[Bug 7694] New: Pushing python to the background causes shell to become unusable

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=7694

           Summary: Pushing python to the background causes shell to
                    become unusable
           Product: Busybox
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: minor
          Priority: P5
         Component: Standard Compliance
        AssignedTo: unassigned at busybox.net
        ReportedBy: chen_chun_guang at 163.com
                CC: busybox-cvs at busybox.net
   Estimated Hours: 0.0


Created attachment 5780
  --> https://bugs.busybox.net/attachment.cgi?id=5780
Reproduce setps in the yocto environment

Pushing python to the background in Yocto system by pressing Ctrl-Z causes the
shell terminal to become unusable.

Reproduce steps:
1. Setup Yocto 1.7 Environment by following below link:
http://www.yoctoproject.org/docs/current/yocto-project-qs/yocto-project-qs.html

2. Launch Yocto by executing command:
 runqemu qemux86

3. Change default shell 
   Yocto shell default point to "bash", Just changing soft link and point to
busybox.nosuid by command:
sh-4.2#ln -sf /bin/bushbox.nosuid /bin/sh
sh-4.2#sh          ( Change default shell to busybox )
~#
4. Run python and pressing "Ctrl-Z" to pushing python to the background
~#python
Python 2.7.3 (default, May 21 2014, 15:09:26)
[GCC 4.8.1] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>>
>>>
Press 'Ctrl-Z'
>>>
[1]+ Stopped python

Shell become unusable and no response after pushing python to background.

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