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Full Discussion: How to put output of one command into a variable
Top Forums Shell Programming and Scripting How to put output of one command into a variable Post 302409008 by joker_789us on Wednesday 31st of March 2010 03:28:16 AM
Old 03-31-2010
How to put output of one command into a variable
Hi,
Let say I have these 3 files (state, list and myscript). I want to be able get the sample output like below when I run myscript. Any one know how to fix the code? TIA.


~~~~~~~~~~~~~~~

Code:
> cat /home/state
CA
 
> cat /home/list
CA 100 50 20
AUS 120 61 10
 
> cat myscript
#!/bin/sh
st='cat /home/state'
grep $st /home/list
 
> ./myscript    # this is the output I want.
CA 100 50 20

Last edited by Franklin52; 03-31-2010 at 04:32 AM.. Reason: Please use code tags.
 

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LEARN ABOUT DEBIAN

amqp-consume

AMQP-CONSUME(1) 						 RabbitMQ C Client						   AMQP-CONSUME(1)

NAME

       amqp-consume - Consume messages from a queue on an AMQP server

SYNOPSIS

       amqp-consume [OPTION...] {command} [args...]

DESCRIPTION

       amqp-consume consumes messages from a queue on an AMQP server. For each message that arrives, a receiving command is run, with the message
       body supplied to it on standard input.

       amqp-consume can consume from an existing queue, or it can create a new queue. It can optionally bind the queue to an existing exchange.

       By default, messages will be consumed with explicit acknowledgements. A message will only be acknowledged if the receiving command exits
       successfully (i.e. with an exit code of zero). The AMQP "no ack" mode (a.k.a. auto-ack mode) can be enable with the -A option.

OPTIONS

       -q, --queue=queue name
	   The name of the queue to consume messages from.

	   If the --queue option is omitted, the AMQP server will assign a unique name to the queue, and that server-assigned name will be
	   dixsplayed on stderr; this case implies that an exclusive queue should be declared.

       -e, --exchange=exchange name
	   Specifies that an exclusive queue should be declared, and bound to the given exchange. The specified exchange should already exist
	   unless the --exchange-type option is used to request the creation of an exchange.

       -r, --routing-key=routing key
	   The routing key for binding. If omitted, an empty routing key is assumed.

       -d, --declare
	   Forces an exclusive queue to be declared, even when it otherwise would not be. That is, when a queue name is specified with the --queue
	   option, but no binding to an exchange is requested with the --exchange option.

       -A, --no-ack=routing key
	   Enable "no ack" mode: The AMQP server will unconditionally acknowledge each message that is delivered, regardless of whether the target
	   command exits successfully or not.

EXAMPLES

       Consume messages from an existing queue "myqueue", and output the message bodies on standard output via cat:

	       $ amqp-publish -q myqueue cat

       Bind a new exclusive queue to an exchange "myexch", and send each message body to the script myscript, automatically acknowledging them on
       the server:

	       $ amqp-consume -A -e myexch ./myscript

SEE ALSO

       librabbitmq-tools(7) describes connection-related options common to all the RabbitMQ C Client tools.

AUTHOR

       The RabbitMQ Team <info@rabbitmq.com>

RabbitMQ C Client						    2011-01-01							   AMQP-CONSUME(1)
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