giving options in shell scripts

[sumittyagi]

Hi All!
could you please guide me how to add an option to a shell script, and how to extract that option in the script.

For eg. if we give arguments to a script, then we get that argument by numbered variables in the script.
abc.sh xyz

here we will get the argument in the shell like:
firstArg=$1

But if I want to give an option with my script like:
abc.sh -d xyz

then how will I get that option, and will there be any change in the way I extract my argument.

like:
firstArg=($2 instead of $1)

and could option be captured in positional variables.
like:
opt=$1

Please guide me in this context.

Thanks a lot!

[numberwhun]

Hi All!
could you please guide me how to add an option to a shell script, and how to extract that option in the script.

For eg. if we give arguments to a script, then we get that argument by numbered variables in the script.
abc.sh xyz

here we will get the argument in the shell like:
firstArg=$1

But if I want to give an option with my script like:
abc.sh -d xyz

then how will I get that option, and will there be any change in the way I extract my argument.

like:
firstArg=($2 instead of $1)

and could option be captured in positional variables.
like:
opt=$1

Please guide me in this context.

Thanks a lot!

To begin with, we would really need to know what shell you are working with as there are more than one.

I think that this and this may help you though.

Regards,

Jeff

[sumittyagi]

To begin with, we would really need to know what shell you are working with as there are more than one.

I think that this and this may help you though.

Regards,

Jeff

Thanks numberwhun, the links you provided are really good.