Public bug reported:
libnss-{resolve,mymachines,myhostname} automatically add/remove
themselves from /etc/nsswitch.conf on installation/removal.
But when (manually) adding NSS action specifiers, these do not get
removed along.
TEST CASE:
* Install libnss-machines. This will change the "hosts" line in
/etc/nsswitch.conf from e. g. "files dns" to "files dns mymachines".
* Edit the file to add an action specifier: "files dns mymachines
[!UNAVAIL=return]"
* Remove/purge libnss-machines.
* In current xenial (229-4ubuntu7)/yakkety (231-6) the hosts line ends up as
"files dns [!UNAVAIL=return]", i. e. the action specifier now applies to "dns"
but should have been removed.
* With the fixed version, the action specifier is completely gone.
* Re-test with installing libnss-resolve (which inserts itself before "dns")
and modifying to "files resolve [!UNAVAIL=return] dns [foo=bar]", then purge
libnss-resolve again -- this should again remove the [!UNAVAIL=return] but
*NOT* "dns [foo=bar]".
** Affects: systemd (Ubuntu)
Importance: Medium
Assignee: Martin Pitt (pitti)
Status: In Progress
** Affects: systemd (Ubuntu Xenial)
Importance: Undecided
Status: Triaged
** Also affects: systemd (Ubuntu Xenial)
Importance: Undecided
Status: New
** Changed in: systemd (Ubuntu)
Importance: Undecided => Medium
** Changed in: systemd (Ubuntu)
Assignee: (unassigned) => Martin Pitt (pitti)
** Changed in: systemd (Ubuntu)
Milestone: None => ubuntu-16.09
** Changed in: systemd (Ubuntu Xenial)
Status: New => Triaged
** Changed in: systemd (Ubuntu)
Status: New => In Progress
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https://bugs.launchpad.net/bugs/1625584
Title:
Removing libnss-* does not remove corresponding options
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