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xfs - X font server
configuration_file] [-daemon] [-droppriv] [-ls listen_socket] [-nodaemon] [-port
tcp_port] [-user username]
Xfs is the X Window System font server.
It supplies fonts to X Window System display servers.
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, /usr/X11R6/lib/X11/fs/config 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
- -port tcp_port
- Specifies the TCP port number on which the server
will listen for connections. The default port number is 7100.
xfs to fork and go into the background automatically at startup If this
option is not specified, xfs will run as a regular process (unless xfs
was built to daemonize by default).
- If specified, xfs will attempt
to run as user and group xfs (unless the
- When xfs is built to
daemonize (run in the background) by default, this prevents that and starts
xfs up as a regular process. -user option is used). 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 "no-listen = tcp" in the config file, which
ensures that xfs will not to use a TCP port at all.
- -user username
- This is
equivalent to -droppriv except that xfs will run as user username.
The configuration language
is a list of keyword and value pairs. Each keyword is followed by an '=' and
then the desired value.
- This causes the font server to exit cleanly.
- This signal is used
to cause the server to re-read its configuration file.
- This signal
is used to cause the server to flush any cached data it may have.
- This signal is used to cause the server to reset, closing all active connections
and re-reading the configuration file.
Recognized keywords include:
- catalogue (list of
- 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.
(list of string)
- List of alternate servers for this font server.
- 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.
(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
- error-file (string)
- Filename of the error file. All warnings and
errors will be logged here.
- no-listen (trans-type)
- Disable a transport type.
For example, TCP/IP connections can be disabled with no-listen tcp
- TCP port on which the server will listen for connections.
- 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
# 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,
# 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:
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.
One of the following forms can be used to name a
font server that accepts DECnet connections:
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.
, 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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