How sshd manages globals

Stuart Henderson stu at
Sun Jul 14 20:58:20 AEST 2019

On 2019/07/14 11:45, Nuno Gonçalves wrote:
> Hi,
> I am looking for a small explanation of how some sshd code is architected.
> sshd uses this 2 globals:
> Authctxt *the_authctxt = NULL;
> struct sshauthopt *auth_opts = NULL;
> Since sshd can have several simultaneous unauthenticated connections
> each on their own thread, how can this globals handle concurrency?
> I appreciate any help to understand this.

OpenSSH does not use threads, it forks a new process.

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