mirror of
https://github.com/ansible-collections/community.general.git
synced 2024-09-14 20:13:21 +02:00
240 lines
9 KiB
Python
240 lines
9 KiB
Python
# Copyright 2012, Tim Bielawa <tbielawa@redhat.com>
|
|
#
|
|
# This file is part of Ansible
|
|
#
|
|
# Ansible is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# Ansible is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
|
|
from __future__ import (absolute_import, division, print_function)
|
|
__metaclass__ = type
|
|
|
|
import datetime
|
|
import signal
|
|
import termios
|
|
import time
|
|
import tty
|
|
|
|
from os import isatty
|
|
from ansible.errors import AnsibleError
|
|
from ansible.module_utils.six import PY3
|
|
from ansible.module_utils._text import to_text
|
|
from ansible.plugins.action import ActionBase
|
|
|
|
try:
|
|
from __main__ import display
|
|
except ImportError:
|
|
from ansible.utils.display import Display
|
|
display = Display()
|
|
|
|
|
|
class AnsibleTimeoutExceeded(Exception):
|
|
pass
|
|
|
|
|
|
def timeout_handler(signum, frame):
|
|
raise AnsibleTimeoutExceeded
|
|
|
|
|
|
class ActionModule(ActionBase):
|
|
''' pauses execution for a length or time, or until input is received '''
|
|
|
|
PAUSE_TYPES = ['seconds', 'minutes', 'prompt', 'echo', '']
|
|
BYPASS_HOST_LOOP = True
|
|
|
|
def run(self, tmp=None, task_vars=None):
|
|
''' run the pause action module '''
|
|
if task_vars is None:
|
|
task_vars = dict()
|
|
|
|
result = super(ActionModule, self).run(tmp, task_vars)
|
|
|
|
duration_unit = 'minutes'
|
|
prompt = None
|
|
seconds = None
|
|
echo = True
|
|
echo_prompt = ''
|
|
result.update(dict(
|
|
changed=False,
|
|
rc=0,
|
|
stderr='',
|
|
stdout='',
|
|
start=None,
|
|
stop=None,
|
|
delta=None,
|
|
echo=echo
|
|
))
|
|
|
|
if not set(self._task.args.keys()) <= set(self.PAUSE_TYPES):
|
|
result['failed'] = True
|
|
result['msg'] = "Invalid argument given. Must be one of: %s" % ", ".join(self.PAUSE_TYPES)
|
|
return result
|
|
|
|
# Should keystrokes be echoed to stdout?
|
|
if 'echo' in self._task.args:
|
|
echo = self._task.args['echo']
|
|
if not type(echo) == bool:
|
|
result['failed'] = True
|
|
result['msg'] = "'%s' is not a valid setting for 'echo'." % self._task.args['echo']
|
|
return result
|
|
|
|
# Add a note saying the output is hidden if echo is disabled
|
|
if not echo:
|
|
echo_prompt = ' (output is hidden)'
|
|
|
|
# Is 'prompt' a key in 'args'?
|
|
if 'prompt' in self._task.args:
|
|
prompt = "[%s]\n%s%s:" % (self._task.get_name().strip(), self._task.args['prompt'], echo_prompt)
|
|
else:
|
|
# If no custom prompt is specified, set a default prompt
|
|
prompt = "[%s]\n%s%s:" % (self._task.get_name().strip(), 'Press enter to continue', echo_prompt)
|
|
|
|
# Are 'minutes' or 'seconds' keys that exist in 'args'?
|
|
if 'minutes' in self._task.args or 'seconds' in self._task.args:
|
|
try:
|
|
if 'minutes' in self._task.args:
|
|
# The time() command operates in seconds so we need to
|
|
# recalculate for minutes=X values.
|
|
seconds = int(self._task.args['minutes']) * 60
|
|
else:
|
|
seconds = int(self._task.args['seconds'])
|
|
duration_unit = 'seconds'
|
|
|
|
except ValueError as e:
|
|
result['failed'] = True
|
|
result['msg'] = u"non-integer value given for prompt duration:\n%s" % to_text(e)
