UNIX for Dummies Questions & Answers

 
#!/bin/csh
set p1="$1"
shift
set p2="$1"
shift
foreach x ($*)
if ( { grep -w -c "$p1" $x } ) then
mv $x $x.bak
sed "s/$p1/$p2/g" $x.bak > $x
else
endif
end

#!/bin/csh
set pattern=$1
set newpattern=$2
shift
shift

set b = ( $* )
 foreach i ( $b )
       if ( { grep -w "$pattern" "$i" } ) then
            mv $i $i.bak
            sed "s/$pattern/$newpattern/g" $i.bak > $i
            shift
       endif
 end

./myscript "pattern" "newpattern"  file1 file2 file3.....