[erlang-questions] Could not open pty master

[Iván Martínez]

Thank you. Looks like SELinux has nothing to do with the issue:

$ setenforce 0
setenforce: SELinux is disabled


2014-09-25 3:21 GMT+02:00 zxq9 <zxq9@REDACTED>:

> On Wednesday 24 September 2014 21:00:32 Iván Martínez wrote:
> > Hello all,
> > Does anyone know why I'm having the following issue with a CentOS 7
> system
> > with kernel 3.10.23?:
> >
> > $ run_erl priv/ log "erl"
> > run_erl:187 [6505] Wed Sep 24 18:42:39 2014
> > errno=1 'Operation not permitted'
> > Could not open pty master
> >
> > It works as super user. It also works in a Fedora 20 system with kernel
> > 3.16. I couldn't find any difference in user groups or /dev file permits
> > between both systems. Starting with a user with UID above or below
> UID_MIN
> > doesn't make any difference.  I don't think it matters, but the only
> > difference I could find is that the CentOS has many /dev/pty* files
> already
> > created, while the Fedora doesn't have any.
>
> You might be running into SELinux permission issues. To find out try doing
> "setenforce 0" and then running it again. If that works, use a tool like
> audit2allow or audit2why to create a policy that will permit the actions
> you
> require to run your program. I haven't kept up with the Fedora/RHEL world
> since 7 came out, but Dan Walsh's blog and Red Hat's SELinux docs have been
> good resources on this in the past.
>
> Of course, you might have a totally different issue, but SELinux booleans
> and
> audit logs are the first thing I check on a Fedora-type distro when
> something
> doesn't work but looks like it should.
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