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Full Discussion: Format of 'select' generated menu
Top Forums Shell Programming and Scripting Format of 'select' generated menu Post 302897959 by edstevens on Thursday 17th of April 2014 09:00:55 AM
Old 04-17-2014
Quote:
Originally Posted by Corona688
The output of all of those looks readable, is the thing. Neither too many lines, nor too wide, to be visible. Not 100% consistent when you give it different options and configurations, but that's kind of the point -- it's a command that's designed to automatically format itself to be readable, and so far you haven't managed to make it not be so. What, exactly, is actually wrong?
Yes, it's all readable and usable. Yes, the different options produce different results and that is to be expected. As I've stated earlier in the thread, what I'm after is some real understanding of exactly what the interactions are and how they work. I'm trying to learn something usable from this experience. I'm not the kind of guy who simply accepts "here, use this code, it works in this case". I've always been driven to peel back the layers and understand why it works the way it does so that I can apply that knowledge appropriately to other situations.

So, I don't understand why
- with the default setting of COLUMNS, the list with a short literal ('None') presented as a single column, but with a longer literal ('None of the above') it presented in three columns.

- setting the value of COLUMNS to 20 caused the previous 3 column list to be presented as one column.

- echoing $COLUMNS from the command prompt produced a value (80), but echoing it from within the shell script called from the same command prompt resulted in what appears to be nulls. I would have expected (and all of my previous experience confirms) that the shell script would have inherited the entire environment from the calling process. So I would expect the default value of COLUMNS within the script to be the same as the value at the command prompt that called the script.
 

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LEARN ABOUT SUSE

ocf_heartbeat_oralsnr

OCF_HEARTBEAT_ORALSN(7) 					OCF resource agents					   OCF_HEARTBEAT_ORALSN(7)

NAME

       ocf_heartbeat_oralsnr - Manages an Oracle TNS listener

SYNOPSIS

       oralsnr [start | stop | status | monitor | validate-all | meta-data | methods]

DESCRIPTION

       Resource script for Oracle Listener. It manages an Oracle Listener instance as an HA resource.

SUPPORTED PARAMETERS

       sid
	   The Oracle SID (aka ORACLE_SID). Necessary for the monitor op, i.e. to do tnsping SID. (required, string, no default)

       home
	   The Oracle home directory (aka ORACLE_HOME). If not specified, then the SID should be listed in /etc/oratab. (optional, string, no
	   default)

       user
	   Run the listener as this user. (optional, string, no default)

       listener
	   Listener instance to be started (as defined in listener.ora). Defaults to LISTENER. (optional, string, no default)

SUPPORTED ACTIONS

       This resource agent supports the following actions (operations):

       start
	   Starts the resource. Suggested minimum timeout: 120.

       stop
	   Stops the resource. Suggested minimum timeout: 120.

       status
	   Performs a status check. Suggested minimum timeout: 60.

       monitor
	   Performs a detailed status check. Suggested minimum timeout: 30. Suggested interval: 10.

       validate-all
	   Performs a validation of the resource configuration. Suggested minimum timeout: 5.

       meta-data
	   Retrieves resource agent metadata (internal use only). Suggested minimum timeout: 5.

       methods
	   Suggested minimum timeout: 5.

EXAMPLE

       The following is an example configuration for a oralsnr resource using the crm(8) shell:

	   primitive example_oralsnr ocf:heartbeat:oralsnr 
	     params 
	       sid=string 
	     op monitor depth="0" timeout="30" interval="10"

SEE ALSO

       http://www.linux-ha.org/wiki/oralsnr_(resource_agent)

AUTHOR

       Linux-HA contributors (see the resource agent source for information about individual authors)

resource-agents 1.0.3						    07/05/2010						   OCF_HEARTBEAT_ORALSN(7)
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