[pacman-dev] [PATCH 2/2] [WIP] run XferCommand via exec

Morten Linderud foxboron at archlinux.org
Thu Oct 17 15:01:46 UTC 2019

On Sun, Jun 09, 2019 at 10:13:55AM -0700, Andrew Gregory wrote:
> ---
> systemvp should pretty much be a drop-in replacement for system with
> the exception that it takes an argv array and uses exec.  If anybody
> wants to play with it to stress test it a little, I have
> a self-contained copy and test program at:
> https://github.com/andrewgregory/snippets/blob/systemv/c/systemv.c
>     * update docs
>     * fix debug logging
>     * should the command be run with PATH lookup (execv vs execvp)?
>     * Is the use of mmap with MAP_ANONYMOUS okay?  MAP_ANONYMOUS is
>       not POSIX but "most systems also support MAP_ANONYMOUS (or its
>       synonym MAP_ANON)" (mmap(2)).
>     * should we reset signals prior to exec'ing like we do with
>       hooks/scripts?

This issue was assigned CVE-2019-18182.


I'm fixing the AVG whenever pacman 5.2 is released if Xfer isn't included.

Morten Linderud
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