Date: Sat, 25 Feb 2006 21:43:59 +0100 From: Kristian Vaaf <vaaf@broadpark.no> To: Randy Pratt <bsd-unix@comcast.net> Cc: questions@freebsd.org Subject: Re: How to ensure one blank line on top of ASCII files? Message-ID: <7.0.1.0.2.20060225214016.021e6cc0@broadpark.no> In-Reply-To: <20060213195118.51e1334f.bsd-unix@comcast.net> References: <20060213195118.51e1334f.bsd-unix@comcast.net>
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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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