Can anyone tell me why this program won't kick out when the time gets beyond time in the loop?
sub showtime
{
local($format,$military)=@_;
($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst)=localtime(time);
if ((! $military) && ($hour > 12)) {$hour-=12;}
... (2 Replies)
my $i;
my $j;
for($i=1;$i<=5;$i++)
{
for($j=$i;$j<5;$j++)
{
print " ";
}
print "$i\n";
}
But the output i need is
1
12
123
1234
12345
Help me please (5 Replies)
I am using a Perl script to open a series of files in a loop, separate the paragraph into lines, and output the lines into a new file. The code works perfectly fine, except when the source file is over a certain size the loop gets stuck and won’t move on to the next file. It still does what it is... (0 Replies)
I need to process a file line-by-line using some value from a shell variable
Something like:perl -p -e 's/$shell_srch/$shell_replace/g' input.txt
I can't make the '-s' work in the '-p' or '-n' input loop (or couldn't find a syntaxis.)
I have searched and found... (4 Replies)
Another newbie question... I can not figure out how to get this running using a loop. Here is what I have now.
#!/usr/bin/perl
use SNMP::Info;
$list="list.list";
open(DAT, $list) || die("Can't Open List");
@raw_data=<DAT>;
close(DAT);
foreach $dest (@raw_data)
{... (2 Replies)
I am trying to print out a section of a file begining at the start and printng until a character is found.
My code and input file are below. This code is printing out every line except for the line with the character which is not what I want the out put should be a file with numbers 1-4.
... (3 Replies)
I wrote a script to list all lines in a file with Perl. I am having trouble with the looping part of it. My script is supposed to look at the file and as long as the file is larger than the current line it prints a new line.
I am getting an error that won't stop on the while line of my code I... (4 Replies)
I am trying to create a success and fail as below in a perl script :
while echo$? is 2 it should append as below to .fail file
=====================
if ( open(IN, "$outputfile"))
{
while( $my_line = <IN> )
{
#print "$my_line \n" ;
return 0;
... (3 Replies)
I have the below scenario in perl
cd $FIDE_RECEIVE ;
# see the files that start with feedmgr.usfed.tips
$CycleDate = &fi_get_curr_date('US','NIGHTLY_CYCLE','PROCESS');
head -1 GNM_GEO.DAT.EMBS* |grep -v GNM_GEO.DAT.EMBS | awk '{$4 " " $5}'
output for above command :... (3 Replies)
I have a script that needs to wait on another script to finish. I created a sub routine to check the file for the number 0 but my until statement keeps on going. I tried eq, == and =~ but same thing.
my $CHECKING_FILE = 1;
do {
sleep(5);
$CHECKING_FILE = check_file();
... (2 Replies)
Discussion started by: numele
2 Replies
LEARN ABOUT DEBIAN
io::async::loop::select
IO::Async::Loop::Select(3pm) User Contributed Perl Documentation IO::Async::Loop::Select(3pm)NAME
"IO::Async::Loop::Select" - use "IO::Async" with "select(2)"
SYNOPSIS
Normally an instance of this class would not be directly constructed by a program. It may however, be useful for runinng IO::Async with an
existing program already using a "select" call.
use IO::Async::Loop::Select;
my $loop = IO::Async::Loop::Select->new;
$loop->add( ... );
while(1) {
my ( $rvec, $wvec, $evec ) = ('') x 3;
my $timeout;
$loop->pre_select( $rvec, $wvec, $evec, $timeout );
...
my $ret = select( $rvec, $wvec, $evec, $timeout );
...
$loop->post_select( $rvec, $evec, $wvec );
}
DESCRIPTION
This subclass of "IO::Async::Loop" uses the select(2) syscall to perform read-ready and write-ready tests.
To integrate with an existing "select"-based event loop, a pair of methods "pre_select" and "post_select" can be called immediately before
and after a "select" call. The relevant bits in the read-ready, write-ready and exceptional-state bitvectors are set by the "pre_select"
method, and tested by the "post_select" method to pick which event callbacks to invoke.
CONSTRUCTOR
$loop = IO::Async::Loop::Select->new
This function returns a new instance of a "IO::Async::Loop::Select" object. It takes no special arguments.
METHODS
$loop->pre_select( $readvec, $writevec, $exceptvec, $timeout )
This method prepares the bitvectors for a "select" call, setting the bits that the Loop is interested in. It will also adjust the $timeout
value if appropriate, reducing it if the next event timeout the Loop requires is sooner than the current value.
$readvec
$writevec
$exceptvec
Scalar references to the reading, writing and exception bitvectors
$timeout
Scalar reference to the timeout value
$loop->post_select( $readvec, $writevec, $exceptvec )
This method checks the returned bitvectors from a "select" call, and calls any of the callbacks that are appropriate.
$readvec
$writevec
$exceptvec
Scalars containing the read-ready, write-ready and exception bitvectors
$count = $loop->loop_once( $timeout )
This method calls the "pre_select" method to prepare the bitvectors for a "select" syscall, performs it, then calls "post_select" to
process the result. It returns the total number of callbacks invoked by the "post_select" method, or "undef" if the underlying select(2)
syscall returned an error.
SEE ALSO
o IO::Select - OO interface to select system call
AUTHOR
Paul Evans <leonerd@leonerd.org.uk>
perl v5.14.2 2012-10-24 IO::Async::Loop::Select(3pm)