could any one tell me why i m not getting the value of variable i outside the
while loop in file reading
cat filename | while read line
do
i=2
done
echo $i
here it is not showing the value of i . what i have to do if i want to persist the value of
i outside the while loop
thanks
In this case, the pipe spawns a sub-shell and assigns i=2. When it comes out of the subshell, it does retain the value of i. Think scoping and you will understand.
Do this and you will get what you are looking for
Last edited by vino; 11-27-2007 at 05:34 AM..
Reason: minor correction.
Hi
How can i dynamically read files names from a list file and execute them from a single shell script.
Please help its urgent
Thanks in Advance (4 Replies)
Hi Gurus,
I am having an requirement. i have to read a list file which contains file names and send mail to different users based on the files in the list file.
eg. if file a.txt exists then send a mail to a@a.com
simillary for b.txt,c.txt etc.
Thanks for your help,
Nimu (6 Replies)
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Abc
... (2 Replies)
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I am running this command through a shell script and getting the error mentioned in the subject line:
testing.awk -f x.txt TNAME
My testing.awk file contains something like
++++++++++++++++++
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Hi All
I have written the following script:
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while read cmdline
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pid="$cmdline"
done<commands.txt
===========
commands.txt contains:
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<sequence>
<Filename>aldorzum.doc</Filename>
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</sequence>... (1 Reply)
hi guys, i want help... Reding XML file and print the values into the text file using linux shell script file as per below xml file
<sequence>
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<DivisionCode>US</DivisionCode>
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<ProductCode>VIMZIM</ProductCode>
</sequence>... (4 Replies)
So I'm stumped.
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Discussion started by: Brusimm
3 Replies
LEARN ABOUT DEBIAN
io::async::timer::absolute
IO::Async::Timer::Absolute(3pm) User Contributed Perl Documentation IO::Async::Timer::Absolute(3pm)NAME
"IO::Async::Timer::Absolute" - event callback at a fixed future time
SYNOPSIS
use IO::Async::Timer::Absolute;
use POSIX qw( mktime );
use IO::Async::Loop;
my $loop = IO::Async::Loop->new;
my @time = gmtime;
my $timer = IO::Async::Timer::Absolute->new(
time => mktime( 0, 0, 0, $time[4]+1, $time[5], $time[6] ),
on_expire => sub {
print "It's midnight
";
$loop->stop;
},
);
$loop->add( $timer );
$loop->run;
DESCRIPTION
This subclass of IO::Async::Timer implements one-shot events at a fixed time in the future. The object waits for a given timestamp, and
invokes its callback at that point in the future.
For a "Timer" object that waits for a delay relative to the time it is started, see instead IO::Async::Timer::Countdown.
EVENTS
The following events are invoked, either using subclass methods or CODE references in parameters:
on_expire
Invoked when the timer expires.
PARAMETERS
The following named parameters may be passed to "new" or "configure":
on_expire => CODE
CODE reference for the "on_expire" event.
time => NUM
The epoch time at which the timer will expire.
Once constructed, the timer object will need to be added to the "Loop" before it will work.
Unlike other timers, it does not make sense to "start" this object, because its expiry time is absolute, and not relative to the time it is
started.
AUTHOR
Paul Evans <leonerd@leonerd.org.uk>
perl v5.14.2 2012-10-24 IO::Async::Timer::Absolute(3pm)