Add echo option to pause module (#32205)
* Enable ECHO in prompt module Fixes #14160 * Add option for controlling echo behavior with pause module * Improve option logic Allow all options to be used in varying combinations, rather than being mutually exclusive. Always capture output and return it, even when a time limit is set. * Add version_added to docs * Improve behavior of echo output Set a few more flags to allow interactive deletion and hide control characters. Do not capture or echo input when a time is set. Tried to get this working nicely, but ran into too many issues/oddities to keep it. Maybe in the future if there is demand for capturing/echoing input when a time is set I'll take another pass at it.
This commit is contained in:
Sam Doran
Brian Coca
parent
6ce3972f21
commit
e65045f51f
2 changed files with 67 additions and 23 deletions
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@ -40,10 +40,19 @@ options:
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- Optional text to use for the prompt message.
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required: false
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default: null
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echo:
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description:
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- Contols whether or not keyboard input is shown when typing.
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- Has no effect if 'seconds' or 'minutes' is set.
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required: false
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default: 'yes'
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choices: ['yes', 'no']
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version_added: 2.5
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author: "Tim Bielawa (@tbielawa)"
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notes:
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- Starting in 2.2, if you specify 0 or negative for minutes or seconds, it will wait for 1 second, previously it would wait indefinitely.
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- This module is also supported for Windows targets.
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- User input is not captured or echoed, regardless of echo setting, when minutes or seconds is specified.
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'''
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EXAMPLES = '''
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@ -57,6 +66,11 @@ EXAMPLES = '''
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# A helpful reminder of what to look out for post-update.
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- pause:
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prompt: "Make sure org.foo.FooOverload exception is not present"
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# Pause to get some sensitive input.
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- pause:
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prompt: "Enter a secret"
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echo: no
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'''
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RETURN = '''
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@ -85,4 +99,9 @@ stdout:
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returned: always
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type: string
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sample: Paused for 0.04 minutes
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echo:
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description: Value of echo setting
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returned: always
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type: bool
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sample: true
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'''
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@ -47,7 +47,7 @@ def timeout_handler(signum, frame):
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class ActionModule(ActionBase):
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''' pauses execution for a length or time, or until input is received '''
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PAUSE_TYPES = ['seconds', 'minutes', 'prompt', '']
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PAUSE_TYPES = ['seconds', 'minutes', 'prompt', 'echo', '']
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BYPASS_HOST_LOOP = True
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def run(self, tmp=None, task_vars=None):
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@ -60,6 +60,8 @@ class ActionModule(ActionBase):
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duration_unit = 'minutes'
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prompt = None
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seconds = None
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echo = True
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echo_prompt = ''
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result.update(dict(
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changed=False,
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rc=0,
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@ -68,14 +70,35 @@ class ActionModule(ActionBase):
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start=None,
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stop=None,
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delta=None,
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echo=echo
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))
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# Is 'args' empty, then this is the default prompted pause
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if self._task.args is None or len(self._task.args.keys()) == 0:
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prompt = "[%s]\nPress enter to continue:" % self._task.get_name().strip()
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if not set(self._task.args.keys()) <= set(self.PAUSE_TYPES):
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result['failed'] = True
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result['msg'] = "Invalid argument given. Must be one of: %s" % ", ".join(self.PAUSE_TYPES)
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return result
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# Should keystrokes be echoed to stdout?
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if 'echo' in self._task.args:
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echo = self._task.args['echo']
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if not type(echo) == bool:
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result['failed'] = True
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result['msg'] = "'%s' is not a valid setting for 'echo'." % self._task.args['echo']
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return result
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# Add a note saying the output is hidden if echo is disabled
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if not echo:
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echo_prompt = ' (output is hidden)'
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# Is 'prompt' a key in 'args'?
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if 'prompt' in self._task.args:
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prompt = "[%s]\n%s%s:" % (self._task.get_name().strip(), self._task.args['prompt'], echo_prompt)
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else:
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# If no custom prompt is specified, set a default prompt
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prompt = "[%s]\n%s%s:" % (self._task.get_name().strip(), 'Press enter to continue', echo_prompt)
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# Are 'minutes' or 'seconds' keys that exist in 'args'?
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elif 'minutes' in self._task.args or 'seconds' in self._task.args:
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if 'minutes' in self._task.args or 'seconds' in self._task.args:
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try:
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if 'minutes' in self._task.args:
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# The time() command operates in seconds so we need to
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@ -90,16 +113,6 @@ class ActionModule(ActionBase):
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result['msg'] = u"non-integer value given for prompt duration:\n%s" % to_text(e)
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return result
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# Is 'prompt' a key in 'args'?
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elif 'prompt' in self._task.args:
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prompt = "[%s]\n%s:" % (self._task.get_name().strip(), self._task.args['prompt'])
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else:
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# I have no idea what you're trying to do. But it's so wrong.
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result['failed'] = True
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result['msg'] = "invalid pause type given. must be one of: %s" % ", ".join(self.PAUSE_TYPES)
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return result
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########################################################################
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# Begin the hard work!
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@ -113,12 +126,19 @@ class ActionModule(ActionBase):
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if seconds is not None:
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if seconds < 1:
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seconds = 1
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# setup the alarm handler
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signal.signal(signal.SIGALRM, timeout_handler)
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signal.alarm(seconds)
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# show the prompt
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display.display("Pausing for %d seconds" % seconds)
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# show the timer and control prompts
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display.display("Pausing for %d seconds%s" % (seconds, echo_prompt))
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display.display("(ctrl+C then 'C' = continue early, ctrl+C then 'A' = abort)\r"),
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# show the prompt specified in the task
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if 'prompt' in self._task.args:
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display.display(prompt)
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else:
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display.display(prompt)
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@ -144,14 +164,17 @@ class ActionModule(ActionBase):
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# ICANON -> Allows characters to be deleted and hides things like ^M.
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# ICRNL -> Makes the return key work when ICANON is enabled, otherwise
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# you get stuck at the prompt with no way to get out of it.
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# ECHO -> Echos input back to stdout
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#
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# See man termios for details on these flags
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if not seconds:
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new_settings = termios.tcgetattr(fd)
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new_settings[0] = new_settings[0] | termios.ICRNL
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new_settings[3] = new_settings[3] | (termios.ICANON | termios.ECHO)
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new_settings[3] = new_settings[3] | termios.ICANON
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termios.tcsetattr(fd, termios.TCSANOW, new_settings)
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if echo:
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# Enable ECHO since tty.setraw() disables it
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new_settings = termios.tcgetattr(fd)
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new_settings[3] = new_settings[3] | termios.ECHO
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termios.tcsetattr(fd, termios.TCSANOW, new_settings)
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# flush the buffer to make sure no previous key presses
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@ -161,6 +184,8 @@ class ActionModule(ActionBase):
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try:
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if fd is not None:
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key_pressed = stdin.read(1)
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if seconds:
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if key_pressed == b'\x03':
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raise KeyboardInterrupt
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