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Top Forums Shell Programming and Scripting SSH in batch mode and File-Handles in a loop Post 302112476 by DaveCutler on Wednesday 28th of March 2007 08:11:40 AM
Old 03-28-2007
SSH in batch mode and File-Handles in a loop

Hi all
I try to execute SSH commands on several hosts in a while-loop.

There seems to be a problem with file-handle, first cycle works correct but no other one will follow due to the while condition is false even that there are many more host entries (lines) in all_hosts.dat.

#!/usr/bin/ksh
exec 0<all_hosts.dat
while read line
do
echo "...executing on host :" $line
ssh $line 'ls -la /tmp' # execution aborts after the first cycle
###pwd | ssh $line 'ls -la /tmp' # continues for each entry of all_hosts.dat
done # <all_hosts.dat
#


Any clue?
Any pointer to explaining tutorials about file handles?


MTIA

Dave
 

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Courier::Filter::Logger::IOHandle(3pm)			User Contributed Perl Documentation		    Courier::Filter::Logger::IOHandle(3pm)

NAME
Courier::Filter::Logger::IOHandle - I/O handle logger for the Courier::Filter framework SYNOPSIS
use Courier::Filter::Logger::IOHandle; my $logger = Courier::Filter::Logger::IOHandle->new( handle => $handle ); # For use in an individual filter module: my $module = Courier::Filter::Module::My->new( ... logger => $logger, ... ); # For use as a global Courier::Filter logger object: my $filter = Courier::Filter->new( ... logger => $logger, ... ); DESCRIPTION
This class is an I/O handle logger class for use with Courier::Filter and its filter modules. Constructor The following constructor is provided: new(%options): returns Courier::Filter::Logger::IOHandle Creates a new logger that logs messages as lines to an I/O handle. %options is a list of key/value pairs representing any of the following options: handle Required. The I/O handle or IO::Handle object to which log messages should be written. timestamp A boolean value controlling whether every log message line should be prefixed with a timestamp (in local time, in ISO format). Defaults to false. Instance methods The following instance methods are provided: log_error($text): throws Perl exceptions Logs the error message given as $text (a string which may contain newlines). Prefixes each line with a timestamp if the "timestamp" option has been set through the constructor. log_rejected_message($message, $reason): throws Perl exceptions Logs the Courier::Message given as $message as having been rejected due to $reason (a string which may contain newlines). SEE ALSO
Courier::Filter::Logger, Courier::Filter::Overview. For AVAILABILITY, SUPPORT, and LICENSE information, see Courier::Filter::Overview. AUTHOR
Julian Mehnle <julian@mehnle.net> perl v5.14.2 2011-12-27 Courier::Filter::Logger::IOHandle(3pm)
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