# sccs: @(#)diffmk.sh 1.2 if test -z "$3" -o "$3" = "$1" -o "$3" = "$2"; then echo "usage: name1 name2 name3 -- name3 must be different" exit fi diff -e $1 $2 | (sed -n -e ' /[ac]$/{ p a\ .mc | : loop n /^\.$/b done1 p b loop : done1 a\ .mc\ . b } /d$/{ s/d/c/p a\ .mc *\ .mc\ . b }'; echo '1,$p') | ed - $1| sed -e ' /^\.TS/,/.*\. *$/b pos /^\.T&/,/.*\. *$/b pos p d :pos /^\.mc/d ' > $3