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add crontab with user parser
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Kelly Brazil
269
jc/parsers/crontab_u.py
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269
jc/parsers/crontab_u.py
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@ -0,0 +1,269 @@
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"""jc - JSON CLI output utility crontab file Parser
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Usage:
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specify --crontab-u as the first argument if the piped input is coming from a crontab file with User specified
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Compatibility:
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'linux', 'darwin', 'aix', 'freebsd'
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Examples:
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$ cat /etc/crontab | jc --crontab -p
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{
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"variables": [
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{
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"name": "MAILTO",
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"value": "root"
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},
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{
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"name": "PATH",
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"value": "/sbin:/bin:/usr/sbin:/usr/bin"
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},
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{
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"name": "SHELL",
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"value": "/bin/bash"
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}
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],
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"schedule": [
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{
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"minute": [
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"5"
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],
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"hour": [
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"10-11",
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"22"
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],
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"day_of_month": [
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"*"
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],
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"month": [
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"*"
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],
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"day_of_week": [
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"*"
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],
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"command": "/var/www/devdaily.com/bin/mk-new-links.php"
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},
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{
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"minute": [
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"30"
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],
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"hour": [
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"4/2"
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],
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"day_of_month": [
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"*"
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],
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"month": [
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"*"
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],
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"day_of_week": [
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"*"
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],
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"command": "/var/www/devdaily.com/bin/create-all-backups.sh"
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},
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{
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"occurrence": "yearly",
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"command": "/home/maverick/bin/annual-maintenance"
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},
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{
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"occurrence": "reboot",
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"command": "/home/cleanup"
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},
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{
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"occurrence": "monthly",
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"command": "/home/maverick/bin/tape-backup"
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}
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]
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}
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$ cat /etc/crontab | jc --crontab -p -r
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{
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"variables": [
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{
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"name": "MAILTO",
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"value": "root"
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},
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{
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"name": "PATH",
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"value": "/sbin:/bin:/usr/sbin:/usr/bin"
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},
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{
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"name": "SHELL",
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"value": "/bin/bash"
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}
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],
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"schedule": [
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{
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"minute": "5",
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"hour": "10-11,22",
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"day_of_month": "*",
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"month": "*",
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"day_of_week": "*",
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"command": "/var/www/devdaily.com/bin/mk-new-links.php"
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},
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{
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"minute": "30",
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"hour": "4/2",
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"day_of_month": "*",
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"month": "*",
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"day_of_week": "*",
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"command": "/var/www/devdaily.com/bin/create-all-backups.sh"
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},
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{
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"occurrence": "yearly",
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"command": "/home/maverick/bin/annual-maintenance"
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},
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{
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"occurrence": "reboot",
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"command": "/home/cleanup"
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},
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{
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"occurrence": "monthly",
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"command": "/home/maverick/bin/tape-backup"
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}
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]
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}
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"""
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import jc.utils
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import jc.parsers.universal
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class info():
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version = '1.0'
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description = 'crontab with user file parser'
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author = 'Kelly Brazil'
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author_email = 'kellyjonbrazil@gmail.com'
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# details = 'enter any other details here'
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# compatible options: linux, darwin, cygwin, win32, aix, freebsd
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compatible = ['linux', 'darwin', 'aix', 'freebsd']
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__version__ = info.version
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def process(proc_data):
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"""
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Final processing to conform to the schema.
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Parameters:
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proc_data: (dictionary) raw structured data to process
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Returns:
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Dictionary. Structured data with the following schema:
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{
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"variables": [
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"name": string,
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"value": string
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],
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"schedule": [
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{
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"occurrence" string,
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"minute": [
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string
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],
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"hour": [
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string
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],
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"day_of_month": [
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string
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],
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"month": [
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string
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],
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"day_of_week": [
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string
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],
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"occurrence": string,
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"command": string
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}
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]
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}
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"""
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# put itmes in lists
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try:
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for entry in proc_data['schedule']:
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entry['minute'] = entry['minute'].split(',')
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entry['hour'] = entry['hour'].split(',')
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entry['day_of_month'] = entry['day_of_month'].split(',')
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entry['month'] = entry['month'].split(',')
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entry['day_of_week'] = entry['day_of_week'].split(',')
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except (KeyError):
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pass
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return proc_data
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def parse(data, raw=False, quiet=False):
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"""
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Main text parsing function
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Parameters:
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data: (string) text data to parse
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raw: (boolean) output preprocessed JSON if True
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quiet: (boolean) suppress warning messages if True
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Returns:
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Dictionary. Raw or processed structured data.
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"""
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if not quiet:
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jc.utils.compatibility(__name__, info.compatible)
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raw_output = {}
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cleandata = data.splitlines()
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# Clear any blank lines
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cleandata = list(filter(None, cleandata))
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# Clear any commented lines
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for i, line in reversed(list(enumerate(cleandata))):
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if line.strip().find('#') == 0:
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cleandata.pop(i)
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# Pop any variable assignment lines
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cron_var = []
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for i, line in reversed(list(enumerate(cleandata))):
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if line.find('=') != -1:
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var_line = cleandata.pop(i)
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var_name = var_line.split('=', maxsplit=1)[0].strip()
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var_value = var_line.split('=', maxsplit=1)[1].strip()
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cron_var.append({'name': var_name,
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'value': var_value})
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raw_output['variables'] = cron_var
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# Pop any shortcut lines
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shortcut_list = []
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for i, line in reversed(list(enumerate(cleandata))):
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if line.strip().startswith('@'):
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shortcut_line = cleandata.pop(i)
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occurrence = shortcut_line.split(maxsplit=1)[0].strip().lstrip('@')
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cmd = shortcut_line.split(maxsplit=1)[1].strip()
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shortcut_list.append({'occurrence': occurrence,
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'command': cmd})
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# Add header row for parsing
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cleandata[0] = 'minute hour day_of_month month day_of_week user command'
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if len(cleandata) > 1:
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cron_list = jc.parsers.universal.simple_table_parse(cleandata)
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raw_output['schedule'] = cron_list
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# Add shortcut entries back in
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for item in shortcut_list:
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raw_output['schedule'].append(item)
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if raw:
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return raw_output
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else:
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return process(raw_output)
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