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Jamey Sharp 597563d248 nixos/nscd: let systemd manage directories
Previously this module created both /var/db/nscd and /run/nscd using
shell commands in a preStart script. Note that both of these paths are
hard-coded in the nscd source. (Well, the latter is actually
/var/run/nscd but /var/run is a symlink to /run so it works out the
same.)

/var/db/nscd is only used if the nscd.conf "persistent" option is turned
on for one or more databases, which it is not in our default config
file. I'm not even sure persistent mode can work under systemd, since
`nscd --shutdown` is not synchronous so systemd will always
unceremoniously kill nscd without reliably giving it time to mark the
databases as unused. Nonetheless, if someone wants to use that option,
they can ensure the directory exists using systemd.tmpfiles.rules.

systemd can create /run/nscd for us with the RuntimeDirectory directive,
with the added benefit of causing systemd to delete the directory on
service stop or restart. The default value of RuntimeDirectoryMode is
755, the same as the mode which this module was using before.

I don't think the `rm -f /run/nscd/nscd.pid` was necessary after NixOS
switched to systemd and used its PIDFile directive, because systemd
deletes the specified file after the service stops, and because the file
can't persist across reboots since /run is a tmpfs. Even if the file
still exists when nscd starts, it's only a problem if the pid it
contains has been reused by another process, which is unlikely. Anyway,
this change makes that deletion even less necessary, because now systemd
deletes the entire /run/nscd directory when the service stops.
2019-07-03 12:39:48 -07:00
.github PULL_REQUEST_TEMPLATE: "Assured whether" -> "Ensured that" 2019-07-01 11:22:48 +01:00
doc Merge pull request #61385 from eraserhd/kakoune-plugins 2019-06-26 20:36:17 +00:00
lib treewide: remove unused variables (#63177) 2019-06-16 19:59:05 +00:00
maintainers Merge pull request #63656 from killercup/dua-2.1.3 2019-07-03 07:03:12 -04:00
nixos nixos/nscd: let systemd manage directories 2019-07-03 12:39:48 -07:00
pkgs way-cooler: Mark as broken (#64138) 2019-07-03 18:51:02 +02:00
.editorconfig Modified .editorconfig to apply indentation style to docbook files 2018-04-05 09:18:20 +10:00
.gitattributes gitattributes: disable merge=union in all-packages 2018-03-27 11:03:03 -05:00
.gitignore Replace androidenv by new implementation 2018-12-18 21:16:06 +01:00
.version 19.09 is Loris. 2019-02-25 23:21:14 +01:00
COPYING COPYING: include 2019 2019-03-18 19:55:33 -07:00
default.nix Fix local path to release notes in error message 2018-10-08 05:43:15 -05:00
README.md README: 18.09 -> 19.03 2019-04-28 19:15:08 +02:00

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