Section: RXVT-UNICODE (1)
urxvtd - urxvt terminal daemon
[-q|--quiet] [-o|--opendisplay] [-f|--fork] [-m|--mlock] [-e|--eval perlstring
urxvtd -q -o -f # for .xsession use
This manpage describes the urxvtd daemon, which is the same vt102
terminal emulator as urxvt, but runs as a daemon that can open
multiple terminal windows within the same process.
You can run it from your X startup scripts, for example, although it is
not dependent on a working DISPLAY and, in fact, can open windows on
multiple X displays on the same time.
Advantages of running a urxvt daemon include faster creation time
for terminal windows and a lot of saved memory.
The disadvantage is a possible impact on stability - if the
main program crashes, all processes in the terminal windows are
terminated. For example, as there is no way to cleanly react to abnormal
connection closes, "xkill" and server resets/restarts will kill the
urxvtd instance including all windows it has opened.
currently understands a few options only. Bundling of
options is not yet supported.
- -q, --quiet
Normally, urxvtd outputs the message "rxvt-unicode daemon
listening on <path>" after binding to its control socket. This option
will suppress this message (errors and warnings will still be logged).
- -o, --opendisplay
This forces urxvtd to open a connection to the current
$DISPLAY and keep it open.
This is useful if you want to bind an instance of urxvtd to
the lifetime of a specific display/server. If the server does a reset,
urxvtd will be killed automatically.
- -f, --fork
This makes urxvtd fork after it has bound itself to its control
- -m, --mlock
This makes urxvtd call mlockall(2) on itself. This locks
urxvtd in RAM and prevents it from being swapped out to disk,
at the cost of consuming a lot more memory on most operating systems.
Note: In order to use this feature, your system administrator must have set
your user's RLIMIT_MEMLOCK to a size greater than or equal to the size of the
urxvtd binary (or to unlimited). See /etc/security/limits.conf.
Note 2: There is a known bug in glibc (possibly fixed in 2.8 and later
versions) where calloc returns non-zeroed memory when mlockall is in
effect. If you experience crashes or other odd behaviour while using
--mlock, try it without it.
- -e, --eval perlstring
Evaluate the given perl code after basic initialisation (requires perl
support to be enabled when compiling urxvtd).
This can be used for example to configure the internal perl interpreter,
which is shared between all terminal instances, or create additional
listening sockets for additional protocols.
The code is currently executed before creating the normal listening
sockets: this might change in future versions.
This is a useful invocation of urxvtd
in a .xsession
urxvtd -q -f -o
This waits till the control socket is available, opens the current display
and forks into the background. When you log-out, the server is reset and
urxvtd is killed.
Both urxvtc and urxvtd use the environment
variable RXVT_SOCKET to create a listening socket and to contact
the urxvtd, respectively. If the variable is missing then
$HOME/.urxvt/urxvtd-<nodename> is used.
Only used when the "--opendisplay" option is specified. Must contain a
valid X display name.