Re: [PATCH v2 1/5] strdup.3: drop mention of "the GNU GCC suite"

Alejandro Colomar (man-pages)
2021-09-15T19:49:21Z

On 9/14/21 2:40 PM, наб wrote:
> str[n]dupa() are available on every modern compiler platform,
> incl. Clang, ICC, &c.
>
> By shortening the third paragraph, it now reads
> strdupa() and strndupa() are similar,
> but use alloca(3) to allocate the buffer.
> pointing squarely to alloca(3), which is scary enough,
> so drop the extraneous warning, too ‒ athis clearly points to

(I fixed s/athis/this/)

> "see alloca(3) for the limitations of that allocator".
>
> Plus, it's not like malloc(3) doesn't have its problems, too,
> but I don't see those being touted in the first paragraph;
> reducing these to the bare minimum,
> strdup() copies into malloc(3) and you can free it with free(3),
> strndup() likewise, but up to n, and
> str[n]dupa() use alloca(3) instead ‒ be wary of what alloca(3) does!
> doesn't really make sense ‒ it's obvious that, ex definitione,
> alloca(3) suffers from alloca(3) problems and input limits,
> just like malloc(3) from the malloc(3) suite's.
>
> Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>

наб, patch applied!

Thanks,

Alex

> ---
> man3/strdup.3 | 3 ---
> 1 file changed, 3 deletions(-)
>
> diff --git a/man3/strdup.3 b/man3/strdup.3
> index 1e1ac34de..963de7d48 100644
> --- a/man3/strdup.3
> +++ b/man3/strdup.3
> @@ -99,9 +99,6 @@ and
> are similar, but use
> .BR alloca (3)
> to allocate the buffer.
> -They are available only when using the GNU
> -GCC suite, and suffer from the same limitations described in
> -.BR alloca (3).
> .SH RETURN VALUE
> On success, the
> .BR strdup ()
>

--
Alejandro Colomar
Linux man-pages comaintainer; https://www.kernel.org/doc/man-pages/