On 12/04/2014 02:13 PM, John Kendall wrote: > Yes, that's what I've done. The corner case I mentioned is > handled badly by this, however. In the corner case $FILE > is a list of files separated by a newlines. Solaris cut would > list them and then the ============= would be tacked > on to the last line:
Again, mention your goal up front, and you can save us some iterations.
So you really DO want to grab a rectangular region of text, and append
to just the last line, rather than chop a single line of input at a
fixed length (it was not obvious to us from the naming or your example
that you intended for $FILE to contain newlines).
So, my solution of using command substitution still does this, and portably:
echo "$(echo "$FILE ============================"| cut -c1-30)" \
" matches =========="
So does sed, although no longer a short one-liner:
echo "$FILE" | sed -e 's/^\(.\{30\}\).*/\1/' \
-e '$ {' \
-e 's/$/ ============================/' \
-e 's/^\(.\{30\}\).*/\1/' \
-e '$ s/$/ matches ==========/' \
-e '}'
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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