[sudo-users] Plugins and signal handlers

Todd C. Miller Todd.Miller at sudo.ws
Tue Mar 19 15:31:50 MDT 2019

On Tue, 19 Mar 2019 16:26:51 -0500, Bryan Christ wrote:

> What are the ramifications if my I/O plugin installs a signal handler for
> SIGPIPE?  Would that trample a handler that sudo already has installed?

That would probably cause problems.  Sudo sets SIGPIPE to SIG_IGN
and expects to receive EPIPE when writing to a closed pipe.

Is there any reason you can't just check errno for EPIPE instead?

 - todd

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