01-11-2009
Nobody is using reals teletypes nowadays, and few people still use true terminals. In the latter case, there are usually ways to get the actual width and it is safe to default to 80 characters should it fails.
I'm quite sure all the tty drivers available in modern Unix variants handle the non POSIX tty wxh geometry (termios TIOCGWINSZ) and the event triggered when it changes (SIGWINCH) when using a terminal emulator on a windowing system.
One of the issues is stty output isn't specified and for example Solaris reports "columns = xx" while Linux reports "columns xx".
You should check a sample stty output with the other Unix variants you plan to support and modify my script should other discrepancies appear then you'll have a reasonably "stable" solution.
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