I need your help please.
In a production system, i've seen many running process as follow:
sh -c ./pathname/shellname
what exactly the flag option -c is used for?
ive tried to look at the man page, but it doesnt say much.
ill appreciate yor help. Thanks (4 Replies)
Hello All,
I did very stupid mistake and lost all my crontab enteries on root prompt.
Please help me to solve this issue.
i did entry on root prompt like this.
crontab /home/back.cron
and enters
but when i enter crontab -l so its only showing 1 entry defined in back.cron
and all... (2 Replies)
Hi,
I would like to know if there's any option to use with the du command so that I can list only the files/directories on the current filesystem... I usually use
du -gs *But I'd like to see only the directories in the filesystem I am on, and not the mount point directory of other fss...
... (6 Replies)
#!/bin/bash
while :
do
./abc.sh PB
sleep 60
./abc.sh RA
sleep 60
./abc.sh GS
sleep 68400
done
Instead of making the script sleep for sometime, it doesn't work all the time as time may shift over a period.
How to make a script wake up every 30 seconds and check the current time, if... (2 Replies)
i am trying to patch a solaris 10 server using live upgrade.
issue is, when i create a new BE and activate it during reboot the file system that are mounted but doesnt have an entry in vfstab are automatically added in vfstab of new BE.
looks like live upgrade uses df -h output as reference... (0 Replies)
Hi,
In a file, I have to mark duplicate records as 'D' and the latest record alone as 'C'.
In the below file, I have to identify if duplicate records are there or not based on Man_ID, Man_DT, Ship_ID and I have to mark the record with latest Ship_DT as "C" and other as "D" (I have to create... (7 Replies)
Hi all,
We dont have access to aix source code and i have a doubt.
The flag SC_NO_RESERVE, is it got to do anything with the failover?
If the flag is set the paths are going to failed state. If flag is not set everything comes up fine after failover.
Thanks in advance for helping
... (2 Replies)
Hey, all!
Why is the "human readable" flag changing the behavior of du? And while I'm at it, can you make du only look at files, not directories. I often find myself wanting to find the largest file(s) in a dir or vol. Using 'find' itself, it seems you have to at least be able to guess the size of... (2 Replies)
Hello -
I have a file in the followig format
LINE TEXT 1
Line TEXT 2
TIMESTARTED=Fri Aug 16 15:20:23 EDT 2013
START-OF-DATA
123
123444
23232323
END-OF-DATA
Line TEXT 9
I need to get all the lines between the Start of Data and End of Data and pipe it to a file so output should be
... (5 Replies)
.... means multi line
ddd,bug fgdrg
dfdfsdfdfsd
fsdfdfdfd
fdfdsfdsfsd
.......
flag2
......
aaa,bug sfsfsfsfs
dfdfsdfdfsd
fsdfdfdfd
fdfdsfdsfsd
......
flag1
......
ddd,bug fgdrg
dfdfsdfdfsd (9 Replies)
Discussion started by: yanglei_fage
9 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)