At 01:51 14.02.2006, Randy Pratt wrote:
Hi,
I'm replying offlist since this isn't particularly a FreeBSD
question.
Something like this may work for you:
addline.sh:
======================================
#!/bin/sh
#Check if file begins with blank line, if not, insert a blank line
firstline="`head -1 "${1}"`"
if [ "${firstline}" = "" ]; then
#echo "its a blank"
else
#echo "insert line"
sed -i "" '1{s/^/\
/;}' "${1}"
fi
=====================================
Usage: addline.sh somefile.txt
If you needed to do many files, then make a loop to do each one
for i in *.txt; do addline.sh "$i"; done
or whatever syntax you need for the shell you are using. I missed
the beginning of the thread so I'm not sure of all the details.
Caveat: This should be checked with some sample files before
using on your good files. I just did a few minimal tests.
Note that this:
sed -i "" '1{s/^/\
/;}' "${1}"
is not a typographical error. It is adding the newline after
the blank line. Check some of the online sed tutorials
for an explanation of the syntax. The manual page for sed
is a bit terse ;-)
Hope this helps more than it confuses!
Randy
--
Hello Randy!
Sorry to disturb, but how can I make this script add a blank line to the top
of all ASCII files except the ones that contain at the beginning "#!"?
It would also be nice to rule out certain filetypes.
#!/usr/local/bin/bash
#
# Add blank line to the top of text files.
# $ARBA: blank.sh,v 1.0 2007/11/11 15:09:05 vaafExp $
#
# Use: blank
for file in `find -s . -type f -not -name ".*"`; do
if file -b "$file" | grep -q 'text'; then
echo > blank
mv $file $file.tmp
cat blank $file.tmp >> $file
rm -f $file.tmp
rm -f blank
echo "$file: Done"
fi
done
Thanks!
Vaaf
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