Date: Thu, 18 Mar 1999 08:09:23 +0000 From: Mark Ovens <marko@uk.radan.com> To: cjclark@home.com Cc: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: sed and newlines Message-ID: <36F0B4B3.9A6C8AF0@uk.radan.com> References: <199903172339.SAA06674@cc942873-a.ewndsr1.nj.home.com>
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"Crist J. Clark" wrote:
>
> The sed manpage says,
>
> Sed Regular Expressions
> The sed regular expressions are basic regular expressions (BRE's, see
> regex(3) for more information). In addition, sed has the following two
> additions to BRE's:
> .
> .
> .
> 2. The escape sequence \n matches a newline character embedded in the
> pattern space. You can't, however, use a literal newline character
> in an address or in the substitute command.
>
> If I am reading this correctly,
>
> % sed 's/\n/ /' file
>
I would say that this is using a literal newline in the substitute
command, which, as you quote above, is explicitly forbidden. If my
understanding of sed is correct it processes one line at a time and
what you are trying to do is concatenate the current line and the
following one (which isn't in the pattern space).
> Should take the file and subsitute three spaces in place of every
> newline. However, it does not. It does not seem to understand '\n.'
>
> In spite of what it says, I have tried literal newlines (with \ and
> ^V), and as claimed on the manpage, it does not work (it will
> generate errors).
>
> Am I missing something obvious? Or is sed broken?
>
> Thanks.
> --
> Crist J. Clark cjclark@home.com
>
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--
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My Webpage http://www.users.globalnet.co.uk/~markov
_______________________________________________________________
Mark Ovens, CNC Apps Engineer, Radan Computational Ltd. Bath UK
CAD/CAM solutions for Sheetmetal Working Industry
mailto:marko@uk.radan.com http://www.radan.com
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