hi
i´m making a program, and i would like to know how can i know what key was pressed. i'm using Sun5.7 and C.
is there a keypress/keypressed function in C?
how can i know recognize the keys (enter, tab, shift, etc.)?
can i recognize two keys ? (shift+A, ctrl+C, etc)
any idea.. thanks (4 Replies)
Hi all!
Well, you might have guessed it, I am looking for a way to control the return key under Solaris 8 and using telnet connections.
I notice a difference between Solaris and System V but I don't know exactly where to look for changes. The stty params are slightly different but as far as I... (2 Replies)
Is it possible to enter data into a read command and automatically enter, for instance
read name
echo "Andy" /r
could this work cos it doesn't seem to be working for me! (2 Replies)
hi folks,
i am using sun solaris, when i press escape key in putty/netterm screen will blink for a second, plese let me know where this setting is done by my admin, what i feel is my admin must have set some control key for this so that screen will refresh each time i press escape key. please let... (1 Reply)
Hello everyone.
I'm trying to create a script that waits a given amount of time unless a given key is pressed. I found a very useful thread here
https://www.unix.com/shell-programming-scripting/59605-trap-key-press-script.html
however, I cannot figure out a way of avoiding the keypress if the... (2 Replies)
Hi,
I'm porting an install script from AIX to Red Hat (2.6.18-164.el5 #1 SMP)
I have this script working in both AIX and HP-UX.
The script is a wrapper for a Micro Focus Server Express install program. It responds to the install program questions with a here-now list. Responses includes... (14 Replies)
Hi Experts,
I have a script in which I want to disable the "Enter" key press. Actually my script executes some process in background. So, till that background process is running, I don't want "Enter" key to be pressed by user. Is this can be achieved using trap command? (6 Replies)
Hi all,
I need to know how to test a pressed key is arrowup or arrowdown and etc..
I found that the "echo" won't print anything if i enter the arrowup in the below code:
read
echo "you pressed $REPLY"
Then i find a way to achieve my goal.
1 #! /bin/bash
2
3 ARROWUP='\;then... (4 Replies)
hi experts
Question in perl
i'm creating a script to take from user a different inputs one of them is the carriage return .. so that i want to make an if condition if the user hit enter key the user will go to previous step
it something like that
chomp ($input = <STDIN>);
if ($input =~... (3 Replies)
Hi Friends,
i am creating a shell script which is accepting file name as input parameter from Java and invoking finacle service.
The service will accpet text file,B2k_session id,etc and upload the text file data in finacle database.
My shell script looks like this:-
#! /bin/ksh... (2 Replies)
Discussion started by: vadlamudy
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)