I cannot seem to pass the value of the variable assigned in the "else" statment below to an "if" statement outside of the loop. When I debug using "set -x", I find that the value of "$A" is empty. Is there something I'm missing here? Code is below:
do
if ] then
echo "Good Match"... (2 Replies)
I have the following statement in script:
find ${LANDING_FILE_DIR}${BTIME_FILENAME_PATTERN2} -print | while read file; do
...
done
When there are no files located by the find comand it returns:
"find: bad status-- /home/rnitcher/test/....." to the command line
How do I get control in... (3 Replies)
Hi,
I have a strange problem and I'm sure its because I'm doing something stupid.
When I loop through all of the files in a directory they cannot be found.
Any help would be greatly appreciated.
Thanks,
-E
$ touch a.txt
$ touch b.txt
$ ls
a.txt b.txt
$ for f in `ls` ; do... (3 Replies)
Hi frnd , hv nice week ahead,
in shell script i found 2 words as below
1 ) targ_found=`sed -n \`echo $line_no\`p sesslog.txt | grep -ic 'Targ Rowid'`
2 ) bracket_found=`sed -n \`echo $line_no\`p sesslog.txt | grep -wc ')'`
now we got he line number of 2 words. now i want to... (1 Reply)
hi ,
I have certain files at the same path with differeent extensions like .dat , .txt etc ...........i need to rename them with extension .found at the same path with the help of loop....
also the files names will be like this ;
abc_2010_c1.dat
abc_2010_c2.dat
xyz_2010_c1.txt (2 Replies)
Hi All,
I have a simple script.sh file. It gives me " file.txt' for reading (no such file or directory)" Why can this happen?
%ls
ch1file.txt ch2file.txt ch3file.txt
% chmod +x script.sh
% bash
% ./script.sh
where script.sh is as follows
for i in seq(3)
do awk '{print $1}'... (1 Reply)
can any1 please tell me what is problem with following code:
i=1;
cat test| while read CMD;
do
Var$i=$CMD; or Var$i=$(echo $CMD) ;
let i++
doneI keep getting error :
line 4: Var1=sometext: command not found (2 Replies)
I am unable to use the value of a variable.
while ]
do
LstFldDataPart =`head -n "$LstFldDataPartCntr" "${FeedFileDir}/${FeedFileBadRecs}" | tail -1 | tr -d '\n'`
echo $LstFldDataPart
JndLstFldDataPart="${JndLstFldDataPart}${LstFldDataPart}"
LstFldDataPartCntr=... (3 Replies)
Hi, I have a control file which will contain all filenames(300) files. Loop through all the file names in the control files and check the existence of this file in another directory(same server). I need to infinitely(2 hrs) run this while loop until all the files are found. Once a file is found,... (5 Replies)
Dear Help,
Is it possible to continue the loop by going to the next available value, if the 'expected value' is not found. I have a list of values which might not get incremented by fixed value and hence the loop could break and the script could terminate.
Any suggestion is appreciated.
... (1 Reply)
Discussion started by: Indra2011
1 Replies
LEARN ABOUT DEBIAN
io::async::loop::poll
IO::Async::Loop::Poll(3pm) User Contributed Perl Documentation IO::Async::Loop::Poll(3pm)NAME
"IO::Async::Loop::Poll" - use "IO::Async" with "poll(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 an "IO::Poll" object.
use IO::Poll;
use IO::Async::Loop::Poll;
my $poll = IO::Poll->new;
my $loop = IO::Async::Loop::Poll->new( poll => $poll );
$loop->add( ... );
while(1) {
my $timeout = ...
my $ret = $poll->poll( $timeout );
$loop->post_poll;
}
DESCRIPTION
This subclass of "IO::Async::Loop" uses an "IO::Poll" object to perform read-ready and write-ready tests.
To integrate with existing code that uses an "IO::Poll", a "post_poll" can be called immediately after the "poll" method on the contained
"IO::Poll" object. The appropriate mask bits are maintained on the "IO::Poll" object when notifiers are added or removed from the set, or
when they change their "want_writeready" status. The "post_poll" method inspects the result bits and invokes the "on_read_ready" or
"on_write_ready" methods on the notifiers.
CONSTRUCTOR
$loop = IO::Async::Loop::Poll->new( %args )
This function returns a new instance of a "IO::Async::Loop::Poll" object. It takes the following named arguments:
"poll" The "IO::Poll" object to use for notification. Optional; if a value is not given, a new "IO::Poll" object will be constructed.
METHODS
$count = $loop->post_poll( $poll )
This method checks the returned event list from a "IO::Poll::poll" call, and calls any of the notification methods or callbacks that are
appropriate. It returns the total number of callbacks that were invoked; that is, the total number of "on_read_ready" and "on_write_ready"
callbacks for "watch_io", and "watch_time" event callbacks.
$poll Reference to the "IO::Poll" object
$count = $loop->loop_once( $timeout )
This method calls the "poll" method on the stored "IO::Poll" object, passing in the value of $timeout, and then runs the "post_poll" method
on itself. It returns the total number of callbacks invoked by the "post_poll" method, or "undef" if the underlying "poll" method returned
an error.
AUTHOR
Paul Evans <leonerd@leonerd.org.uk>
perl v5.14.2 2012-10-24 IO::Async::Loop::Poll(3pm)