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#!/usr/bin/env python3
import os
import sys
import time
from argparse import ArgumentParser
# Minutes before reboot to trigger notification.
intervals = [1, 5, 15, 60]
parser = ArgumentParser()
parser.add_argument(
'minutes', type=int, help='minutes before rollback to trigger notification'
)
parser.add_argument(
'--reboot', action='store_true', help="use 'soft' rollback instead of reboot"
)
def notify(interval, reboot=False):
s = '' if interval == 1 else 's'
time.sleep((minutes - interval) * 60)
if reboot:
message = (
'"[commit-confirm] System will reboot in '
f'{interval} minute{s}\nto rollback the last commit.\n'
'Confirm your changes to cancel the reboot."'
)
os.system('wall -n ' + message)
else:
message = (
'"[commit-confirm] System will reload previous config in '
f'{interval} minute{s}\nto rollback the last commit.\n'
'Confirm your changes to cancel the reload."'
)
os.system('wall -n ' + message)
if __name__ == '__main__':
# Must be run as root to call wall(1) without a banner.
if os.getuid() != 0:
print('This script requires superuser privileges.', file=sys.stderr)
exit(1)
args = parser.parse_args()
minutes = args.minutes
reboot = args.reboot
# Drop the argument from the list so that the notification
# doesn't kick in immediately.
if minutes in intervals:
intervals.remove(minutes)
for interval in sorted(intervals, reverse=True):
if minutes >= interval:
notify(interval, reboot=reboot)
minutes -= minutes - interval
exit(0)
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