try catch in bash

catch.sh

#!/bin/bash


function try()
{
  if [ -n "$CATCHED_ERROR" ] ; then return ; fi
  CATCHED_ERROR=''
  CATCHED_ERROR_LINE=$1
  TRY_ERROR_FILE=/tmp/try_error.$$

  shift
  eval $* 2>$TRY_ERROR_FILE

  CATCHED_ERROR=`cat $TRY_ERROR_FILE`
  rm -f $TRY_ERROR_FILE
}

function catch()
{
  if [ -n "$CATCHED_ERROR" ] ; then
  ┆ eval $*
  fi
}


try $LINENO echo 'this one work'
try $LINENO ls /non_existing_path
try $LINENO echo 'should not display this'
catch 'echo "Error when listing on line $CATCHED_ERROR_LINE: $CATCHED_ERROR" >&2'