Why don't you write it all in Perl (without embedding code)?
I tried it with the same error this was one of my tries. but with out any use. actually the system is ignoring the 'print \$F[0]' and print all the who command o/p.
Hi,
I want to run a crontab job on solaris 10.5. I have configured the crontab accordingly
10 * * * * /scripts/dbalter.pl >> /scripts/cronout.txt
However this does not work .Then I go to /var/mail/root and find an error in the output:
From root@myserver Wed Feb 4 17:02:00 2009... (1 Reply)
Hi Guys,
I wish to execute some shell commands through PERL.
Here is what I desire to do
1) I wish to find list of directories in current working location
2) Then go in each directory and execute few commands like
a) rm -rf *.log (Shell command)
b) coreBuilder -f cb_tests.tcl (Some... (6 Replies)
Hi,
I have a perl script which prints me the epoch value of a specific date and time given.Now I want to proceed to a next step ie i want to give the input at the time of execution.
I have to initialise the date and time values in the script before executing it.But now i want to give the date... (3 Replies)
If this is the wrong forum, move it. It seemed like the best.
Does anyone know of a perl thing that does the same thing as bash -x except for perl? I know I can output the information I want at the right times by actually putting that in the code, but it's harder... (2 Replies)
Hi All,
What happens when a Pelr script is executed.??(Jus like in C/C++ we have several stages like preprocessing,assembling,complining ,linkin',loadin'...)
So similiarly In Perl we have something like compile pahse and run phase. but what exactly happens during its exec and what all... (3 Replies)
hi everyone,
before stating my problem ,
i just want to say
thanks in advance for the time and trouble taken:-)
i am an newbie to perl programming,
the problem is a text file needed to be parsed,
i have looked over regular expressions and string matching but coudnt helped out..
the... (4 Replies)
Hi gurus,
I have a requirement where I need to remotely run a perl script as another user.
Running the script locally as the required user is fine, however I need to su with the script due to filesystem permission issues. I do not want to update permissions on the remote server due to security... (5 Replies)
I am trying to run SSH , mkdir and other unix commands using Perl CGI. But i am not able to Execute these commands.
Please help me out !!!!
SSH and mkdir is necessity for me.
I will be thankful to you...!!!!!
I am trying like:
In perl CGI file i am writing like: @list = `ssh... (28 Replies)
hi all,
when i tried executing the script by giving following command
$ sh test.sh <parameter>
it shows the following output:
<none>
status code=0
Previously it was working fine.But now its showing this output. (1 Reply)
I don't know to debug the program todaylive.pl program.
plz someone let me know what are the commands I need to know to debug the perl programs to find out the error on it. (3 Replies)
Discussion started by: ramkumar15
3 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)