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powerctrl.py
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powerctrl.py
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#!/usr/bin/env python3
import os
import sys
import argparse
from datetime import datetime, timedelta, time as type_time, date as type_date
from subprocess import check_output,CalledProcessError,STDOUT
import re
def yn(msg, default=False):
default_msg = "[Y/n]" if default else "[y/N]"
while True:
sys.stdout.write("%s %s " % (msg,default_msg))
c = input().lower()
if c == '':
return default
elif c in ("y", "ye","yes"):
return True
elif c in ("n", "no"):
return False
else:
sys.stdout.write("Please respond with yes/y or no/n\n")
def valid_time(s):
try:
return datetime.strptime(s, "%H:%M").time()
except ValueError:
return None
def valid_date(s):
try:
return datetime.strptime(s, "%d%m%Y").date()
except ValueError:
try:
return datetime.strptime(s, "%d/%m/%Y").date()
except ValueError:
try:
return datetime.strptime(s, "%d.%m.%Y").date()
except ValueError:
try:
return datetime.strptime(s, "%d:%m:%Y").date()
except ValueError:
return None
def check_shutdown():
try:
cmd = check_output(["/bin/systemctl","status","systemd-shutdownd.service"])
#Shutodwn is scheduled
r = re.findall(r'Status: \"(.*)\"\n', cmd.decode())[0]
print(r)
except CalledProcessError as e:
#Shutdown is not scheduled
print("Shutdown is not scheduled")
def cancel_shutdown():
try:
cmd = check_output(["/sbin/shutdown","-c"])
except CalledProcessError as e:
sys.exit("Error aborting shutdown: %s" % e)
def execute_shutdown(time, reboot = True, ask=True):
if not ask:
action = "reboot" if reboot else "poweroff"
if not yn("Are you sure you want to %s this system?" % action):
sys.exit(0)
action = "-r" if reboot else "-P"
if len(time) == 0:
cmd = check_output(["/sbin/shutdown",action,"now"],stderr=STDOUT)
print(cmd.decode().split(",",1)[0])
return
# Try to extract date from the first argument
if len(time) == 1:
time = time[0].split(" ",1)
if len(time) == 1:
ts=valid_time(time[0])
if time[0].isdigit() or valid_time(time[0]):
cmd = check_output(["/sbin/shutdown",action,time[0]],stderr=STDOUT)
else:
sys.exit("Timestamp needs to be in format of 12:34")
elif len(time) == 2:
ts = valid_time(time[0])
ds = valid_date(time[1])
if ts and ds:
t = datetime.combine(ds, ts)
td = t-datetime.now()
t2 = 1+int(td.total_seconds())//60 # Get total minutes
cmd = check_output(["/sbin/shutdown",action,str(t2)],stderr=STDOUT)
else:
sys.exit("Timestamp needs to be in format of 12:34\nDatestamp in the format of DD.MM.YY")
else:
sys.exit("Could not decode time and date")
print(cmd.decode().split(",",1)[0])
def main():
parser = argparse.ArgumentParser()
parser.add_argument("--yes", "-y",
help="dont as for shutdown",
action="store_true",
dest="yes")
action = parser.add_mutually_exclusive_group(required=True)
action.add_argument("--reboot", "-r",
help="Reboot the system",
nargs="*",
metavar="Minutes|HH:MM")
action.add_argument("--poweroff", "-p",
help="Poweroff the system",
nargs="*",
metavar="Minutes|HH:MM")
action.add_argument("--cancel", "-c",
help="Cancel pending shutdown",
action="store_true")
action.add_argument("--check",
help="Check pending chutdown",
action="store_true")
args = parser.parse_args()
try:
if args.reboot:
execute_shutdown(args.reboot, reboot=True, ask=args.yes)
if args.poweroff:
execute_shutdown(args.poweroff, reboot=False,ask=args.yes)
if args.cancel:
cancel_shutdown()
if args.check:
check_shutdown()
except KeyboardInterrupt:
sys.exit("Interrupted")
if __name__ == "__main__":
main()

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