Can anyone tell me if the copy command in PERL has the same functionality as in KSH shell in UNIX or does it actually move the file ??
$cp_stat=system("cp $ENV{OLAMEBSDIR}/data/olam.ddabal$type $ENV{OLAMDIR}/balance/data/olam.ddabal$type.$HeaderDate"); (1 Reply)
I am new to perl. I have adopted some perl scripts that seem not to work 100%. I 've corrected such things as file sharing contention etc.
What these perl scripts basically do is extract specific records for statistical reporting of authentication and authorization from syslog daemon local... (5 Replies)
If I use 2 system commands in a script, will one finish before the next one starts? or will it start the first and the second at the same time?
i.e.
system("ps | grep rminer");
system("ls -al | grep 431"); (1 Reply)
I have created some DTS packages in SQL server 2000. The packages map input .dbf files to corresponding tables in the database. When I try to run the
package through Command prompt, it runs successfully and loads the data into tables. However same package when ran through perl gives different... (1 Reply)
In my code, I know I can write...
if ( defined &test_sub ) {
test_sub();
} else {
print "Subroutine doesn't exist";
}
This tests the existence of the test_sub subroutine without actually calling it.
If, though, I replace test_sub with a package method...
if ( defined... (1 Reply)
Hi
I am new to PERL and need to add a line to the perl script which issues a system call if certain pattern exists in the file, for example:
$system "my_command" if "my_pattern" exists in "my file"
Can somebody help me with the syntax? Thanks (4 Replies)
Hello everyone,
We have got a Server say Testserver with AIX 6.1 running on it.
We want to create user defined authorization for syslogd, ntpd and named . We don't want to use pre-defined authorization (aix.network.daemon). Is it possible to create an independent authorization for commands?... (1 Reply)
Hi All,
I am new to Perl and got a real stupid question. We are trying to install the Date:Calc package for some calculations with dates.The security guys mentioned they won't install it as root in /usr/bin/perl but have asked us to install it in any directory and use it from there.
Here's the... (2 Replies)
Hi, guys,
The content of file is below (from <UNIX® Shells by Example Fourth Edition>):
My code is below:
gawk -F'' ' { OFS = "****"; $3 = "(904)"; $8 = $5 + $6 + $7; print } ' lab3.data
The result is below:
So, where is the $1? Why is the variable $8 located at the wired position? (3 Replies)
Hello All,
I am writing the below script where it will connect to database and returns the results.
#!/sw/gcm/perl510/bin/perl
use SybaseC;
&openConnection;
&loadvalues;
sub openConnection {
$dbproc = new SybaseC(SYDB}, $ENV{DBDFLTUSR}, $ENV{DBDFLTPWD});
if... (2 Replies)
Discussion started by: filter
2 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)