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use local and $?

From: l_j_f
Subject: use local and $?
Date: Mon, 12 Jan 2015 17:23:53 +0800

1. bash version
-sh-4.3# bash --version
GNU bash, version 4.3.0(1)-release (arm-hisiv200-linux-gnu)
Copyright (C) 2013 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software; you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
2. the script
ok() {  
        echo ok  
error() {                                                
        echo error                                       
        return 1                                         
main() {                                                 
        local err                                        
        local a=$(ok); err=$?                            
        echo a=$a err=$err
        local b=$(error); err=$?
        echo b=$b err=$err
main "$@"
3. the result
-sh-4.3# ./test2.sh 
a=ok err=0
b=error err=0 #I think it should be "b=error err=1"


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