dbshell error handling

[Étienne BERSAC]

Hi,

The Django project made great improvements in batch mode for dbshell with password managment. That's a nice contribution !

For scripting, commands should return a non zero exit-code on error. But runshell seems to miss to manage exit code. Here is how to reproduce:

(venv) $ echo 'auieaui;' | django-admin dbshell
ERROR:  syntax error at or near "auieaui"
LINE 1: auieaui;
        ^
(venv) $ echo $?
0

I suggested a fix in ​https://github.com/django/django/pull/6768 . @charettes asked me to open a ticket for discussion. Here your are :)

Regards,
Étienne