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Full Discussion: Help with understanding this regex in a Perl script parsing a 'complex' string
Top Forums UNIX for Beginners Questions & Answers Help with understanding this regex in a Perl script parsing a 'complex' string Post 303035080 by RudiC on Tuesday 14th of May 2019 03:36:54 AM
Old 05-14-2019
My perl is non-existent, so no help possible here. But - why not a simple awk solution, like
Code:
awk '
match ($4, "SERVICE_NAME=" SRV) {if (match ($4, /PROGRAM=[^)]*/)) P  = substr ($4, RSTART, RLENGTH)
                                 if (match ($4, /USER=[^)]*/))    U  = substr ($4, RSTART, RLENGTH)
                                 if (match ($4, /HOST=[^)]*/))    H  = substr ($4, RSTART, RLENGTH)
                                 if (match ($6, /HOST=[^)]*/))    IP = substr ($6, RSTART, RLENGTH)
                                 print P, H, U, IP
                                }
' SRV="fail_app" OFS="\t" file2
PROGRAM=C:\Windows\system32\exec01.exe    HOST=MNLAPP01    USER=!sysadmin01    HOST=10.11.11.123
PROGRAM=C:\Windows\system32\exec02.exe    HOST=MNLAPP01    USER=!sysadmin01    HOST=10.11.11.123
PROGRAM=C:\Windows\system32\exec03.exe    HOST=MNLAPP01    USER=!sysadmin01    HOST=10.11.11.123
PROGRAM=C:\Windows\system32\exec01.exe    HOST=MNLAPP01    USER=!sysadmin01    HOST=10.11.11.123

EDIT: or


Code:
awk '
function chop(FLD, STR)          {if (match ($FLD, STR "=[^)]*")) return substr ($FLD, RSTART, RLENGTH)
                                 }
match ($4, "SERVICE_NAME=" SRV)  {print chop(4, "PROGRAM"), chop(4, "USER"), chop(4,"HOST"), chop(6, "HOST")
                                 }
' SRV="fail_app" OFS="\t" file2

Last edited by RudiC; 05-14-2019 at 05:31 AM..
These 2 Users Gave Thanks to RudiC For This Post:
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LEARN ABOUT CENTOS

net::time

Net::Time(3pm)						 Perl Programmers Reference Guide					    Net::Time(3pm)

NAME

       Net::Time - time and daytime network client interface

SYNOPSIS

	   use Net::Time qw(inet_time inet_daytime);

	   print inet_time();	       # use default host from Net::Config
	   print inet_time('localhost');
	   print inet_time('localhost', 'tcp');

	   print inet_daytime();       # use default host from Net::Config
	   print inet_daytime('localhost');
	   print inet_daytime('localhost', 'tcp');

DESCRIPTION

       "Net::Time" provides subroutines that obtain the time on a remote machine.

       inet_time ( [HOST [, PROTOCOL [, TIMEOUT]]])
	   Obtain the time on "HOST", or some default host if "HOST" is not given or not defined, using the protocol as defined in RFC868. The
	   optional argument "PROTOCOL" should define the protocol to use, either "tcp" or "udp". The result will be a time value in the same
	   units as returned by time() or undef upon failure.

       inet_daytime ( [HOST [, PROTOCOL [, TIMEOUT]]])
	   Obtain the time on "HOST", or some default host if "HOST" is not given or not defined, using the protocol as defined in RFC867. The
	   optional argument "PROTOCOL" should define the protocol to use, either "tcp" or "udp". The result will be an ASCII string or undef upon
	   failure.

AUTHOR

       Graham Barr <gbarr@pobox.com>

COPYRIGHT

       Copyright (c) 1995-2004 Graham Barr. All rights reserved.  This program is free software; you can redistribute it and/or modify it under
       the same terms as Perl itself.

perl v5.16.3							    2013-02-26							    Net::Time(3pm)
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