XSYSTEM(8X11)           COMMAND REFERENCE           XSYSTEM(8X11)



NAME
     xsystem - X Window System

SYNOPSIS
     /etc/xsystem

     This is supported.

DESCRIPTION
     xsystem is a program that starts up the X window system at
     system start-up (when the workstation is booted or right
     after a user logs off the workstation from the workstation's
     display).  It reads the first line of the file /etc/X.conf
     to determine whether if the X Window system is enabled for
     the workstation.  If the enable line of  X.conf is "yes",
     the specified X server, console emulator, and login terminal
     emulator are started.

     In the case where the workstation is enabled for X, after
     xsystem brings up the X window system, it waits for any of
     the started processes to terminate.  If either the X server
     or the login emulator terminal emulator window terminates,
     the X window system is terminated.  If the console terminal
     emulator terminates then it will be restarted by  xsystem.

     If the first line of the file X.conf is "no" (X is not
     enabled for the workstation), or if xsystem encounters any
     errors, then /etc/getty is executed to allow a user to login
     to a full UTek screen.

     In any case, any error messages are recorded in the log file
     /usr/adm/xsystem.log.

     xsystem is invoked automatically at start-up time, or can be
     invoked by a user on a command line. When invoked at start-
     up time, it is invoked by the process init.  When invoked by
     init, the command field for the console entry in the ttys
     file must be "xsytem y" and the enable line in the X.conf
     file must be "yes" (see xconfig(8x11) to allow xsystem to
     restart the X window system.

     However, when xsystem is invoked by a user on a command line
     (after logging into a full screen), the enable line in the
     X.conf file is ignored and xsystem will start up the X
     window system.  However if xsystem encounters any errors it
     will exit.

     The correct way to change any of the workstation's
     configurations for the X the window system is to run xconfig
     and then log out of the login window (and if the user logged
     into a full screen, the user must also log out of the full
     screen).  When the login window terminates,  xsystem shuts



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XSYSTEM(8X11)           COMMAND REFERENCE           XSYSTEM(8X11)



     down the window system and terminates itself.   init will
     restart xsystem and the cycle continues again.

     The xsystem program also creates a lock file in the /tmp
     directory for xenv to use. Once xsystem is running, xenv can
     be run only once, and only by the user who logged in to the
     X window system or started the X window system from a full
     screen command line.

     SIGHUP and SIGTERM signal cause xsystem to shut down the
     window system gracefully.

FILES
     X.conf(5x11)   Created by xconfig(8x11) and used by
                    xsystem(8x11).

     ttys(5)        Controls the process started by init(8).

     xsystem.log    Error messages are recorded in
                    /usr/adm/xsystem.log

SEE ALSO
     xenv(1x11), ttys(5), X.conf(5x11), xconfig(8x11), init(8),
     getty(8).

REFERENCES
     Appendix A of the X11 User Manual




























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