adding vyatta-update-crontab.py

1 files changed, 147 insertions, 0 deletions

diff --git a/src/conf-mode/vyatta-update-crontab.py b/src/conf-mode/vyatta-update-crontab.py
new file mode 100755
index 000000000..605742828
--- /dev/null
+++ b/src/conf-mode/vyatta-update-crontab.py
@@ -0,0 +1,147 @@
+#!/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)
\ No newline at end of file