmd line.

tell application "Terminal"
    set c to 0
    repeat with i from 1 to (count of windows)
        set c to c + (count of tabs in window i)
    end repeat
    c
end tell

Edit by Bavarious: In order to use Adam’s AppleScript inside a shell script, you can do the following:

#!/bin/bash
read -d '' OSASCRIPT << EOF
    tell application "Terminal"
        set c to 0
        repeat with i from 1 to (count of windows)
            set c to c + (count of tabs in window i)
        end repeat
        c
end tell
EOF

nwindows=$(osascript -e "${OSASCRIPT}")

cnt=$(w -h | grep "^$(whoami) *s[^ ]* *-"|wc -l)
echo Your current terminal sessions: $cnt