GNU bug report logs - #30242
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Package: grep;

Reported by: Masoudi <hassan_masoudi2000 <at> yahoo.com>

Date: Wed, 24 Jan 2018 21:01:02 UTC

Severity: normal

Tags: notabug

Done: Eric Blake <eblake <at> redhat.com>

Bug is archived. No further changes may be made.

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Report forwarded to bug-grep <at> gnu.org:
bug#30242; Package grep. (Wed, 24 Jan 2018 21:01:02 GMT) Full text and rfc822 format available.
Acknowledgement sent to Masoudi <hassan_masoudi2000 <at> yahoo.com>:
New bug report received and forwarded. Copy sent to bug-grep <at> gnu.org. (Wed, 24 Jan 2018 21:01:02 GMT) Full text and rfc822 format available.

Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Masoudi <hassan_masoudi2000 <at> yahoo.com>
To: "bug-grep <at> gnu.org" <bug-grep <at> gnu.org>
Subject: help
Date: Wed, 24 Jan 2018 20:51:49 +0000 (UTC)

[Message part 1 (text/plain, inline)]
Hii want to copy some data from a file by using of grep...grep -n A HISTORY > outbut the desired information is not the line of A, and i need information located at the next line ( below line of A)
A  1   2   3
23   34  55
i mean i need the line 23 34 55.would you mind to help me please?many thanks

[Message part 2 (text/html, inline)]
Added tag(s) notabug. Request was from Eric Blake <eblake <at> redhat.com> to control <at> debbugs.gnu.org. (Wed, 24 Jan 2018 22:23:02 GMT) Full text and rfc822 format available.
Reply sent to Eric Blake <eblake <at> redhat.com>:
You have taken responsibility. (Wed, 24 Jan 2018 22:23:03 GMT) Full text and rfc822 format available.
Notification sent to Masoudi <hassan_masoudi2000 <at> yahoo.com>:
bug acknowledged by developer. (Wed, 24 Jan 2018 22:23:03 GMT) Full text and rfc822 format available.

Message #12 received at 30242-done <at> debbugs.gnu.org (full text, mbox):

From: Eric Blake <eblake <at> redhat.com>
To: Masoudi <hassan_masoudi2000 <at> yahoo.com>, 30242-done <at> debbugs.gnu.org,
 GNU bug control <control <at> debbugs.gnu.org>
Subject: Re: bug#30242: help
Date: Wed, 24 Jan 2018 16:22:32 -0600

[Message part 1 (text/plain, inline)]
tag 30242 notabug
thanks

On 01/24/2018 02:51 PM, Masoudi wrote:
> Hii want to copy some data from a file by using of grep...grep -n A HISTORY > outbut the desired information is not the line of A, and i need information located at the next line ( below line of A)
> A  1   2   3
> 23   34  55
> i mean i need the line 23 34 55.would you mind to help me please?many thanks

(Your email engine botched the formatting of your mail as rendered in
plain text; technical lists tend to frown on html mail as unnecessary
overhead and lousy rendering)

grep already supports this: use 'grep -A1 "$pattern"' to output a line
that matches and the line immediately following the match.  If you
further want ONLY the line after, you can do things like:

grep -n -A1 "$patt" | sed -n 's/^[1-9][0-9]*-//p'

which uses the decorate-act-undecorate paradigm (grep -n decorates
matches with 'line:' and followups with 'line-'; the sed then picks the
followups and removes the decorations).

As -A is already documented as a grep option, I'm closing this as not a
bug in the database.  However, feel free to followup with further
questions on the topic.

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org


[signature.asc (application/pgp-signature, attachment)]
bug archived. Request was from Debbugs Internal Request <help-debbugs <at> gnu.org> to internal_control <at> debbugs.gnu.org. (Thu, 22 Feb 2018 12:24:04 GMT) Full text and rfc822 format available.
This bug report was last modified 7 years and 202 days ago.

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