* nixos/postgresql: support 0750 for data directory
This is rework of part of https://github.com/NixOS/nixpkgs/pull/46670.
My usecase was to be able to inspect PG datadir as wheel user.
PG11 now allows starting server with 0750 mask for data dir.
`groupAccess = true` now does this automatically. The only thing you have to do
is to set group ownership.
For PG10 and below, I've described a hack how this can be done. Before this PR
hack was impossible. The hack isn't ideal, because there is short
period of time when dir mode is 0700, so I didn't want to make it official.
Test/example is present too.
* postgresql: allow changing initidb arguments via module system
Closes https://github.com/NixOS/nixpkgs/issues/18829
+ some cleanups
* addressed review comments and some fixes
* whoops
* change groupAccess to tristate, to not force `chmod` on dataDir.
Making mask either 0700 or 0750 is too restrictive..
* WIP
* let's not support group mode for versions pre-11.
The only fix is to change mode to 0700 before start, because otherwise postgresql
doesn't start, and error is non-obvious.
In some cases, /dev/stderr may not point to a sensible location. For
example, running nixos-enter inside a systemd unit where the unit's
StandardOutput and StandardError are set to be sockets. In these
cases, this line would fail.
Piping to fd2 directly works just as well, even under strange and
twisted executions.
Co-authored-by: Michael Bishop <michael.bishop@iohk.io>
Originally added in [1], and iwd added StateDirectory to its services
in [2] -- 4 days later.
("StateDirectory wasn't used when tmpfile snippet was added to NixOS")
(nevermind git -> release delay)
[1] 6e54e9253a
[2] upstream iwd git rev: 71ae0bee9c6320dae0083ed8c1700bc8fff1defb
Some display managers (e.g. SDDM) set the XDG_CURRENT_DESKTOP variable accroding to this parameter.
If this variable is not defined, there will be some problems (e.g. MATE doesn't have icons on the desktop).
Fixes https://github.com/NixOS/nixpkgs/issues/71427
3c74e48d9c was a bit too much, it updated
permissions of all files recursively, causing files to be readable by
the group.
This isn't a problem immediately after bootup, but on a new activation,
as tmpfiles.d get restarted then, updating the permission bits of
now-existing files.
This updates the `Z` to be a `z` (the non-recursive variant), and adds a
`d` to ensure a directory is created (which should be covered by the
initrd shell script anyway)
Due to the support of the systemd-logind API the udev rules aren't
required anymore which renders this module useless [0].
Note: brightnessctl should now require a working D-Bus setup and a valid
local logind session for this to work.
[0]: https://github.com/NixOS/nixpkgs/pull/79663
