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Rough cut implementation based on @resmo's comments.

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Richard C Isaacson 2014-01-15 01:32:19 -06:00 committed by Michael DeHaan
parent b00939acff
commit cd871384de
1 changed files with 97 additions and 30 deletions
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127
library/system/at
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@ -24,6 +24,7 @@ module: at
short_description: Schedule the execution of a command or scripts via the at command.
description:
- Use this module to schedule a command or script to run once in the future.
- All jobs are executed in the a queue.
version_added: "0.0"
options:
user:
@ -50,6 +51,13 @@ options:
- The type of units in the future to execute the command or script.
required: true
choices: ["minutes", "hours", "days", "weeks"]
action:
description:
- The action to take for the job defaulting to add. Unique will verify that there is only one entry in the queue.
- Delete will remove all existing queued jobs.
required: true
choices: ["add", "delete", "unique"]
default: add
requirements:
- at
author: Richard Isaacson
@ -57,15 +65,56 @@ author: Richard Isaacson
EXAMPLES = '''
# Schedule a command to execute in 20 minutes as root.
- at: command="ls -d > /dev/null" unit_count=1 unit_type="minutes"
- at: command="ls -d / > /dev/null" unit_count=20 unit_type="minutes"
# Schedule a script to execute in 1 hour as the neo user.
- at: script_file="/some/script.sh" user="neo" unit_count=1 unit_type="hours"
# Match a command to an existing job and delete the job.
- at: command="ls -d / > /dev/null" action="delete"
# Schedule a command to execute in 20 minutes making sure it is unique in the queue.
- at: command="ls -d / > /dev/null" action="unique" unit_count=20 unit_type="minutes"
'''
import os
import tempfile
def matching_jobs(module, at_cmd, script_file, user=None):
matching_jobs = []
atq_cmd = module.get_bin_path('atq', True)
# Get list of job numbers for the user.
atq_command = "%s" % (atq_cmd)
if user:
atq_command = "su '%s' -c '%s'" % (user, atq_command)
rc, out, err = module.run_command(atq_command)
if rc != 0:
module.fail_json(msg=err)
current_jobs = out.splitlines()
if len(current_jobs) == 0:
return matching_jobs
# Read script_file into a string.
script_file_string = open(string_file).read()
# Loop through the jobs.
# If the script text is contained in a job add job number to list.
for current_job in current_jobs:
split_current_job = current_job.split()
at_command = "%s -c %s" % (at_cmd, split_current_job[0])
if user:
at_command = "su '%s' -c '%s'" % (user, at_command)
rc, out, err = module.run_command(at_command)
if rc != 0:
module.fail_json(msg=err)
if script_file_string in out:
matching_jobs.append(split_current_job[0])
# Return the list.
return matching_jobs
#================================================
def main():
@ -75,57 +124,75 @@ def main():
user=dict(required=False),
command=dict(required=False),
script_file=dict(required=False),
unit_count=dict(required=True),
unit_count=dict(required=True,
type='int'),
unit_type=dict(required=True,
default=None,
choices=["minutes", "hours", "days", "weeks"],
type="str")
type="str"),
action=dict(required=False,
default="add",
choices=["add", "delete", "unique"],
type="str")
),
supports_check_mode = False,
)
atcmd = module.get_bin_path('at', True)
at_cmd = module.get_bin_path('at', True)
user = module.params['user']
user = module.params['user']
command = module.params['command']
script_file = module.params['script_file']
unit_count = module.params['unit_count']
unit_type = module.params['unit_type']
action = module.params['action']
if (not command) and (not script_file):
module.fail_json(msg="command or script_file not specified")
if command and script_file:
module.fail_json(msg="command and script_file are mutually exclusive")
result = {}
result['changed'] = False
result['unit_count'] = unit_count
result['unit_type'] = unit_type
# If command transform it into a script_file
if command:
filed, path = tempfile.mkstemp(prefix='at')
result['script_file'] = path
filed, script_file = tempfile.mkstemp(prefix='at')
fileh = os.fdopen(filed, 'w')
fileh.write(command)
fileh.close()
at_command = "%s now + %s %s -f %s" % (atcmd, unit_count, unit_type, path)
if user:
at_command = "chown %s %s; su '%s' -c '%s'" % (user, path, user, at_command)
rc, out, err = module.run_command(at_command)
if rc != 0:
module.fail_json(msg=err)
os.unlink(path)
result['changed'] = True
elif script_file:
result['script_file'] = script_file
at_command = "%s now + %s %s -f %s" % (atcmd, unit_count, unit_type, script_file)
if user:
# We expect that if this is an installed the permissions are already correct for the user to execute it.
at_command = "su '%s' -c '%s'" % (user, at_command)
rc, out, err = module.run_command(at_command)
if rc != 0:
module.fail_json(msg=err)
result['changed'] = True
else:
module.fail_json(msg="command or script_file not specified")
# if delete then return
if action == 'delete':
for matching_job in matching_jobs(module, at_cmd, script_file, user):
at_command = "%s -d %s" % (at_cmd, matching_job)
if user:
at_command = "su '%s' -c '%s'" % (user, at_ccommand)
rc, out, err = module.run_command(at_command)
if rc != 0:
module.fail_json(msg=err)
result['changed'] = True
# if unique if existing return unchanged
if action == 'unique':
if not matching_jobs(module, at_cmd, script_file, user):
module.exit_json(**result)
result['script_file'] = script_file
result['unit_count'] = unit_count
result['unit_type'] = unit_type
at_command = "%s now + %s %s -f %s" % (at_cmd, unit_count, unit_type, script_file)
if user:
# We expect that if this is an installed the permissions are already correct for the user to execute it.
at_command = "su '%s' -c '%s'" % (user, at_command)
rc, out, err = module.run_command(at_command)
if rc != 0:
module.fail_json(msg=err)
if command:
os.unlink(script_file)
result['changed'] = True
module.exit_json(**result)