.\" Copyright (C) 2017 Alessandro Menti
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.TH FGFSRC 5 2017-05-28 FlightGear "FlightGear man pages"
.SH NAME
fgfsrc \- FlightGear command-line options file
.SH DESCRIPTION
.B fgfsrc
is a file containing command-line options read by
.BR fgfs (1)
at startup. This file is meant for those people who do not use a graphical
launcher to run the simulator, so that they will be able to specify most
preferences that do not change often there (for example, custom
scenery/aircraft locations or screen size options), and only those frequently
modified (like the starting airport) on the command line.

The file must be in plain-text format and ASCII-encoded. It must contain one or
more command-line options listed in
.BR fgfs (1);
each option must be given on a separate line.

If the first non-whitespace character in a line is an octothorpe (\fB#\fR),
.BR fgfs (1)
treats the line as a comment and ignores it. Comments should not be added after
an option, because that might cause the simulator to fail under some conditions
(notably, when the command-line argument given on the line is of the form
\fB\-\-prop=\fR).

Variables in paths, like
.B $HOME
or \fB$FG_HOME\fR, are not expanded.
.SH FILES
.IP "\fI~/.fgfsrc.hostname\fR, \fI~/.fgfsrc\fR" 4
Configuration files containing command-line options for
.BR fgfs (1).
The simulator parses command-line arguments first, then
\fI~/.fgfsrc.hostname\fR (where
.I hostname
is the hostname of the machine) and then \fI~/.fgfsrc\fR, if they exist, in
that order.
.SH EXAMPLE
The following example configuration file synchronizes the simulator clock with
the local real-world time, loads real-world weather data, sets the window size
to 1024x768 and enables random scenery objects and AI traffic:

.nf
\-\-time\-match\-local
\-\-enable\-real\-weather\-fetch
\-\-geometry=1024x768
\-\-enable\-random\-objects
\-\-enable\-ai\-traffic
.fi
.SH "SEE ALSO"
.BR fgfs (1)