hi,
cut -d is unreliable in this case, as the ps output is formatted. so if you have two process ids of different length (i.e., 345, 23456) there will be leading spaces on the shorter one.
instead, use 'cut -c1-5'
then, you have to embed your command in a loop, like this:
Code:
for each in `command`;do kill -9 $each;done
the var $each is automatically created. the result of command in backticks is a list over which the for loop iterates.
Hello everybody.I want to make clear that i am not going to ask from anybody to build my asignement but i have a big problem. I can't seem to find anywhere ONE good example on C about what i am trying to do:wall:.I think it is simple. All i ask is one example, even a link is fine.
So, i want to... (1 Reply)
Hello,
I am trying to make a bash script that can pull data from a file and then change one part of said data.
I want to search by username and pull the full line. That way there is a way to replace just one part of that line then return it back to the file.
My Data is stored like:
... (1 Reply)
Guy's,
I need help with creating a pipe, I found this code online but not exactly sure what different parts are doing.
Will someone be able to help me with explaining what code is doing?
Also what I want is to have everything the same directory. Meaning I am working in directory:
I want... (5 Replies)
Hi,
I'm trying to write a script that checks gvfs to see if a mount exists so I can run it from network-manager's status hooks. I thought I'd pipe the output of gvfs-mount -l to grep for the particular mounts I care about. When I do this in a bash script:
cmnd="gvfs-mount -l | grep -i... (4 Replies)
Hello.
I want to get all modules which are loaded and which name are exactly 2 characters long and not more than 2 characters and begin with "nv"
lsmod | (e)grep '^nv????????????
I want to get all modules which are loaded and which name begin with "nv" and are 2 to 7 characters long
... (1 Reply)
Hi all,
Am trying to convert a script from ksh to bash :wall:. One of the sub is something like below:
#!/bin/bash
declare -a array01
step_01_test()
{
local count=0
ps -ef | grep watch | grep -v grep | awk '{ print $8 }' | while read line
do
let count=${count}+1
... (1 Reply)
Heays
So i have that script to which i'd like to pipe (rather than just regular arguments) some data from another virtual output command.
Simplified:
echo * | script.sh
When i know how many args i expect, i can handle this simple by:
&& \
read ONE TWO && \
set ONE TWO
echo "$1 : $2... (7 Replies)
What is the proper way to run two bash loops in the same command? The two below loops run separately, the problem is when I pipe them I get an error that the file used for the second loop does not exist. I am not sure how to wait for the first loop to complete and then start the second. Thank... (10 Replies)
Discussion started by: cmccabe
10 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)