The shell is not very good at arithmetic, so for small numbers, I prefer working with just a string -- grow the string by one character in the loop, and once the string is x characters long, quit. But here, obviously, the number is large enough that the traditional way of doing this is better.
On one of of solaris 7 boxes whenever i telnet or ftp it takes sometime before i get the prompt...any quick ideas where I should look...Thanks (3 Replies)
Discussion started by: suntan
3 Replies
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Hi All
We have one SCO Server here and it never gives us any trouble. Until Now!! Well its not earth shattering but we have one user who is complaining of a very slow response time when changing to his Home Directory. Other users who have similar profiles are OK. I have su'd to this user and I can... (0 Replies)
All of the sudden scp got really slow ... from 2-3 seconds to 30 seconds.
This happened for 5 hours, and then it went back to running fast.
Why?
If I use the -q qualifier which "Disables the progress meter" could this have any adverse effect?
Thanks (1 Reply)
ls displays files in tabbed output. Say a directory contains 3 files. ls will list all 3 in one line. So, I expect ls | wc -l to give 1, but it counts the nr of files and gives 3.
Can someone explain how this works? (3 Replies)
pls explain me how this works....
DECODE (SUBSTR (field, 1, 1),'''', '''''' || field || '''','''' || field || '''')
here field is a column in an oracle table.... (7 Replies)
When I try to execute script, I get message:
>aa.pl
zsh: command not found: aa.pl
but
>./aa.pl
works OK.
What to change in environment to force the former way to work?
Thank you,
Alex Z (4 Replies)
I have a program............
#include<stdio.h>
#include<unistd.h>
main()
{
if(fork == 0)
{
printf("Hi every body:p!!!!!!!!!!");
}
}
This program works with out any error. here fork is not a system call. It just act as a variable.But how it works without declaring it? What data type it... (19 Replies)
Discussion started by: carolsanjeevi
19 Replies
LEARN ABOUT DEBIAN
io::async::signal
IO::Async::Signal(3pm) User Contributed Perl Documentation IO::Async::Signal(3pm)NAME
"IO::Async::Signal" - event callback on receipt of a POSIX signal
SYNOPSIS
use IO::Async::Signal;
use IO::Async::Loop;
my $loop = IO::Async::Loop->new;
my $signal = IO::Async::Signal->new(
name => "HUP",
on_receipt => sub {
print "I caught SIGHUP
";
},
);
$loop->add( $signal );
$loop->run;
DESCRIPTION
This subclass of IO::Async::Notifier invokes its callback when a particular POSIX signal is received.
Multiple objects can be added to a "Loop" that all watch for the same signal. The callback functions will all be invoked, in no particular
order.
EVENTS
The following events are invoked, either using subclass methods or CODE references in parameters:
on_receipt
Invoked when the signal is received.
PARAMETERS
The following named parameters may be passed to "new" or "configure":
name => STRING
The name of the signal to watch. This should be a bare name like "TERM". Can only be given at construction time.
on_receipt => CODE
CODE reference for the "on_receipt" event.
Once constructed, the "Signal" will need to be added to the "Loop" before it will work.
AUTHOR
Paul Evans <leonerd@leonerd.org.uk>
perl v5.14.2 2012-10-24 IO::Async::Signal(3pm)