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Full Discussion: tail display ....in perl
Top Forums Shell Programming and Scripting tail display ....in perl Post 302158411 by zedex on Tuesday 15th of January 2008 07:19:23 AM
Old 01-15-2008
Error tail display ....in perl

hi
we have 3 servers and we have a script to monitor cpu usage of all 3 servers and writes into one file on one of the server where we monitor all those servers ( by doing tail -f filename ) so we decided to create script ( perl ) that will read values from this file and display it should be like "top" command it will refresh on its own without quitting ...can u guys provide me ideas ?

sample log file is as follows :

Code:
20080115_172824_Hpux1571        801     Hpux1571        0       0
20080115_172826_Hpux1570        801     Hpux1570        6       0
20080115_172832_Hpux1572        801     Hpux1572        65      0
20080115_172835_Hpux1571        801     Hpux1571        0       0
20080115_172838_Hpux1570        801     Hpux1570        1       0
20080115_172844_Hpux1572        801     Hpux1572        60      0
20080115_172847_Hpux1571        801     Hpux1571        0       0
20080115_172849_Hpux1570        801     Hpux1570        6       0

my current scripts prints like this :
Code:
Hpux1571       :       0
 Hpux1570       :       6
 Hpux1572       :       65
 Hpux1571       :       0
 Hpux1570       :       1
 Hpux1572       :       60

it should display like :
Code:
$tailit.pl  
Hpux1570      :        6
Hpux1571      :        0
Hpux1572      :        65

extracting values is not a problem , problem is that displaying only latest values from them .....
suggest something ...
 

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IRSEND(1)							   User Commands							 IRSEND(1)

NAME
irsend - basic LIRC program to send infra-red commands SYNOPSIS
irsend [options] DIRECTIVE REMOTE CODE [CODE...] DESCRIPTION
Asks the lircd daemon to send one or more CIR (Consumer Infra-Red) commands. This is intended for remote control of electronic devices such as TV boxes, HiFi sets, etc. DIRECTIVE can be: SEND_ONCE - send CODE [CODE ...] once SEND_START - start repeating CODE SEND_STOP - stop repeating CODE LIST - list configured remote items SET_TRANSMITTERS - set transmitters NUM [NUM ...] SIMULATE - simulate IR event REMOTE is the name of a remote, as described in the lircd configuration file. CODE is the name of a remote control key of REMOTE, as it appears in the lircd configuration file. NUM is the transmitter number of the hardware device. For the LIST DIRECTIVE, REMOTE and/or CODE can be empty: LIST "" "" - list all configured remote names LIST REMOTE "" - list all codes of REMOTE LIST REMOTE CODE - list only CODE of REMOTE The SIMULATE command only works if it has been explicitly enabled in lircd. -h --help display usage summary -v --version display version -d --device use given lircd socket [/var/run/lirc/lircd] -a --address=host[:port] connect to lircd at this address -# --count=n send command n times EXAMPLES
irsend LIST DenonTuner "" irsend SEND_ONCE DenonTuner PROG-SCAN irsend SEND_ONCE OnkyoAmpli VOL-UP VOL-UP VOL-UP VOL-UP irsend SEND_START OnkyoAmpli VOL-DOWN ; sleep 3 irsend SEND_STOP OnkyoAmpli VOL-DOWN irsend SET_TRANSMITTERS 1 irsend SET_TRANSMITTERS 1 3 4 irsend SIMULATE "0000000000000476 00 OK TECHNISAT_ST3004S" FILES
/etc/lirc/lircd.conf Default lircd configuration file. It should contain all the remotes, their infra-red codes and the corresponding timing and wave- form details. DIAGNOSTICS
If lircd is not running (or /var/run/lirc/lircd lacks write permissions) irsend aborts with the following diagnostics: "irsend: could not connect to socket" "irsend: Connection refused" (or "Permission denied"). SEE ALSO
The documentation for lirc is maintained as html pages. They are located under html/ in the documentation directory. lircd(8), mode2(1), smode2(1), xmode2(1), irrecord(1), irw(1), http://www.lirc.org. irsend 0.9.0-pre1 October 2010 IRSEND(1)
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