foreach f ($argv) # foreach command argument if (-d $f) goto error # if a directory, goto error sed -f pass1 $f > /tmp/xyz$$ # sed stores in /tmp/xyz$$ sed -f pass2 /tmp/xyz$$ > $f # then stores back in $f end # end of foreach goto done: # skip the error part error: # just label, no other effect echo Error - $f is a directory. # print message goto end: # exit script avoiding "rm" done: # just a label rm /tmp/xyz$$ # remove temporary file end: # last label, nothing after it