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This article is from the 3b1 computers FAQ, by John B. Bunch with numerous contributions by others.

8.4. How do I stop that darn double-ESC mode on console windows?

Some programs that use the TAM (Terminal Access Method) library can leave the keyboard (really the shell window) in a strange state after leaving. This state is characterized by each press of the ESC key injecting two 0x1b characters into the input stream. This generally doesn't help anybody -- vi beeps too much, emacs is unusable, etc. The fix is to issue the following ioctl from a C program:

	#include <sys/window.h>
	ioctl(0, WIOCSESC, 0);	/* to turn off double-esc mode */

If you really want it back again, do the following:

	ioctl(0, WIOCSESC, 1);	/* to turn on double-esc mode */

 

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