Description of problem:

ovirt-shell cannot run in crontab


Version-Release number of selected component (if applicable):

OVirt 3.4.2


How reproducible:

100%


Steps to Reproduce:

1. create script with ovirt-shell e.g. 
/usr/bin/ovirt-shell -c -E "list vms --show-all" > /dumps/vms.dump

2. implement script into crontab

Actual results:

dump:

Traceback (most recent call last):
  File "/usr/bin/ovirt-shell", line 9, in <module>
    load_entry_point('ovirt-shell==3.4.0.5', 'console_scripts', 'ovirt-shell')()
  File "/usr/lib/python2.6/site-packages/ovirtcli/main.py", line 27, in main
    context = OvirtCliExecutionContext(sys.argv, parser)
  File "/usr/lib/python2.6/site-packages/ovirtcli/infrastructure/context.py", line 47, in __init__
    super(OvirtCliExecutionContext, self).__init__(args=args, option_parser=option_parser)
  File "/usr/lib/python2.6/site-packages/cli/context.py", line 73, in __init__
    self.terminal = create(self.Terminal)
  File "/usr/lib/python2.6/site-packages/cli/object.py", line 26, in create
    obj = cls(sys.stdin, sys.stdout, sys.stderr, **kwargs)
  File "/usr/lib/python2.6/site-packages/cli/platform/posix/terminal.py", line 36, in __init__
    self._tty = os.open('/dev/tty', os.O_RDWR)
OSError: [Errno 6] No such device or address: '/dev/tty'
Traceback (most recent call last):
  File "/usr/bin/ovirt-shell", line 9, in <module>
    load_entry_point('ovirt-shell==3.4.0.5', 'console_scripts', 'ovirt-shell')()
  File "/usr/lib/python2.6/site-packages/ovirtcli/main.py", line 27, in main
    context = OvirtCliExecutionContext(sys.argv, parser)
  File "/usr/lib/python2.6/site-packages/ovirtcli/infrastructure/context.py", line 47, in __init__
    super(OvirtCliExecutionContext, self).__init__(args=args, option_parser=option_parser)
  File "/usr/lib/python2.6/site-packages/cli/context.py", line 73, in __init__
    self.terminal = create(self.Terminal)
  File "/usr/lib/python2.6/site-packages/cli/object.py", line 26, in create
    obj = cls(sys.stdin, sys.stdout, sys.stderr, **kwargs)
  File "/usr/lib/python2.6/site-packages/cli/platform/posix/terminal.py", line 36, in __init__
    self._tty = os.open('/dev/tty', os.O_RDWR)
OSError: [Errno 6] No such device or address: '/dev/tty'


Expected results:

ovirt-shell should run as expected