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Full Discussion: need to read lines in file and compare value in if not working
Top Forums Shell Programming and Scripting need to read lines in file and compare value in if not working Post 302475162 by script_op2a on Friday 26th of November 2010 07:39:28 PM
Old 11-26-2010
need to read lines in file and compare value in if not working
Hello,

I have this file that sometime contains 0 lines and sometimes 1 or more.

It's supposed to then put the result (could be 0 or 1 or 2 or more) into a variable.

Then it's supposed to echo using an if else statement depending on the value of the variable.
Code:
flagvar='wc -l $tempfile | awk '{print $1}''

if [ $flagvar != "0" ]; then
   echo $flagvar
else
   echo "the file does not have rows"
fi

The problem is that the tempfile contains 2 rows and it always echoes that
"the file does no have rows."

I've tried $flagvar != "0", I'm wondering if the condition should be a string since the result is printed from awk. (if the "0" is correct).. it I just used the value 0 without the quotes this would just be like $flagvar!=true which is not equal to true.
Last edited by Scott; 11-27-2010 at 06:53 AM.. Reason: Code tags, please...
 

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LEARN ABOUT DEBIAN

rabbitmq-env.conf

RABBITMQ-ENV.CONF(5)						  RabbitMQ Server					      RABBITMQ-ENV.CONF(5)

NAME

       rabbitmq-env.conf - default settings for RabbitMQ AMQP server

DESCRIPTION

       /etc/rabbitmq/rabbitmq-env.conf contains variable settings that override the defaults built in to the RabbitMQ startup scripts.

       The file is interpreted by the system shell, and so should consist of a sequence of shell environment variable definitions. Normal shell
       syntax is permitted (since the file is sourced using the shell "." operator), including line comments starting with "#".

       In order of preference, the startup scripts get their values from the environment, from /etc/rabbitmq/rabbitmq-env.conf and finally from
       the built-in default values. For example, for the RABBITMQ_NODENAME setting,

       RABBITMQ_NODENAME

       from the environment is checked first. If it is absent or equal to the empty string, then

       NODENAME

       from /etc/rabbitmq/rabbitmq-env.conf is checked. If it is also absent or set equal to the empty string then the default value from the
       startup script is used.

       The variable names in /etc/rabbitmq/rabbitmq-env.conf are always equal to the environment variable names, with the RABBITMQ_ prefix
       removed: RABBITMQ_NODE_PORT from the environment becomes NODE_PORT in the /etc/rabbitmq/rabbitmq-env.conf file, etc.

       # I am a complete /etc/rabbitmq/rabbitmq-env.conf file.
       # Comment lines start with a hash character.
       # This is a /bin/sh script file - use ordinary envt var syntax
       NODENAME=hare

SEE ALSO

       rabbitmq-server(1) rabbitmqctl(1)

EXAMPLES

       # I am a complete /etc/rabbitmq/rabbitmq-env.conf file.
       # Comment lines start with a hash character.
       # This is a /bin/sh script file - use ordinary envt var syntax
       NODENAME=hare

       This is an example of a complete /etc/rabbitmq/rabbitmq-env.conf file that overrides the default Erlang node name from "rabbit" to "hare".

AUTHOR

       The RabbitMQ Team <info@rabbitmq.com>

RabbitMQ Server 						    06/22/2012						      RABBITMQ-ENV.CONF(5)
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