Date: Sat, 9 Sep 2017 03:02:57 +0200 From: Polytropon <freebsd@edvax.de> To: Ernie Luzar <luzar722@gmail.com> Cc: "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org> Subject: Re: script code for end-line Message-ID: <20170909030257.d2718c00.freebsd@edvax.de> In-Reply-To: <59B332A3.1000205@gmail.com> References: <59B332A3.1000205@gmail.com>
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On Fri, 08 Sep 2017 20:15:31 -0400, Ernie Luzar wrote:
>
> I have a file that has blank lines with ^M in position one.
>
> I have this if [ "$end-line" = "^M"]; then
>
>
> Is that the correct way to code that between the quotes?
That will only match the literal string ^M (^ and M).
String evaluation and comparison at this low level
isn't a native skill of sh. There is a way of encoding
characters as octal values, such as \015 for \r, which
equals ^M and 0x0D, but /bin/test (which is [) can only
compare strings.
Here is a terrible workaround (not tested):
if [ `echo ${end-line} | od -x | head -n 1 | awk '{ print $2 }'` = "000d" ]; then
... do something ...
fi
Check if there is already a tool for what you're trying
to accomplish (e. g., tr, sed, recode, iconv). ;-)
--
Polytropon
Magdeburg, Germany
Happy FreeBSD user since 4.0
Andra moi ennepe, Mousa, ...
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