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| author | Paul Eggert <eggert@cs.ucla.edu> | 2023-04-08 13:51:26 -0700 |
|---|---|---|
| committer | Paul Eggert <eggert@cs.ucla.edu> | 2023-04-08 13:53:22 -0700 |
| commit | f173e27272e6e37cab016f9ef3f90d3e1189329f (patch) | |
| tree | 5436a489f0c43f98877687f7662c1550aa75957f /manual/stdio.texi | |
| parent | 1fb225923a1da5dd54d4e7460ccb7fcd12879982 (diff) | |
| download | glibc-f173e27272e6e37cab016f9ef3f90d3e1189329f.tar.gz glibc-f173e27272e6e37cab016f9ef3f90d3e1189329f.tar.xz glibc-f173e27272e6e37cab016f9ef3f90d3e1189329f.zip | |
manual: document snprintf truncation better
Diffstat (limited to 'manual/stdio.texi')
| -rw-r--r-- | manual/stdio.texi | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/manual/stdio.texi b/manual/stdio.texi index c502a21036..3820a24f3e 100644 --- a/manual/stdio.texi +++ b/manual/stdio.texi @@ -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 |