|SNOOZE(1)||General Commands Manual||SNOOZE(1)|
snoozewaits until a particular time and then runs a command. Together with a service supervision system such as runsv(8), this can be used to replace cron(8).
The options are as follows:
The durations randdelay and
slack and timewait are parsed as
seconds, unless a postfix of
m for minutes,
h for hours, or
d for days
The remaining arguments are patterns for the time fields:
The following syntax is used for these options:
and combinations of those, e.g.
The defaults are
-d* -m* -w* -D* -W* -H0 -M0
-S0, that is, every midnight.
Note that all patterns need to match (contrary
to cron(8) where either day of month
or day of week matches), so
-d13 only runs on Friday the 13th.
snooze receives a
SIGALRM signal, the command is immediately
-T is passed, execution will not
start earlier than the mtime of timefile plus
-T is not passed,
snooze will start finding the first matching time
starting from the mtime of timefile, and taking
slack into account. (E.g.
-H0 -s 1d
-t timefile will start an instant execution when timefile has not
been touched today, whereas without
-t this would
always wait until next midnight.)
If timefile does not exist, it will be assumed outdated enough to ensure earliest execution.
snooze does not update the timefiles, your
job needs to do that! Only mtime is looked at, so
touch(1) is good.
snoozeutility exits 0 on success, and >0 if an error occurs.
The command is run using exec, so its exit status gets propagated to the parent.
If no command was given,
returns with status 0.
snoozeis in the public domain.
To the extent possible under law, the creator of this work has waived all copyright and related or neighboring rights to this work.
|January 4, 2016||x86_64|