Adjust write tests for DISTDIR and PORTAGE_TMPDIR to work with automount directories

[floppym]

Bug: https://bugs.gentoo.org/485100
Bug: https://bugs.gentoo.org/890812

[floppym]

If anyone wants to test this, you can set up an automount using systemd via an fstab entry like this:

tmpfs /path/to/mount tmpfs mode=0770,uid=root,gid=portage,x-systemd.automount 0 0

Then run systemctl daemon-reload and systemctl start path-to-mount.automount.

[thesamesam]

I'll test this out tomorrow, thank you!

[thesamesam]

If anyone wants to test this, you can set up an automount using systemd via an fstab entry like this:

tmpfs /path/to/mount tmpfs mode=0770,uid=root,gid=portage,x-systemd.automount 0 0

Then run systemctl daemon-reload and systemctl start path-to-mount.automount.

The patch lgtm, but I couldn't reproduce the bug with:

tmpfs /mnt/testing-this-bug tmpfs mode=0770,uid=root,gid=portage,x-systemd.automount 0 0

I could see this when I start the automount:

systemd-1 on /mnt/testing-this-bug type autofs (rw,relatime,fd=60,pgrp=1,timeout=0,minproto=5,maxproto=5,direct)

And after Portage tries to use it with PORTAGE_TMPDIR=/mnt/testing-this-bug emerge -v1 google-chrome:

tmpfs on /mnt/testing-this-bug type tmpfs (rw,relatime,mode=770,gid=250,x-systemd.automount)

The merge succeeded.

[floppym]

To reproduce the original issue, I guess you would need to include "/portage" in the mount point. For example:

tmpfs /mnt/testing-this-bug/portage tmpfs mode=0770,uid=root,gid=portage,x-systemd.automount 0 0

Then, set PORTAGE_TMPDIR=/mnt/testing-this-bug

[thesamesam]

Ah, thanks! I should've clocked that. Let me try.

[thesamesam]

Reproduced, thanks!

It might be nice to put that in the commit message but it's not a big deal if you object.

[floppym]

Can do.