|
|
return result
|
|
|
|
########################################################################
|
|
# Begin the hard work!
|
|
|
|
start = time.time()
|
|
result['start'] = to_text(datetime.datetime.now())
|
|
result['user_input'] = b''
|
|
|
|
fd = None
|
|
old_settings = None
|
|
try:
|
|
if seconds is not None:
|
|
if seconds < 1:
|
|
seconds = 1
|
|
|
|
# setup the alarm handler
|
|
signal.signal(signal.SIGALRM, timeout_handler)
|
|
signal.alarm(seconds)
|
|
|
|
# show the timer and control prompts
|
|
display.display("Pausing for %d seconds%s" % (seconds, echo_prompt))
|
|
display.display("(ctrl+C then 'C' = continue early, ctrl+C then 'A' = abort)\r"),
|
|
|
|
# show the prompt specified in the task
|
|
if 'prompt' in self._task.args:
|
|
display.display(prompt)
|
|
|
|
else:
|
|
display.display(prompt)
|
|
|
|
# save the attributes on the existing (duped) stdin so
|
|
# that we can restore them later after we set raw mode
|
|
fd = None
|
|
try:
|
|
if PY3:
|
|
stdin = self._connection._new_stdin.buffer
|
|
else:
|
|
stdin = self._connection._new_stdin
|
|
fd = stdin.fileno()
|
|
except (ValueError, AttributeError):
|
|
# ValueError: someone is using a closed file descriptor as stdin
|
|
# AttributeError: someone is using a null file descriptor as stdin on windoez
|
|
stdin = None
|
|
if fd is not None:
|
|
if isatty(fd):
|
|
old_settings = termios.tcgetattr(fd)
|
|
tty.setraw(fd)
|
|
|
|
# Enable a few things turned off by tty.setraw()
|
|
# ICANON -> Allows characters to be deleted and hides things like ^M.
|
|
# ICRNL -> Makes the return key work when ICANON is enabled, otherwise
|
|
# you get stuck at the prompt with no way to get out of it.
|
|
# See man termios for details on these flags
|
|
if not seconds:
|
|
new_settings = termios.tcgetattr(fd)
|
|
new_settings[0] = new_settings[0] | termios.ICRNL
|
|
new_settings[3] = new_settings[3] | termios.ICANON
|
|
termios.tcsetattr(fd, termios.TCSANOW, new_settings)
|
|
|
|
if echo:
|
|
# Enable ECHO since tty.setraw() disables it
|
|
new_settings = termios.tcgetattr(fd)
|
|
new_settings[3] = new_settings[3] | termios.ECHO
|
|
termios.tcsetattr(fd, termios.TCSANOW, new_settings)
|
|
|
|
# flush the buffer to make sure no previous key presses
|
|
# are read in below
|
|
termios.tcflush(stdin, termios.TCIFLUSH)
|
|
while True:
|
|
try:
|
|
if fd is not None:
|
|
key_pressed = stdin.read(1)
|
|
|
|
if seconds:
|
|
if key_pressed == b'\x03':
|
|
raise KeyboardInterrupt
|
|
|
|
if not seconds:
|
|
if fd is None or not isatty(fd):
|
|
display.warning("Not waiting from prompt as stdin is not interactive")
|
|
break
|
|
# read key presses and act accordingly
|
|
if key_pressed in (b'\r', b'\n'):
|
|
break
|
|
else:
|
|
result['user_input'] += key_pressed
|
|
|
|
except KeyboardInterrupt:
|
|
if seconds is not None:
|
|
signal.alarm(0)
|
|
display.display("Press 'C' to continue the play or 'A' to abort \r"),
|
|
if self._c_or_a(stdin):
|
|
break
|
|
else:
|
|
raise AnsibleError('user requested abort!')
|
|
|
|
except AnsibleTimeoutExceeded:
|
|
# this is the exception we expect when the alarm signal
|
|
# fires, so we simply ignore it to move into the cleanup
|
|
pass
|
|
finally:
|
|
# cleanup and save some information
|
|
# restore the old settings for the duped stdin fd
|
|
if not(None in (fd, old_settings)) and isatty(fd):
|
|
termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
|
|
|
|
duration = time.time() - start
|
|
result['stop'] = to_text(datetime.datetime.now())
|
|
result['delta'] = int(duration)
|
|
|
|
if duration_unit == 'minutes':
|
|
duration = round(duration / 60.0, 2)
|
|
else:
|
|
duration = round(duration, 2)
|
|
result['stdout'] = "Paused for %s %s" % (duration, duration_unit)
|
|
|
|
result['user_input'] = to_text(result['user_input'], errors='surrogate_or_strict')
|
|
return result
|
|
|
|
def _c_or_a(self, stdin):
|
|
while True:
|
|
key_pressed = stdin.read(1)
|
|
if key_pressed.lower() == b'a':
|
|
return False
|
|
elif key_pressed.lower() == b'c':
|
|
return True
|