I just want to clear the screen sounds like such a simple thing. Why is it difficult? Because there are so many types of screens! Are we talking about a terminal emulator program, like xterm, rxvt, telnet? Are we talking about a physical terminal on a serial line (vt220)? Is it a line printer???? Is it a Tk text widget?
Here are a few ways:
exec clear >@ stdout ; # Most unix systems should have a clear command
puts \x1B\[2J ; # for Solaris xterm - VERY terminal specific
eval exec [auto_execok cls] ; # Most windows systems should have a cls
exec command /c cls ; # DOS?
exec >&@stdout $::env(COMSPEC) /c cls ; # Win95
$t delete 1.0 end ;# Tk text widgetBruce Hartweg suggests [L1 ] for a Windows system:
eval exec >&@stdout <@stdin [auto_execok cls]
Pretty neat tricks ;) -- Ro
Angel Sosa: In addition the following examples clears the whole screen (on which platforms and for what kinds of machines?)
puts \x1b\[H\x1b\[2J
This initializes and clears the screen on a unix system with some sort of terminfo/termcap/curses library installation: :
exec tput clear >@ stdout