Intelligent interface to cron in UNIX systems
Project description
Installation
Run pip install supercron.
SuperCron vs classical crontab
SuperCron is based on crontab, while providing the following additional advantages:
it can run interactively or non-interactively.
it allows controlling several jobs simultaneously if they were assigned the same job name.
it provides more options to handle jobs: adding, removing, searching, enabling, disabling, etc.
it allows a vast and flexible amount of repetition sentences.
it allows trigger-induced jobs based on the states of other jobs.
it is more friendly especially to new sysadmins.
Usage
SuperCron can run either in interactive mode or non-interactive mode.
Interactive mode:
Run supercron without any arguments to start interactive mode. You will prompted to choose an action, and then to enter action parameters (like name, command and repetition) if any.
Non-interactive mode:
In non-interactive mode, one of the following options can be used after the command name supercron.
option -h or --help: shows the help message, with some usage examples
option -V or --version: displays the version number
Additionally, one of the following subcommands can be used: add, delete, enable, disable, search, clear, trigger.
Subcommand add
option -h or --help: shows the help message of the subcommand
option -q or --quiet: optional; suppresses all output and error messages
option -c or --command: required; here goes the command to be executed
option -r or --repetition: required; the repetition sentence (see examples below)
argument name: required; represents the job name which will be added (several jobs can share the same name)
Subcommand rename
option -h or –help: shows the help message of the subcommand
option -q or –quiet: optional; suppresses all output and error messages
argument old_name: required; old name of the job(s) (several jobs can share the same name)
argument new_name: required; new name of the job(s) (several jobs can share the same name)
Subcommands delete, enable and disable
option -h or --help: shows the help message of the subcommand
option -q or --quiet: optional; suppresses all output and error messages
argument name: required; represents the job name on which the action will occur (several jobs can share the same name)
Subcommand search
option -h or --help: shows the help message of the subcommand
argument name: required; the exact job name to search for, or @supercron to list all SuperCron jobs, or @all to list all user’s crontab entries
Subcommand clear
option -h or --help: shows the help message of the subcommand
option -q or –quiet: optional; suppresses all output and error messages
option -f or --force: skips asking for confirmation before clearing all jobs
Note: this subcommand will only clear SuperCron jobs from user’s crontab.
Subcommand trigger
option -h or --help: shows the help message of the subcommand
option -q or --quiet: optional; suppresses all output and error messages
option -t or --trigger: trigger in the form of “none” or “ACTION if NAME is STATE”. See Triggers section below.
argument name: required; represents the triggered job name on which ACTION will occur (several jobs can share the same name)
Triggers
Triggers can take one of 2 forms:
“none” for removing the previous trigger
“ACTION if NAME is STATE” for adding a new trigger or replacing an old one
ACTION is the action applied on the enabled state of the triggered job and it can be on, off or toggle.
NAME is the name of the triggering job.
STATE is the triggering state of the triggering job, and it can be enabled, disabled, toggled, added or deleted.
Using action toggle means to enable the triggered job if it was disabled, and to disable it if it was enabled.
State toggled activates the trigger when the triggering job is enabled or disabled.
Note that when a job is renamed from name1 to name2, it means activating triggers that end with if name1 is deleted and triggers that end with if name2 is added, since a rename is considered a deletion of the old job name and an addition of the new job name.
Examples
Add a job:
supercron add -c "date +%j >> log_file" -r "every 2 days" log_dates supercron add -c "scp -r /path1 user@server:/path2" -r "at 11:50 pm on mondays" backup_server
Rename a job:
supercron rename log_dates log_all_dates
Delete a job:
supercron delete log_dates
Enable a job:
supercron enable log_dates
Disable a job:
supercron disable log_dates
Search jobs:
supercron search log_dates supercron search @supercron supercron search @all
Clear all SuperCron jobs:
supercron clear
Add trigger to a job:
supercron trigger -t "on if log_months is off" log_days
Remove trigger from a job:
supercron trigger -t none log_days
Repetition sentences
Repetition sentences are provided in a supercron add command directly after the -r or --repetition option.
Examples of accepted repetition sentences (case insensitive):
everyday
at midnight
every 5 minutes
once every 2 hours
every 10 days
every 4 months
on mondays
on monday, wednesday and friday
from saturday to tuesday
on fri
on mon, wed and fri
from mon to thu
at 11:50
at 23:50
at 10:10 am
at 10:10 pm
on 19/5
on 14 May
in september
in sep
from may to august
from dec to feb
in january and april
in jan, aug, oct
Repetition sentences can also be any (unsorted) logical mix of the above. For example:
at 09:00 every 3 days
from june to november every 2 hours
every 30 minutes on fri and sat
midnight from monday to friday in october and december
Homepage and Repository
Homepage: https://linostar.github.io/SuperCron
Repository: https://github.com/linostar/SuperCron
Download files
Download the file for your platform. If you're not sure which to choose, learn more about installing packages.
