i am on learning path of unix, and yet to discover many things. I came across with this requirement where i need to pass parameters but the position of parameters is not fixed so after doing some google search got to know "getopts" can handle that. So here is my code:
Code:
function show_help {
echo "Usage: ${0} -b [bankname] -r [region] -w [windowdate]"
echo ""
echo " -b: BankName"
echo " -r: Region"
echo " -w: Windowdate"
exit 0
}
# A POSIX variable
OPTIND=1 # Reset in case getopts has been used previously in the shell.
# set -x
# Get parameters from command line
while getopts "h?b:r:w:f" opt; do
case "$opt" in
b)
BankName=${OPTARG}
;;
r)
Region=${OPTARG}
;;
w)
WindowDate=${OPTARG}
;;
f)
FilePattern=${OPTARG}
;;
h|\?)
show_help
exit 0
;;
esac
done
shift $((OPTIND-1))
[ "$1" = "--" ] && shift
# If required variables aren't setup, show help and exit
unset MISSING_PARAM
if [[ -z ${BankName} ]]; then
MISSING_PARAM="${MISSING_PARAM} b"
fi
if [[ -z ${Region} ]]; then
MISSING_PARAM="${MISSING_PARAM} r"
fi
if [[ -z ${WindowDate} ]]; then
MISSING_PARAM="${MISSING_PARAM} w"
fi
#if [[ -z ${FilePattern} ]]; then
# MISSING_PARAM="${MISSING_PARAM} f"
#fi
if [[ -n ${MISSING_PARAM} ]]; then
echo "Error: Missing required parameter(s)"
for PARAM in ${MISSING_PARAM}; do
echo " -${PARAM}"
done
echo ""
show_help
exit 0
fi
well, now my requirement is i want to pass optional parameter, kindly note i am not talkin about optional arguments that i am aware of if i dont use ":" after any option it will accept optional argument for that option, but what i need is optional parameter.. so if i call my scripts like:
it does not show any parameter passed to option "-f" because there is no ":" after -f... what i want is out of 4 parameters 3 are mandatory but last one should be non-mandatory so, both should work i.e
There are many places where I can see the syntax description for optargs, which, usually boils down to this:
getopts OPTSTRING VARNAME
where:
OPTSTRING tells getopts which options to expect and where to expect arguments
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Hi,
Does the order of argument and non-argument command line parameters matter to getopts?
with a getopts line in my script of
getopts p:cs opt
a command line of <script> -p 5 -s
only picks up the -p option, while <script> -s -p 5 picks up both.
Removing the space between the p and the... (3 Replies)
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I have a script that search for a string in current or old zipped log file.
Im using a option something like this
${basename}
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In the below code
while getopts :rfw:d:s:a: options
do
case "$options" in
r) echo reverse;;
f) echo forward;;
w) window=$OPTARG;;
d) duration=$OPTARG;;
s) search=$OPTARG;;
a) value=$OPTARG;;
*) help; exit;;
esac
done
... (2 Replies)
Hello,
I have a shell script "Test.ksh" and I need to pass 8 parameters/arguments while executing the script
./Test.ksh 1 2 3 4 5 6 7 8
Out of these I want first 3 to be compulsory and rest 5 to be optional. Can you suggest the way to do this like and also how to pass these optional... (3 Replies)
Hi, this is my problem
I have script with two parameters -n name and -s surname. Both have arguments and I want to know how parse these parameters with getopts. When you write
./names -n John -s White
it find you all persons, which name is John White, but when you write
./names -n John ... (1 Reply)
Hello,
On Aix 5.2, we changed the parameters tcp_keepinit, tcp_keepintvl and tcp_keepidle with the no command.
tunrestore -R is present in inittab
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Hi,
I am trying to call a function inside a shell script. Is there a way in which I can make the parameters options in the call?
Please help me with this.
Thanks!!! (2 Replies)
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