zsh 呼び出し元のfunction名を取得する

https://stackoverflow.com/questions/31426565/get-name-of-calling-function-in-zsh

function a(){
    c
}
 
function b(){
    c
}
 
function c(){
     #if a call me; then...
     #if b call me; then...
}

bash

• ${FUNCNAME[1]} is a (caller name)
• ${FUNCNAME[0]} is c (current name)

zsh

$funcstack

• ${funcstack[2]} is a (caller name)
• ${funcstack[1]} is c (current name)