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LEGAL
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Makefile
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Makefile.depend
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atrun.c
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atrun.man
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gloadavg.c
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gloadavg.h
(1.38 KB)
Editing: atrun.man
.\" $FreeBSD$ .Dd June 22, 2015 .Dt ATRUN 8 .Os .Sh NAME .Nm atrun .Nd run jobs queued for later execution .Sh SYNOPSIS .Nm atrun .Op Fl l Ar load_avg .Op Fl d .Sh DESCRIPTION .Nm Atrun runs jobs queued by .Xr at 1 . .Pp The system .Xr crontab 5 file .Pa /etc/crontab must contain the line .Bd -literal */5 * * * * root /usr/libexec/atrun .Ed .Pp so .Nm is invoked every five minutes. .Pp At every invocation, .Nm starts all the jobs in the lowercase queues whose start time has elapsed. In addition, if the load average over the last minute was less than the specified limit, then a maximum of one batch job (denoted by the uppercase queues) is started. .Pp Before starting a job, .Nm checks the status of its owner's account with .Xr pam 3 and refuses to run the job if the account is unavailable, e.g., locked out or expired. .Sh OPTIONS .Bl -tag -width indent .It Fl l Ar load_avg Specify a limiting load factor, over which batch jobs should not be run, instead of the default of 1.5 * number of active CPUs. .It Fl d Debug; print error messages to standard error instead of using .Xr syslog 3 . .El .Sh WARNINGS For .Nm to work, a .Xr cron 8 daemon must be running .Nm periodically. .Sh FILES .Bl -tag -width /etc/pam.d/atrun -compact .It Pa /etc/pam.d/atrun .Xr pam.conf 5 configuration file for .Nm .It Pa /var/at/jobs Directory containing job files .It Pa /var/at/spool Directory containing output spool files .El .Sh SEE ALSO .Xr at 1 , .Xr crontab 1 , .Xr pam 3 , .Xr syslog 3 , .Xr crontab 5 , .Xr pam.conf 5 , .Xr cron 8 .Sh BUGS The functionality of .Nm should be merged into .Xr cron 8 .
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