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List:       amanda-users
Subject:    Re: Debian: inetd required for amanda?
From:       Heiko Schlittermann <hs () schlittermann ! de>
Date:       2017-07-11 22:25:15
Message-ID: 20170711222515.ed4ayzpby5nu7gu5 () jumper ! schlittermann ! de
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Jon LaBadie <jon@jgcomp.com> (Di 11 Jul 2017 22:28:56 CEST):
> On Tue, Jul 11, 2017 at 03:36:48PM +0200, Heiko Schlittermann wrote:
> > Jon LaBadie <jon@jgcomp.com> (Di 11 Jul 2017 15:27:47 CEST):
> > 
> > > BTW the dash after ENVIRONMENT_FILE= is a typo?
> > > Or some systemd syntax.
> > 
> > No, in is just a "conditional", if the file does not exist, it is not
> > treated as an error (as it would be without the dash).
> > 
> With your normal accuracy I thought it might be some special syntax.

Sorry, probably I'm misinterpreting you…

It *is* special syntax for systemd's EnvironmentFile option.

    EnvironmentFile=/etc/default/amanda

*requires* the file to exist. But

    EnvironmentFile=-/etc/default/amanda

silently ignores the non-existing file (resulting in unset variables,
probably)

> > And, the Amanda Version I use (3.3.9) doesn't work with
> >     ListenStream=10080
> > As the socket is an "combined" ipv4/ipv6 socket and probaby the client
> > doesn't use the proper function calls to get the peer address.
> >     ListenStream=0.0.0.0:10080
> > solved this for me. One should investigate it a bit more probably.
> 
> On these systems the null address is not needed.
> Perhaps because I've done nothing with IPv6.

I wrote a short Perl script to find the peers address on two of my systems
(both Debian9, using systemd 232) and put in there in place of amandad.
(Because with ListenStream=10080 amandad complained about the peer
address being 0.0.0.0, which is nonsens.)

    #!/usr/bin/perl
    use 5.24.1;
    use strict;
    use warnings;

    use IO::Socket::INET;
    use IO::Socket::INET6;

    $| = 1;

    eval { say 'v6: ', IO::Socket::INET6->new_from_fd(0, 'r+')->peerhost };
    say "error: $@" if $@;

    eval { say 'v4: ', IO::Socket::INET->new_from_fd(0, 'r+')->peerhost };
    say "error: $@" if $@;

With ListenStream=<PORT> I get an eval error for the INET socket. With
ListenStream=0.0.0.0:<PORT> I get the peers IPv4 address in both cases
(IO::Socket::INET6 internally uses functions for both address families,
wheras IO::Socket::INET only expects AF_INET (ant not AF_INET6). I
think(!), amdand does about the same.

    Best regards from Dresden/Germany
    Viele Grüße aus Dresden
    Heiko Schlittermann
-- 
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