[OpenAFS] Check free space on AFS share before login
Thu, 2 Feb 2017 13:00:39 +0100
> On 2 Feb 2017, at 12:43, Richter, Michael <email@example.com> =
> Actually trying... The message comes to the user in LightDM. But I =
don't have access to the AFS share of the user. I assume it's because =
pam_exec runs before pam_afs_session:
> -- /etc/pam.d/common-auth
> auth [success=3D3 default=3Dignore] pam_krb5.so =
> auth [success=3D2 default=3Dignore] pam_unix.so nullok_secure =
> # auth against two domains via LDAP
> auth [success=3D1 default=3Dignore] pam_sss.so use_first_pass=20=
> auth requisite pam_deny.so
> auth required pam_permit.so
> # mount OwnCloud via webdav
> auth optional pam_mount.so=20
> auth optional pam_afs_session.so
> auth optional pam_cap.so
> # check free space in AFS
> auth requisite pam_exec.so stdout seteuid /opt/check_free.sh
> pam_afs_session is optional because there are users from another =
domain without an AFS share. The check_free script checks this by =
itself. I've set it to required too. But still the same. The script =
doesn't have access to the AFS share. According to the manual of PAM =
there is no way to set an order.
> Maybe this doesn't work because it's in the PAM process?
> Any hints?
First, let me second Jonathan's objection to produce any output in the =
common pam stack. I'd really really put it into /etc/pam.d/lightdm =
(right after the @include common-auth).
And you don't need read access to the volume root in order to find out. =
Parsing the output of "vos examine -format" should be simple enough.
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