freebsd-nq/sbin/casperd/casperd.8

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.\" This documentation was written by Pawel Jakub Dawidek under sponsorship
.\" from the FreeBSD Foundation.
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.Dd October 26, 2013
.Dt CASPERD 8
.Os
.Sh NAME
.Nm casperd
.Nd "Capability Services friendly daemon"
.Sh SYNOPSIS
.Nm
[-Fhv] [-D servconfdir] [-P pidfile] [-S sockpath]
.Op Fl Fhv
.Op Fl D Ar servconfdir
.Op Fl P Ar pidfile
.Op Fl S Ar sockpath
.Sh DESCRIPTION
The
.Nm
daemon hosts various services that can be accessed through
libcapsicum's capabilities by programs running in sandboxes.
For example it is prohibited to send UDP packets to arbitrary destinations
when operating in capability mode, which makes DNS resolution impossible.
To make it possible the
.Nm
daemon provides the
.Nm system.dns
service that proxies DNS resolution requests through a dedicated,
non-sandboxed process provided by
.Nm .
.Pp
The
.Nm
daemon can be started with the following command line arguments:
.Bl -tag -width ".Fl D Ar servconfdir"
.It Fl D Ar servconfdir
Specify alternative location of the service configuration directory.
The default location is
.Pa /etc/casper/ .
.It Fl F
Start the
.Nm
daemon in the foreground.
By default
.Nm
starts in the background.
.It Fl h
Print the
.Nm
usage message.
.It Fl P Ar pidfile
Specify alternative location of a file where main process PID will be
stored.
The default location is
.Pa /var/run/casperd.pid .
.It Fl S Ar sockpath
Specify alternative location of the
.Xr unix 4
domain socket used to connect to the
.Nm
daemon.
The default location is
.Pa /var/run/casper .
.It Fl v
Print or log verbose/debugging information.
This option can be specified multiple times to raise the verbosity
level.
.El
.Sh FILES
.Bl -tag -width ".Pa /var/run/casperd.pid" -compact
.It Pa /etc/casper/
The configuration directory for
.Nm
services.
.It Pa /var/run/casper
.Xr unix 4
domain socket used to connect to the
.Nm
daemon.
.It Pa /var/run/casperd.pid
The default location of the
.Nm
PID file.
.El
.Sh EXIT STATUS
Exit status is 0 on success, and > 0 of an error occurs.
.Sh SEE ALSO
.Xr cap_enter 2 ,
.Xr libcapsicum 3 ,
.Xr pidfile 3 ,
.Xr capsicum 4 ,
.Xr unix 4
.Sh AUTHORS
The
.Nm
was implemented by
.An Pawel Jakub Dawidek Aq pawel@dawidek.net
under sponsorship from the FreeBSD Foundation.