function does not contain a return statement, its status is set based on the status of the last statement executed in the function. To actually return arbitrary values to the caller you must use other mechanisms
/bin/bashJAIL="/nginx"HINT=""# Do three possibilities for $JAIL ##for i in 1 2 3 docase $i in1) JAIL="/nginx/jail"; HINT="value set";;2) JAIL=""; HINT="value set to empty string";;3) unset JAIL; HINT="\$JAIL unset";;esac ### Update user with actual values and acti...
Bash cannot return values, whether a single value or an array, but it can return a status (the same as other programs). However, there are multiple turnarounds that we can use to return an array from a function. Let’s explore them below. Using nameref Feature To return the entire ar...
How to Declare and Call a Function? A function does not execute when declared. The function's body executes when invoked after declaration. Follow the steps below to create a bash script with various syntax options: 1. Using your favorite text editor, create a shell script calledsyntax. If ...
A bash function is a method used in shell scripts to group reusable code blocks. This feature is available for most programming languages, known under different names such as procedures, methods, or subroutines. This article provides a complete overview of bash functions, how they work, and how...
What is a bash function? How to define and use functions in Bash? Function Variables Function Arguments Function Return How to delete a function? Nested Functions How to debug a bash function? Get an existing function definition Tracing code with traps Find where a bash function is defined ...
On lines 33-35, I wait for the scp task to finish, get the return code, and if it's an error, abort. On line 37, I check that the file could be parsed, otherwise, I exit with an error.So how does the error handling look now?Visiting...
When to use double quotes with Bash Arrays? Array Operations How to iterate over a Bash Array? (loop) How to get the Key/Value pair of a Bash Array? (Obtain Keys or Indices) How to get a Bash Array size? (Array length) How to remove a key from a Bash Array or delete the full...
Here, after the function was executed, our variablenumberremains untouched. This way, we also evade the return value limitation. BTW, a crude way of getting past the exit code in BASH is to use negative values. Linux, as the operating system, uses exit value 0 as the sign of successful...
That tells us that there’s no hidden users on this mac. How so? Because if there were it would return something very different, like this: We can see not only the list of hidden users, but also that the preference for hiding users has been set to ‘1’ (in plist syntax, ‘1’ ...