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Full Discussion: Help with Bash piped while-read and a read user input at the same time
Top Forums Shell Programming and Scripting Help with Bash piped while-read and a read user input at the same time Post 302601421 by MyMorris on Thursday 23rd of February 2012 03:54:12 PM
Old 02-23-2012
Help with Bash piped while-read and a read user input at the same time
Hi
I am new to writing script and want to use a Bash Piped while-read and read from user input.

if something happens on server.log then do while loop or if something happend on user input then do while loop.

Pseudocode something like:
tail -n 3 -f server.log | while read serverline || read -p # -e promptline
do
if something happend on promptline then do this
if something happend serverline then do this

I appreciate all help.
Thanks
 

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LEARN ABOUT DEBIAN

sys::statistics::linux::netstats

Sys::Statistics::Linux::NetStats(3pm)			User Contributed Perl Documentation		     Sys::Statistics::Linux::NetStats(3pm)

NAME

       Sys::Statistics::Linux::NetStats - Collect linux net statistics.

SYNOPSIS

	   use Sys::Statistics::Linux::NetStats;

	   my $lxs = Sys::Statistics::Linux::NetStats->new;
	   $lxs->init;
	   sleep 1;
	   my $stat = $lxs->get;

       Or

	   my $lxs = Sys::Statistics::Linux::NetStats->new(initfile => $file);
	   $lxs->init;
	   my $stat = $lxs->get;

DESCRIPTION

       Sys::Statistics::Linux::NetStats gathers net statistics from the virtual /proc filesystem (procfs).

       For more information read the documentation of the front-end module Sys::Statistics::Linux.

NET STATISTICS

       Generated by /proc/net/dev.

	   rxbyt    -  Number of bytes received per second.
	   rxpcks   -  Number of packets received per second.
	   rxerrs   -  Number of errors that happend while received packets per second.
	   rxdrop   -  Number of packets that were dropped per second.
	   rxfifo   -  Number of FIFO overruns that happend on received packets per second.
	   rxframe  -  Number of carrier errors that happend on received packets per second.
	   rxcompr  -  Number of compressed packets received per second.
	   rxmulti  -  Number of multicast packets received per second.
	   txbyt    -  Number of bytes transmitted per second.
	   txpcks   -  Number of packets transmitted per second.
	   txerrs   -  Number of errors that happend while transmitting packets per second.
	   txdrop   -  Number of packets that were dropped per second.
	   txfifo   -  Number of FIFO overruns that happend on transmitted packets per second.
	   txcolls  -  Number of collisions that were detected per second.
	   txcarr   -  Number of carrier errors that happend on transmitted packets per second.
	   txcompr  -  Number of compressed packets transmitted per second.
	   ttpcks   -  Number of total packets (received + transmitted) per second.
	   ttbyt    -  Number of total bytes (received + transmitted) per second.

METHODS

   new()
       Call "new()" to create a new object.

	   my $lxs = Sys::Statistics::Linux::NetStats->new;

       Maybe you want to store/load the initial statistics to/from a file:

	   my $lxs = Sys::Statistics::Linux::NetStats->new(initfile => '/tmp/netstats.yml');

       If you set "initfile" it's not necessary to call sleep before "get()".

       It's also possible to set the path to the proc filesystem.

	    Sys::Statistics::Linux::NetStats->new(
	       files => {
		   # This is the default
		   path   => '/proc',
		   netdev => 'net/dev',
	       }
	   );

   init()
       Call "init()" to initialize the statistics.

	   $lxs->init;

   get()
       Call "get()" to get the statistics. "get()" returns the statistics as a hash reference.

	   my $stat = $lxs->get;

   raw()
       The same as get_raw() but it's not necessary to call init() first.

   get_raw()
       Call "get_raw()" to get the raw data - no deltas.

EXPORTS

       No exports.

SEE ALSO

       proc(5)

REPORTING BUGS

       Please report all bugs to <jschulz.cpan(at)bloonix.de>.

AUTHOR

       Jonny Schulz <jschulz.cpan(at)bloonix.de>.

COPYRIGHT

       Copyright (c) 2006, 2007 by Jonny Schulz. All rights reserved.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.14.2							    2012-03-09				     Sys::Statistics::Linux::NetStats(3pm)
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