I think the functionality you are looking for is provided by vim, not by vi - it would give you the lines where the changes occurred if thats what you are after?
Hi there,
I have a problem here that involves bash script since I was noob in that field. Recently, I have to monitor data involve in logs so I just run command tail -f for the monitoring. The logs was generate every hour so I need to quickly change my logs every time the new hour hits according... (2 Replies)
I would like to monitor a log file using a shell script and as soon as a line with a certain string in it appears I would like to run a program. I have been playing around with doing this using tail -f, but cannot get it to work. I found something similar here:... (1 Reply)
hi All,
how to find a pattern in the log file & display the above and below line
for example in the log file, i have many lines, whenever i search for "Category" it should display the above line with only few parameter like i want only the location name & department name
Thu Jul 02 11:05:23... (2 Replies)
Hi Folks,
I need help in creating a script to monitor a continuously updating log for one particular error. If the the script finds the error it should send out an email.
Thanks for all ur help (2 Replies)
Hi Friends,
I am trying to write a script which continiously monitor one specific error message from a log file. This script should continiously monitor the file for the error and send out the email when detect the error message. I tried the below command but fails. Please help me.
tail -f... (4 Replies)
AM in need of some plugin/script that can monitor HP-UX file "/var/opt/resmon/log/event.log" .
Have written a scrip in sh shell that is working fine for syslog.log and mail.log as having standard format, have interrogated that to Nagios and is working as I required .
But same script failed to... (3 Replies)
This is my log file and this is live log.
Any abnormal error other than following
I need to generate the email.
Log path : /DER/app/admin/ABC/bdump/erg.log
Current log# 2 seq# 103046 mem# 0: /ora2/oradata/ABC/redo02a.log
Current log# 2 seq# 103046 mem# 1:... (1 Reply)
This is my log file and this is live log.
Any abnormal error other than following
I need to generate the email.
Log path : /DER/app/admin/ABC/bdump/erg.log
Current log# 2 seq# 103046 mem# 0: /ora2/oradata/ABC/redo02a.log
Current log# 2 seq# 103046 mem# 1:... (7 Replies)
Hi,
Have written a script to monitor linux non standard log file based on line numbers, so each check store $otalinenum ..
then in next check after 10 minutes it compre the current_total_line_num > last_total_line_num then it will parse the log file from last_total_line_num to... (0 Replies)
Hi,
I need to amend an existing ksh script so that it runs a process (stop weblogic) and in parallel needs to monitor a log file (startup.log) in the background for a certain string (e.g. unable to stop weblogic). If the string appears in the log i need to kill the stop weblogic process.
... (5 Replies)
Discussion started by: dholmaster
5 Replies
LEARN ABOUT DEBIAN
devel::refcount
Devel::Refcount(3pm) User Contributed Perl Documentation Devel::Refcount(3pm)NAME
"Devel::Refcount" - obtain the REFCNT value of a referent
SYNOPSIS
use Devel::Refcount qw( refcount );
my $anon = [];
print "Anon ARRAY $anon has " . refcount($anon) . " reference
";
my $otherref = $anon;
print "Anon ARRAY $anon now has " . refcount($anon) . " references
";
DESCRIPTION
This module provides a single function which obtains the reference count of the object being pointed to by the passed reference value.
FUNCTIONS
$count = refcount($ref)
Returns the reference count of the object being pointed to by $ref.
COMPARISON WITH SvREFCNT
This function differs from "Devel::Peek::SvREFCNT" in that SvREFCNT() gives the reference count of the SV object itself that it is passed,
whereas refcount() gives the count of the object being pointed to. This allows it to give the count of any referent (i.e. ARRAY, HASH,
CODE, GLOB and Regexp types) as well.
Consider the following example program:
use Devel::Peek qw( SvREFCNT );
use Devel::Refcount qw( refcount );
sub printcount
{
my $name = shift;
printf "%30s has SvREFCNT=%d, refcount=%d
",
$name, SvREFCNT($_[0]), refcount($_[0]);
}
my $var = [];
printcount 'Initially, $var', $var;
my $othervar = $var;
printcount 'Before CODE ref, $var', $var;
printcount '$othervar', $othervar;
my $code = sub { undef $var };
printcount 'After CODE ref, $var', $var;
printcount '$othervar', $othervar;
This produces the output
Initially, $var has SvREFCNT=1, refcount=1
Before CODE ref, $var has SvREFCNT=1, refcount=2
$othervar has SvREFCNT=1, refcount=2
After CODE ref, $var has SvREFCNT=2, refcount=2
$othervar has SvREFCNT=1, refcount=2
Here, we see that SvREFCNT() counts the number of references to the SV object passed in as the scalar value - the $var or $othervar
respectively, whereas refcount() counts the number of reference values that point to the referent object - the anonymous ARRAY in this
case.
Before the CODE reference is constructed, both $var and $othervar have SvREFCNT() of 1, as they exist only in the current lexical pad. The
anonymous ARRAY has a refcount() of 2, because both $var and $othervar store a reference to it.
After the CODE reference is constructed, the $var variable now has an SvREFCNT() of 2, because it also appears in the lexical pad for the
new anonymous CODE block.
PURE-PERL FALLBACK
An XS implementation of this function is provided, and is used by default. If the XS library cannot be loaded, a fallback implementation in
pure perl using the "B" module is used instead. This will behave identically, but is much slower.
Rate pp xs
pp 225985/s -- -66%
xs 669570/s 196% --
SEE ALSO
o Test::Refcount - assert reference counts on objects
AUTHOR
Paul Evans <leonerd@leonerd.org.uk>
perl v5.14.2 2011-11-15 Devel::Refcount(3pm)