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Full Discussion: How to handle scripts that expect an input
Top Forums Shell Programming and Scripting How to handle scripts that expect an input Post 302413027 by ladyAnne on Wednesday 14th of April 2010 09:47:40 AM
Old 04-14-2010
How to handle scripts that expect an input
Hi

I would like to know how to handle my script that expects an input when calling the script and the user doesn't enter anything, I need to re-direct to my helpfile.

Bascically here is my script:

Code:
 
#!/bin/bash
 
csvdir="/var/local/dsx/csv/general"
csvfile="$csvdir/$csvfile"
dsxdir="/var/local/dsx/import"
dsxfile="$dsxdir/$dsxfile"
 
function displayHelp()
{
echo ""
echo " Usage: ./Import_PlannedCELL.sh [ -c -d ]"
echo ""
echo " -c, --csvfile identified by the input file in csv format "
echo " -d, --dsxfile identified by the output file in dsx format "
echo " -h, --help identified by the help menu "
echo ""

}
 
while getopts " c: d: h " option
do
case $option in
c ) csvfile="$OPTARG";;
d ) dsxfile="$OPTARG";;
h | ? | * ) displayHelp;exit;;

esac;
done
cat $csvdir/$csvfile | csvdsx -ePlanned \
-iCell:CELLID \
-cCells%BTS:SITEID^Cell:CELLID \
-sCell:CELLID \
-xCELLID,SITEID \
->$dsxdir/$dsxfile

if the user enters :

Code:
./script


instead of :

Code:
./script -h

how can i call my help function

I though this will help:

Code:
h | ? | * ) displayHelp;exit;;

but it only calls the help if I enter anything other than the specified getops options.

I need it to work also for whitespaces.

This is what I get when I try without a character:

Code:
$ ./import.sh
Warning: program compiled against libxml 207 using older 206
I/O warning : failed to load external entity "/var/local/dsx/import//var/local/dsx/import/"
failed to parse new file /var/local/dsx/import//var/local/dsx/import/

It is reading the file anyway

Thank you kindly for your help
 

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LEARN ABOUT CENTOS

service

service(8)						      System Manager's Manual							service(8)

NAME

       service - run a System V init script

SYNOPSIS

       service SCRIPT COMMAND [OPTIONS]

       service --status-all

       service --help | -h | --version

DESCRIPTION

       service runs a System V init script in as predictable environment as possible, removing most environment variables and with current working
       directory set to /.

       The SCRIPT parameter specifies a System V init script, located in /etc/init.d/SCRIPT.  The  supported  values  of  COMMAND  depend  on  the
       invoked	script,  service  passes  COMMAND and OPTIONS it to the init script unmodified.  All scripts should support at least the start and
       stop commands.  As a special case, if COMMAND is --full-restart, the script is run twice, first with the stop command, then with the  start
       command.

       service --status-all runs all init scripts, in alphabetical order, with the status command.

       If the init script file does not exist, the script tries to use legacy actions.	If there is no suitable legacy action found and COMMAND is
       one of actions specified in LSB Core Specification, input is redirected to the systemctl.  Otherwise the command fails with return code 2.

FILES

       /etc/init.d
	      The directory containing System V init scripts.

ENVIRONMENT

       LANG, TERM
	      The only environment variables passed to the init scripts.

SEE ALSO

       chkconfig(8), ntsysv(8), systemd(1), systemctl(8), systemd.service(5)

								     Jan 2006								service(8)
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