more do shell scripts

i am trying to write a small program to eject disks that have a problem un mounting. i have a pretty go idea on how to accomplish this, but i am having a problem displaying the results into a textfield (xcode, applescript studio)


on clicked theObject
	if name of theObject is "quit" then
		try
			tell application "Eject Disk" to quit
		on error
			display dialog "could not quit!" buttons {"Ok"} default button 1 attached to window "main"
		end try
	end if
	if name of theObject is "diskInfo" then
		try
			--display dialog (do shell script "df") buttons {"Ok"} default button 1 attached to window "main"
			
			set theResult to do shell script "df"
			set x to the offset of "up" in theResult
			set theResult to (characters x thru -1 of theResult) as string
			set the contents of text view "output" of window "main" to theResult
			set needs display of text view "output" of window "main" to true
		on error theErr
			display dialog theErr
		end try
	end if
end clicked

i get the error can’t make characters x thru -1 of theResult and i am not really sure how to fix it.

I figured if out.


on clicked theObject
	if name of theObject is "quit" then
		try
			tell application "Eject Disk" to quit
		on error
			display dialog "could not quit!" buttons {"Ok"} default button 1 attached to window "main"
		end try
	end if
	if name of theObject is "diskInfo" then
		try
			set theResult to do shell script ("df " & "-t " & "hfs " & "| " & "awk " & "'{print " & "$1 " & ",$6,$7,$8,$9,$10}'")
			                      
			set the contents of text field "output" of window "main" to theResult
			set needs display of text field "output" of window "main" to true
			
			
		on error theErr
			display dialog theErr buttons {"Ok"} default button 1 attached to window "main"
		end try
	else if name of theObject is "run ps button" then
		display panel window "running ps window" attached to window "main"
		set the contents of text field "output" of window "main" to "no processes"
		set needs display of text field "output" of window "main" to true
	else if name of theObject is "check processes button" then
		tell window of theObject
			set thePS to contents of text field "running ps textfield"
			set theResult to do shell script ("fstat " & "| " & "grep " & "thePS")
			set the contents of text field "output" of window "main" to theResult
			set needs display of text field "output" of window "main" to true
			
		end tell
		close panel window "running ps window"
	else if name of theObject is "cancel" then
		close panel window "running ps window"
	end if
	
end clicked