Call Stack Info

Function Call Stack

$FUNCNAME is a builtin array variable stores every function name on the execution context.

• ${FUNCNAME[0]}: current function name
• ${FUNCNAME[1]}: name of the caller of current function
• ${FUNCNAME[2]}: name of caller of caller
• ...

err() {
   # print error with caller name info to your message
   echo -e "${FUNCNAME[1]}: error happened"
}

Script Call Stack

$BASH_SOURCE is a builtin array variable contains script paths most recently sourced.

TIP

It's the best practice to prefer ${BASH_SOURCE[0]} over $0 as the latter is always the path of the very first script being sourced on invocation, instead of path of the current script.

Line Number

$BASH_LINENO is a builtin array variable contains most recent line numbers the caller function was invoked.