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Full Discussion: Code optimization
Top Forums Shell Programming and Scripting Code optimization Post 303018763 by MadeInGermany on Thursday 14th of June 2018 12:44:59 PM
Old 06-14-2018
Simply break the loop if ORACLE_SID got a value!
(You do not need to check the boundaries. Imagine you have 10+ items...)
Code:
#!/bin/bash
R=$'\e[0;31m'
N=$'\e[0m'

OPTIONS=(
 db_a db_b db_c db_g
 db_o db_e db_k db_t
)
PS3=$'\n'"${R}Choose database ${N}"

select ORACLE_SID in "${OPTIONS[@]}"
do
  [[ -n $ORACLE_SID ]] && break
  printf "${R}Invalid number!${N}\n"
done

#^D pressed?
[[ -n $ORACLE_SID ]] || exit

export ORACLE_SID HOST=${ORACLE_SID}_qa
echo "HOST=$HOST"

These 2 Users Gave Thanks to MadeInGermany For This Post:
primo102 Scrutinizer
 

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LEARN ABOUT DEBIAN

ql-set-cmd-timeout

ql-set-cmd-timeout(8)					       System Administration					     ql-set-cmd-timeout(8)

NAME

       ql-set-cmd-timeout - set the timeout on the devices connected to the QLogic FC HBA.

SYNOPSIS

       ql-set-cmd-timeout [OPTIONS]

DESCRIPTION

       QLogic Linux Set Device Timeout Utility

       This  utility allows you to set the timeout on the devices connected to the QLogic FC HBA.  This timeout value applies to the commands sent
       to the device. This can help when target devices take longer to execute a command, for example under heavy I/O. Setting	a  longer  timeout
       reduces the chance of the Linux SCSI mid-layer driver aborting the tasks after a timeout.

	      [DEFAULT]

	      Display timeout of devices connected to all HOSTs

	      [HOST]

	      Display timeout of devices connected to HOST

	      [HOST] [TARGET]

	      Display timeout of devices connected to a TARGET on HOST

	      [HOST] [TARGET] [TIMEOUT]

	      To set timeout on devices connected to a TARGET on HOST

       -h,  --help, ?
	      Prints this help message

       -i,  --interactive
	      Use this option to use the menu driven program

SEE ALSO

       ql-dynamic-tgt-lun-disc(8), ql-lun-state-online(8), ql-hba-snapshot(8)

Matthias Schmitz <;matthias@sigxcpu.org> 			    August 2008 					     ql-set-cmd-timeout(8)
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