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# XSCHEM REMOTE INTERFACE SPECIFICATION

### GENERAL INFORMATIONS

XSCHEM embeds a tcl shell, when running xschem the terminal will present a tcl prompt allowing to send / get commands through it. Most user actions done in the drawing window can be done by sending tcl commands through the tcl shell. Since I/O is simply done through stdin/stdout this allows XSCHEM to be controlled by another application, by piping XSCHEM commands to XSCHEM stdin and getting XSCHEM answers piped from XSCHEM stdout.

XSCHEM implements a TCL `xschem` command that accepts additional arguments. This command implements all the XSCHEM remote interface. Of course all Tck-Tk commands are available, for example, if this command is sent to XSCHEM: '`wm withdraw .`' the xschem main window will be withdrawn by the window manager, while '`wm state . normal`' will show again the window.
This command: '`puts $XSCHEM_LIBRARY_PATH`' will print the content of the `XSCHEM_LIBRARY_PATH` tcl variable containing the search path.