[PATCH v3] ungetc: Guarantee single char pushback

[Andreas Schwab]

On Dez 10 2024, Maciej W. Rozycki wrote:

>  I don't thing an app is allowed to poke at FILE in the first place, it's 
> supposed to be an opaque data type.

Right, except through the macros provided by <stdio.h>, the only reason
why the details are visible.

-- 
Andreas Schwab, SUSE Labs, schwab@suse.de
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