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#!/usr/bin/env python3
#
# vyatta-update-ctontab.pl: crontab generator
#
# Maintainer: Daniil Baturin <daniil@baturin.org>
#
# Copyright (C) 2013 SO3Group
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
#
#
import io
import os
import re
import sys
sys.path.append("/usr/lib/python3/dist-packages/vyos/")
import config
from config import VyOSError
def update_crontab():
conf = config.Config()
count = 0
default_user = "root"
crontab = "/etc/cron.d/vyatta-crontab"
crontab_header = "### Added by /opt/vyatta/sbin/vyatta-update-crontab.py ###\n"
if not conf.exists("system task-scheduler task"):
os.remove(crontab)
return 0
crontab_append = crontab_header
conf.set_level("system task-scheduler task")
tasks = conf.list_nodes("")
for task in tasks:
task = task.decode("utf-8")
minutes = "*"
hours = "*"
days = "*"
# Unused now
months = "*"
days_of_week = "*"
try:
user = conf.return_value(" ".join([task, "user"]))
except VyOSError:
user = default_user
try:
executable = conf.return_value(" ".join([task, "executable path"]))
executable = executable.decode("utf-8")
except VyOSError:
raise VyOSError (task + "must define executable")
try:
arguments = conf.return_value(" ".join([task, "executable arguments"]))
except VyOSError:
arguments = ""
try:
interval = conf.return_value(" ".join([task, "interval"]))
except VyOSError:
interval = None
try:
crontab_spec = conf.return_value(" ".join([task, "crontab-spec"]))
except:
crontab_spec = None
if interval and crontab_spec:
raise VyOSError(task, "can not use interval and crontab-spec at the same time!")
if interval:
result = re.search(b"(\d+)([mdh]?)", interval)
value = int(result.group(1))
suffix = result.group(2)
if not suffix or suffix == b"m":
if value > 60:
raise VyOSError("Interval in minutes must not exceed 60!")
minutes = "*/" + str(value)
elif suffix == b"h":
if value > 24:
raise VyOSError("Interval in hours must not exceed 24!")
minutes = "0"
hours = "*/" + str(value)
elif suffix == b"d":
if value > 31:
raise VyOSError("Interval in days must not exceed 31!")
minutes = "0"
hours = "0"
days = "*/" + str(value)
crontab_string = "{minutes} {hours} {days} {months} {days_of_week} {user} {executable} {arguments}\n".format(
minutes=minutes,
hours=hours,
days=days,
months=months,
days_of_week=days_of_week,
user=user,
executable=executable,
arguments=arguments
)
elif crontab_spec:
crontab_string = "{crontab_spec) {user} {executable} {arguments}\n".format(
crontab_spec=crontab_spec,
user=user,
executable=executable,
arguments=arguments
)
else:
raise VyOSError(task, "must define either interval or crontab-spec")
crontab_append = crontab_append + crontab_string
count = count + 1
if count > 0:
try:
f = io.open(crontab, "w")
f.write(crontab_append)
f.close()
except IOError:
print("Could not open /etc/crontab for write")
else:
os.remove(crontab)
if __name__ == '__main__':
try:
update_crontab()
except VyOSError:
sys.exit(0)
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