crononag

crononag

crononag is a super-simple wrapper for commands running from cron to limit nagging emails.

Motivation

There are a couple of existing cron wrappers around, but I needed to be able to customize the suppressed exit codes, and optionally always supress stdout. I also wanted a simple deploy story. Existing solutions didn't meet these criteria, so I wrote this.

Usage

crononag [global options] command [command options] [arguments...]

Simply download crononag and put it on your path, then add crononag in front of the executable in your cron definition and enjoy the silence. You can remove any output redirections, eg:

diff a/cronjob b/cronjob
--- a/cronjob
+++ b/cronjob
@@ -1,3 +1,3 @@
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin

-*/10 * * * * root noisycronjob --with args > /dev/null
+*/10 * * * * root crononag noisycronjob --with args

Now, your job will only produce output in the event of a non-zero exit code. Supressed exit codes may set using the option below.

Options

Currently, crononag supports only very simple options:

-E, --suppress-exit-code [-E option -E option]       suppress output for specified exit code(s), may specify multiple times, defaults to 0
-R, --suppress-regexp [-R option -R option]          suppress output on matching regexp, may specify multiple times
-O, --omit-stdout                                    omit stdout, even on error, defaults to false
-f, --force-regexp [-f option -f option]             force output on matching regexp, may specify multiple times, overrides suppression
-s, --splay "0"                                      sleep for a random duration, up to the specified maximum, format is <decimal><unit>, eg: "5s", "2h45m", "12h", defaults to 0

License

This project rocks and uses the MIT-LICENSE