Just getting into the Unix command line programming and am unable to run any program I write. I am using a Makefile and the source is compiling but when I enter the name of the output file I get back:
bash: lab01exe.out: command not found
I'm sure I am just dooing something simple... (2 Replies)
How can I make a program run automatically at a certain time of day?
My problem is I need to make a small backup program that will back up a few files every day? (3 Replies)
This is not a question, but rather a simple how-to for
programmers who are new to the UNIX environment.
I too,am new to UNIX.
First I developed a few programs on my box and perfected them
until they were satisfactory for execution.
Problem was however, that once i compiled and all that,... (2 Replies)
Hi.Iam new to Linux.i got linux 7.0 pro and dont know how to run programs. I want a perl interputer and i know i installed one but how do i run it ??? Also how do i run a C or C++ editor ?and how do i run cron ? (3 Replies)
Hello,
My apologies if this sounds like a stupid question......
but is it possible to call a script that is located on a w2k machine from a csh script bing run on a unix server.
Many thanks
rkap (1 Reply)
hi ,
i need to run a parallel program .
for example;
program1
{
array=" the second program should called here : program 2"
the execution should continue
}
the 2nd program should recieve an array of information as argument and it should... (4 Replies)
Lets get some stuff out of the way before the question. I am currently running FreeBSD 7.0 on a VirtualBox virtual machine. I do not know much about Unix or FreeBSD, though I do run linux at home. My boss gave me some files that he says are a unix version of the program Dynflow. The Programs... (0 Replies)
Folks,
I'm really new to scripting and was wondering if you could help me out. I have the following script that I inherited:
#!/bin/bash
#
# Usage
# From the agent directory:
# ./run-any-agent AgentName
#
TAC_AGENT_HOME=`pwd`
LIB=${TAC_AGENT_HOME}/lib
CLASSPATH=.... (17 Replies)
Hello everyone.
I am logged into a computer through ssh. I would like to run a program and have it keep running after I log out without screen (i forgot to run it).
For example:
ssh server
user/comp~$ top &
12021
exit
after that:
ssh server
user/comp~$ (something, maybe shell... (5 Replies)
Discussion started by: lepetal
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)