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Top Forums Shell Programming and Scripting check file exist before execution Post 302629979 by rbatte1 on Wednesday 25th of April 2012 08:40:38 AM
Old 04-25-2012
Something like:-
Code:
if [ -f *.LOG ]
then
   for i in *.LOG
   do
      load
      move
   done
fi

.... might do it, however it's not really necessary. You have a loop based on the file name too. If there are no files, then the loop will not execute.
 

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IO::Async::Routine(3pm) 				User Contributed Perl Documentation				   IO::Async::Routine(3pm)

NAME
"IO::Async::Routine" - execute code in an independent sub-process SYNOPSIS
use IO::Async::Routine; use IO::Async::Channel; use IO::Async::Loop; my $loop = IO::Async::Loop->new; my $nums_ch = IO::Async::Channel->new; my $ret_ch = IO::Async::Channel->new; my $routine = IO::Async::Routine->new( channels_in => [ $nums_ch ], channels_out => [ $ret_ch ], code => sub { my @nums = @{ $nums_ch->recv }; my $ret = 0; $ret += $_ for @nums; # Can only send references $ret_ch->send( $ret ); }, on_finish => sub { say "The routine aborted early - $_[-1]"; $loop->stop; }, ); $loop->add( $routine ); $nums_ch->send( [ 10, 20, 30 ] ); $ret_ch->recv( on_recv => sub { my ( $ch, $totalref ) = @_; say "The total of 10, 20, 30 is: $$totalref"; $loop->stop; } ); $loop->run; DESCRIPTION
This subclass of IO::Async::Process contains a body of code and executes it in a sub-process, allowing it to act independently of the main program. Once set up, all communication with the code happens by values passed into or out of the Routine via IO::Async::Channel objects. Because the code running inside the Routine runs within its own process, it is isolated from the rest of the program, in terms of memory, CPU time, and other resources, and perhaps most importantly in terms of control flow. The code contained within the Routine is free to make blocking calls without stalling the rest of the program. This makes it useful for using existing code which has no option not to block within an "IO::Async"-based program. To create asynchronous wrappers of functions that return a value based only on their arguments, and do not generally maintain state within the process it may be more convenient to use an IO::Async::Function instead, which uses an "IO::Async::Routine" to contain the body of the function and manages the Channels itself. PARAMETERS
The following named parameters may be passed to "new" or "configure": channels_in => ARRAY of IO::Async::Channel ARRAY reference of "IO::Async::Channel" objects to set up for passing values in to the Routine. channels_out => ARRAY of IO::Async::Channel ARRAY reference of "IO::Async::Channel" objects to set up for passing values out of the Routine. code => CODE CODE reference to the body of the Routine, to execute once the channels are set up. METHODS
This class provides no additional methods, other than those provided by IO::Async::Process. AUTHOR
Paul Evans <leonerd@leonerd.org.uk> perl v5.14.2 2012-10-24 IO::Async::Routine(3pm)
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