Conoscere quanti parametri vengono passati ad uno script in BASH

Date 24 Aprile 2013 Author By SFSoft Category HowTo, Linux

Una chicca utile dal buon nixCraft, conoscere quanti parametri vengono passati ad uno script in bash:

#!/bin/bash
# Purpose: Demo bash function
# Author: nixCraft
# -----------------------------

## Define a function called foo()
foo(){
  echo "Function name:  ${FUNCNAME}"
  echo "The number of positional parameter : $#"
  echo "All parameters or arguments passed to the function: '$@'"
  echo
}

## Call or invoke the function ##
## Pass the parameters or arguments  ##
foo nixCraft
foo 1 2 3 4 5
foo "this" "is" "a" "test"

Questi i risultati a video:

Function name: foo
The number of positional parameter : 1
All parameters or arguments passed to the function: 'nixCraft'

Function name: foo
The number of positional parameter : 5
All parameters or arguments passed to the function: '1 2 3 4 5'

Function name: foo
The number of positional parameter : 4
All parameters or arguments passed to the function: ‘this is a test‘

http://www.cyberciti.biz/faq/unix-linux-bash-function-number-of-arguments-passed/

Tag: bash, howto, linux