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manual: document snprintf truncation better

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Paul Eggert 2023-04-08 13:51:26 -07:00
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commit f173e27272
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5
manual/stdio.texi
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@ -2439,7 +2439,10 @@ If @var{size} is zero, nothing, not even the null byte, shall be written and
The return value is the number of characters which would be generated
for the given input, excluding the trailing null. If this value is
greater than or equal to @var{size}, not all characters from the result have
been stored in @var{s}. You should try again with a bigger output
been stored in @var{s}. If this happens, you should be wary of using
the truncated result as that could lead to security, encoding, or
other bugs in your program (@pxref{Truncating Strings}).
Instead, you should try again with a bigger output
string. Here is an example of doing this:
@smallexample