I am trying to find a way to check the current status of a file. Such as some cron job processes are dependent on the completion of others. if a file is currently being accessed / modified or simply open state I will wait until it is done being processed before attempting the next process on that... (3 Replies)
Hi
I am trying to use shell script to display file permissions, and I can do it fine for the current user logged in, but now I want to view all file permissions for the Owner of the file, Group users and everyone, so it will look something like this:
-----------------READ WRITE EXECUTE
OWNER... (11 Replies)
Hi,
I want to create a file from a shell script. the data for the file will come from variables. that is the file format is like,
var1-value var2_value ...
that is, var1_value should be placed in first 10 spaces and var2_value should be placed in next 8 columns like that.
is there... (4 Replies)
hi All,
my query...
1.I Have to search for the files in the root directory.
2.i have to search for a pattern in all the files in the root directory and then replace them with a new pattern.
3.Rename the file
Explanation:
if ABC is the root folder and has 3 subfolders and there are 15... (9 Replies)
Hi friends
please help me on below,
i have 5 files like below
file1 is
x 10
y 20
z 15
file2 is
x 100
z 245
file3 is
y 78
z 23
file4 is
x 100 (3 Replies)
Hi linux users,
I have a file with following format.
{
Name shiva;
location Delhi;
travelID IDNumber;
}
4
(
(0.1 0.2 0.3) 1234
(1.1 1.2 1.3) 12345
(2.1 2.2 2.3) 12354
(3.1 3.2 3.3) 123667
)now i wanted to write this data in separate files as... (2 Replies)
I have input data looks like this which is a part of a csv file
7,1265,76548,"0102:04"
8,1266,76545,"0112:04"
I need to make the output data should look like this and the output data will be part of text file:
7|1265000 |7654899 |A|
8|12660000 |76545999 |B|
The logic behind the... (6 Replies)
Hi All,
Kindly help on the below issue ASAP. Its very urgent.
I have script in which we have below two lines for code and it is not working. Please help.
files_to_process="
abc_*.log
def_*.log
ghi_*.log
"
typeset -A dir_list ${files_to_process}
the script is failing in Linux... (3 Replies)
Discussion started by: tvbhkishore
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)