doc: setRawMode needs write permission on Windows - #63856
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This was referenced Jun 12, 2026
StefanStojanovic
approved these changes
Jul 2, 2026
Fixes: nodejs#63852 Signed-off-by: Erik Demaine <edemaine@mit.edu>
trivikr
approved these changes
Jul 21, 2026
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Fixes #63852. After reporting that issue, I realized that this is probably how Windows is supposed to work, and I just needed to open the console with better permissions. This PR documents this solution so that others can figure this out more easily.
Summary of changes
Document that tty.ReadStream#setRawMode() on Windows requires write access to the console input buffer.
When opening "\\\\.\\CONIN$" with the fs.open() family of APIs, a read-only flag such as 'r' allows creating a readable TTY stream, but setRawMode() fails because Windows needs write permission to update the console mode. Recommend using a read/write flag such as 'r+'.