Hi ,
i' d like to use an awk script to automate the ripping of cds : here's how it works :
- i first create a file named songs.txt containing the name of the songs
- the scripts extracts the tracks of a cd with cdparanoia
- the scripts saves the contents of the dir with ls (ls > list.txt)
-... (0 Replies)
Hi Friends,
Can anyone tell me how can I set the password age limit for root user to 14 days....???
Also would like to add following for root password;
min-alpha --- 4
min-other --- 1
min-length -- 6
min-diff ----- 3
How can I do these on command line....???
Regards,
jumadhiya (7 Replies)
Hi
this question applies to Solaris 8,9,10 and opensolaris as in my environment it applies to all of these
Is there a limit on the size of the username (in /etc/passwd) or indeed does there come a point where, like the 8 character limitation of passwords, the system receives the input but... (6 Replies)
Hello, How do i check number of files currently opening in the linux server? Your help is highly appreciated. Thank you
---------- Post updated at 02:43 PM ---------- Previous update was at 02:19 PM ----------
never mind!! I got it.
---------- Post updated at 02:44 PM ---------- Previous... (3 Replies)
Hi,
I am using Solaris 10.
i was trying to make a new directory in /u04 but it don't let me make directory unless i remove some other directories.
i issued the following command
df -F ufs -o i
Filesystem iused ifree %iused Mounted on
/dev/dsk/c1t0d0s0 ... (2 Replies)
Hi
#Testing for file existence
if ; then
echo 'SCHOOL data is available for processing'
else
echo 'SCHOOL DATA IS NOT AVAILABLE FOR PROCESSING'
:
i wrote a script, where it begins by checking if file exists or not.
If it exists, it truncates the database... (2 Replies)
we want to backup all opened files by vi before editing also with version information. i wrote below alias to backup crontab file content with version info. What i want know is to make this opened files by vi. We want to prevent user mistakes by adding this alias.
alias crontab='DATE=$(date... (4 Replies)
Discussion started by: sebu
4 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)