[NTLUG:Discuss] bash script - function { } doesn't see command line options..

[Chris Cox]

Richard Geoffrion wrote:
> Take this test script, for example:
> 
> #!/bin/bash
> function one () {
>         echo I see one parameter and it is $1
> }
> function two () {
>         echo I see two parameters, $1 and $2
> }
> if  [ -z $2 ] ; then
>         one
> else
>         two
> fi
> 
> 
> 
> Then call the script with either one or two parameters.  I see that the 
> logic is working but the functions themselves are not getting the 
> scripts $1 variables passed through to the functions.  My results were....

You didn't pass any arguments to the functions.

Try:

if [ -z $2 ]; then
	one "$1"
else
	two "$1" "$2"
fi


> 
> $  ./func 1
> I see one paramater and it is
> 
> $ ./func 2
> I see two parameters,  and
> 
> 
> I've tried
> 
> function one {
> function one() {
> function one () {
> one {
> one() {
> one () {
> 
> 
> NONE of those attempts were the correct syntax nor could I find any 
> functional difference with the syntax in the above examples. I can't 
> find any working examples  to pass the command line variables to the 
> functions.
> 
> For the moment I've taken to passing command line variables to the 
> function calls when I call them....as like here.
> 
> 
> #!/bin/bash
> function one () {
>         echo I see one parameter and it is $1
> }
> function two () {
>         echo I see two parameters, $1 and $2
> }
> if  [ -z $2 ] ; then
>         one $@
> else
>         two $@
> fi
> 
> 
> Is there a better way to accomplish what I'm trying to do?
>