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xfs - X font server
xfs [-config
configuration_file] [-port tcp_port]
Xfs is the X Window System
font server. It supplies fonts to X Window System display servers.
The server is usually run by a system administrator, and started
via boot files like /etc/rc.local. Users may also wish to start private
font servers for specific sets of fonts.
- -config configuration_file
- Specifies the configuration file the font server will use. If this parameter
is not specified, the default file, /etc/X11/fs/conf, will be used.
- -ls listen-socket
- Specifies a file descriptor which is already set up to be used as the listen
socket. This option is only intended to be used by the font server itself
when automatically spawning another copy of itself to handle additional
connections.
- -port tcp_port
- Specifies the TCP port number on which the server
will listen for connections. The default port number is 7100.
- -daemon
- Instructs
xfs to fork and go into the background automatically at startup If this
option is not specified, xfs will run as a regular process.
- -droppriv
- If
specified, xfs will attempt to run as user and group xfs. This has been
implemented for security reasons, as xfs may have undiscovered buffer overflows
or other paths for possible exploit, both local and remote. With this option,
you may also wish to specify a port of "-1", which insures that xfs will
not to use a TCP port at all, but instead only bind to the port "unix/:-1".
- SIGTERM
- This causes the font server to exit cleanly.
- SIGUSR1
- This
signal is used to cause the server to re-read its configuration file.
- SIGUSR2
- This signal is used to cause the server to flush any cached data it may
have.
- SIGHUP
- This signal is used to cause the server to reset, closing all
active connections and re-reading the configuration file.
The
configuration language is a list of keyword and value pairs. Each keyword
is followed by an '=' and then the desired value.
Recognized keywords include:
- catalogue (list of string)
- Ordered list of font path element names. Use
of the keyword "catalogue" is very misleading at present, the current implementation
only supports a single catalogue ("all"), containing all of the specified
fonts.
- alternate-servers (list of string)
- List of alternate servers for this
font server.
- client-limit (cardinal)
- Number of clients this font server will
support before refusing service. This is useful for tuning the load on
each individual font server.
- clone-self (boolean)
- Whether this font server
should attempt to clone itself when it reachs the client-limit.
- default-point-size
(cardinal)
- The default pointsize (in decipoints) for fonts that don't specify.
The default is 120.
- default-resolutions (list of resolutions)
- Resolutions
the server supports by default. This information may be used as a hint for
pre-rendering, and substituted for scaled fonts which do not specify a
resolution. A resolution is a comma-separated pair of x and y resolutions
in pixels per inch. Multiple resolutions are separated by commas.
- error-file
(string)
- Filename of the error file. All warnings and errors will be logged
here.
- port (cardinal)
- TCP port on which the server will listen for connections.
- no-listen (trans-type)
- Disable a transport type. For example, TCP/IP connections
can be disabled with no-listen tcp
- use-syslog (boolean)
- Whether syslog(3)
(on supported systems) is to be used for errors.
- deferglyphs (string)
- Set
the mode for delayed fetching and caching of glyphs. Value is "none", meaning
deferred glyphs is disabled, "all", meaning it is enabled for all fonts,
and "16", meaning it is enabled only for 16-bits fonts.
#
# sample font server configuration file
#
# allow a max of 10 clients to connect to this font server
client-limit = 10
# when a font server reaches its limit, start up a new one
clone-self = on
# alternate font servers for clients to use
alternate-servers = hansen:7101,hansen:7102
# where to look for fonts
# the first is a set of Speedo outlines, the second is a set of
# misc bitmaps and the last is a set of 100dpi bitmaps
#
catalogue = /usr/X11R6/lib/X11/fonts/speedo,
/usr/X11R6/lib/X11/fonts/misc,
/usr/X11R6/lib/X11/fonts/100dpi/
# in 12 points, decipoints
default-point-size = 120
# 100 x 100 and 75 x 75
default-resolutions = 100,100,75,75
use-syslog = off
One of the following forms can be used to name a font
server that accepts TCP connections:
tcp/hostname:port
tcp/hostname:port/cataloguelist
The hostname specifies the name (or decimal numeric address) of the machine
on which the font server is running. The port is the decimal TCP port on
which the font server is listening for connections. The cataloguelist specifies
a list of catalogue names, with '+' as a separator.
Examples: tcp/fs.x.org:7100,
tcp/18.30.0.212:7101/all.
One of the following forms can be used to name a
font server that accepts DECnet connections:
decnet/nodename::font$objname
decnet/nodename::font$objname/cataloguelist
The nodename specifies the name (or decimal numeric address) of the machine
on which the font server is running. The objname is a normal, case-insensitive
DECnet object name. The cataloguelist specifies a list of catalogue names,
with '+' as a separator.
Examples: DECnet/SRVNOD::FONT$DEFAULT, decnet/44.70::font$special/symbols.
X(1)
, The X Font Service Protocol,
Font server implementation overview
Multiple catalogues should be supported.
Dave Lemke, Network Computing Devices, Inc
Keith Packard, Massachusetts Institute of Technology
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