copying and manipulating files

Shell Programming and Scripting
1

im copying alot of files this is a script im trying to modify but not sure how to make it copy files without an extension and then add a .txt to them

    abc=   #assuming the file does not have an end or extension
    foo='abc$'
    FROM=/user/share/doc
    TO=~/home/doc
    for grep $foo in $from do
    echo the files have no file extension
    cp -r $FROM $TO
2 
$ find /user/share/doc ! -name "*.*" -type f -print | awk -F\/ '{print "cp "$0" /home/doc/"$NF".txt"}' | sh
3

You must provide some criteria to treat the files without extensions.

e.g.

file should not contain the period ( "." ).
or
possible extension list like if the file doesn't contain the "txt" or "dat" extension treat the file as without extension.

4

should copy only the files without the end, those that do not match the pattern *.*