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Top Forums Shell Programming and Scripting Grep three consecutive lines if each lines contains certain string Post 302960587 by Saumitra Pandey on Tuesday 17th of November 2015 09:32:41 AM
Old 11-17-2015
Linux Grep three consecutive lines if each lines contains certain string

say we have :

Code:
2914 | REQUEST | whatever
2914 | RESPONSE | whatever
2914 | SUCCESS | whatever
2985 | RESPONSE | whatever
2986 | REQUEST | whatever
2990 | REQUEST | whatever
2985 | RESPONSE | whatever
2996 | REQUEST | whatever
2010 | SUCCESS | whatever
2013 | REQUEST | whatever
2013 | RESPONSE | whatever
2013 | SUCCESS | whatever
2076 | REQUEST | whatever
2078 | RESPONSE | whatever

should print:
Code:
2914 | REQUEST | whatever
2914 | RESPONSE | whatever
2914 | SUCCESS | whatever
2013 | REQUEST | whatever
2013 | RESPONSE | whatever
2013 | SUCCESS | whatever

already in one of the threads below command is used for 2 consecutive line. I want similar command for 3 consecutive line:
Code:
awk -F"|" '$2 ~ "REQUEST" {s=$0;f=1;next} f && $2 ~ "RESPONSE" {print s RS $0;f=0}' file

Also, please explain how the command works. I have very basic knowledge about awk.

Moderator's Comments:
Mod Comment edit by bakunin: please use CODE-tags yourself. I have provided a few from my own wealth of them as a welcome give, but from now on i will tax every occasion where i have to spend some on your texts with infraction points. Use CODE-tags, as required by the forum rules and we will get along well, though.

Last edited by bakunin; 11-17-2015 at 11:04 AM..
 

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Locale::Script(3)					User Contributed Perl Documentation					 Locale::Script(3)

NAME
Locale::Script - standard codes for script identification SYNOPSIS
use Locale::Script; $script = code2script('phnx'); # 'Phoenician' $code = script2code('Phoenician'); # 'Phnx' $code = script2code('Phoenician', LOCALE_CODE_NUMERIC); # 115 @codes = all_script_codes(); @scripts = all_script_names(); DESCRIPTION
The "Locale::Script" module provides access to standards codes used for identifying scripts, such as those defined in ISO 15924. Most of the routines take an optional additional argument which specifies the code set to use. If not specified, the default ISO 15924 four-letter codes will be used. SUPPORTED CODE SETS
There are several different code sets you can use for identifying scripts. A code set may be specified using either a name, or a constant that is automatically exported by this module. For example, the two are equivalent: $script = code2script('phnx','alpha'); $script = code2script('phnx',LOCALE_SCRIPT_ALPHA); The codesets currently supported are: alpha, LOCALE_SCRIPT_ALPHA This is a set of four-letter (capitalized) codes from ISO 15924 such as 'Phnx' for Phoenician. It also includes additions to this set included in the IANA language registry. The Zxxx, Zyyy, and Zzzz codes are not used. This is the default code set. num, LOCALE_SCRIPT_NUMERIC This is a set of three-digit numeric codes from ISO 15924 such as 115 for Phoenician. ROUTINES
code2script ( CODE [,CODESET] ) script2code ( NAME [,CODESET] ) script_code2code ( CODE ,CODESET ,CODESET2 ) all_script_codes ( [CODESET] ) all_script_names ( [CODESET] ) Locale::Script::rename_script ( CODE ,NEW_NAME [,CODESET] ) Locale::Script::add_script ( CODE ,NAME [,CODESET] ) Locale::Script::delete_script ( CODE [,CODESET] ) Locale::Script::add_script_alias ( NAME ,NEW_NAME ) Locale::Script::delete_script_alias ( NAME ) Locale::Script::rename_script_code ( CODE ,NEW_CODE [,CODESET] ) Locale::Script::add_script_code_alias ( CODE ,NEW_CODE [,CODESET] ) Locale::Script::delete_script_code_alias ( CODE [,CODESET] ) These routines are all documented in the Locale::Codes::API man page. SEE ALSO
Locale::Codes The Locale-Codes distribution. Locale::Codes::API The list of functions supported by this module. http://www.unicode.org/iso15924/ Home page for ISO 15924. http://www.iana.org/assignments/language-subtag-registry The IANA language subtag registry. AUTHOR
See Locale::Codes for full author history. Currently maintained by Sullivan Beck (sbeck@cpan.org). COPYRIGHT
Copyright (c) 1997-2001 Canon Research Centre Europe (CRE). Copyright (c) 2001-2010 Neil Bowers Copyright (c) 2010-2013 Sullivan Beck This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.16.3 2013-06-03 Locale::Script(3)
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