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Top Forums Shell Programming and Scripting How to remove answers and explanation parts from a text file with lots of questions.? Post 303041672 by MadeInGermany on Monday 2nd of December 2019 05:24:39 AM
Old 12-02-2019
To avoid an initial newline one can test for NR>1 or del==1:
Code:
awk '/^Answer:/{del=1} (del==1 && /^NO\./){del=0; print ""} del==0' test.txt

Here comes a portable sed solution:
Code:
sed '/^Answer:/{
  :Loop
  $d; N; /\nNO\./!bLoop
  s/.*\(\n\)/\1/
}' test.txt

GNU sed needs $d, to not default-print the last "Answer:" section.
A multi-liner easiliy supports a Unix sed.
This User Gave Thanks to MadeInGermany For This Post:
 

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POSTFIX2DLF_MAIN.IN(1)					  LogReport's Lire Documentation				    POSTFIX2DLF_MAIN.IN(1)

NAME
postfix2dlf_main - convert postfix2dlf_pre output to email dlf SYNOPSIS
postfix2dlf_main dumpfile DESCRIPTION
postfix2dlf_main expect a preprocessed postfix logfile, as written by postfix2dlf_pre(1) on STDIN. It prints a Lire email DLF file on stdout, using a Berkeley DB in dumpfile, holding a mapping from hostname-queueid to number-of-lines-with-this-id. DEVELOPERS
Datastructures are the same as the ones in sendmail2dlf. %msg stores all currently being processed information from the log. In sendmail2dlf, this hash is indexed by dlfid's: $dlfid = $log->{'hostname'} . $log->{'queueid'} . In postfix2dlf we use just the queueid, for now. Scalar values: $msg{$dlfid} = { logrelay => ..., queueid => ..., time => ..., nrcpts => ..., from_user => ..., from_domain => ..., from_relay_host => ..., from_relay_ip => ..., size => ..., msgid => ..., }; Furthermore: $del = $msg{$dlfid}->{deliveries}{$to}; $to is an email address as returned by &Lire::Email::sanitize_tos . $del->{to_user} = ....; $del->{to_domain} = ....; Other $del keys with scalar values: to_relay_host to_relay_ip delay xdelay stat xstat . The hash reference $msg{$dlfid} is often assigned to `$cur'. EXAMPLES
postfix2dlf_main will be rarely used on its own: it is called by postfix2dlf(1). Refer to the postfix2dlf manpage for examples and usage information. SEE ALSO
postfix2dlf(1), postfix2dlf_pre(1), sendmail2dlf(1) VERSION
$Id: postfix2dlf_main.in,v 1.10 2006/07/23 13:16:34 vanbaal Exp $ COPYRIGHT
Copyright (C) 2002 Stichting LogReport Foundation LogReport@LogReport.org This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program (see COPYING); if not, check with http://www.gnu.org/copyleft/gpl.html. AUTHOR
Joost van Baal Lire 2.1.1 2006-07-23 POSTFIX2DLF_MAIN.IN(1)
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