strlcpy and strlcat added to glibc 2.38

Jeffrey Walton

2023-07-18 08:50:02 UTC

On Tue, Jul 18, 2023 at 4:16 AM John Paul Adrian Glaubitz

Post by John Paul Adrian Glaubitz
Some of you may remember the discussion we had regarding the »hfs« package
and the efforts to port it to Linux [1]. One of the issues with the package was
the use of strlcpy and strlcat which have so been unsupported by glibc.

I think you can thank Ulrich Drepper for that

Post by John Paul Adrian Glaubitz
this patch implements the string functions strlcat and
strlcpy for gnu libc.

This is horribly inefficient BSD crap. Using these function only
leads to other errors. Correct string handling means that you always
know how long your strings are and therefore you can you memcpy
(instead of strcpy).

And the irony... glibc makes regular appearances on BugTraq for its
mishandling of C strings.
https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=glibc .

Post by John Paul Adrian Glaubitz
Luckily, this has changed now and support for both has been added to glibc [2]
meaning the Linux port of the »hfs« package has become slightly easier ;-).

Glad to hear it.

Post by John Paul Adrian Glaubitz
FWIW, I will resume working on the »hfs« package later this week as my vacation
starts tomorrow.

Rub it in :)

Post by John Paul Adrian Glaubitz

[1] https://lists.debian.org/debian-powerpc/2023/05/msg00094.html
[2] https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=454a20c8756c9c1d55419153255fc7692b3d2199

Jeff