[gentoo-dev] [RFC] new tmpfilesd.eclass

[Sergei Trofimovich <slyfox@gentoo.org>]

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As gentoo switched to /var/run/ -> /run in tmpfs recently
people got into problems [1] of missing directories like:

    /var/run/screen/
    /var/run/openfire/
    /var/run/proftpd/

they did bite me personally.

openrc-0.10 brought [2] basic support for systemd's tmpfiles'd:

  http://0pointer.de/public/systemd-man/tmpfiles.d.html

But there is no simple way to install such helpers from ebuilds.
The tmpfiles.d is aimed to help in such situations.

I've picked proftpd as an example as it's situation is very similar
to screen's situation. There is inetd mode (opposed to standalone
mode) when you don't have any init.d code to create /var/run/
directories for you. Thus tmpfiles.d for the rescue.

See attach for the whole eclass code. It's almost a copy of Michał's
bash-completion-r1.eclass which I find very easy to use.

I'll show eclass usage example for proftpd:

--- proftpd-1.3.4a-r1.ebuild    2012-05-29 20:16:51.000000000 +0300
+++ proftpd-1.3.4a-r2.ebuild    2012-08-15 23:10:49.000000000 +0300
@@ -3,7 +3,7 @@
 # $Header: /var/cvsroot/gentoo-x86/net-ftp/proftpd/proftpd-1.3.4a-r1.ebuild,v 1.2 2012/05/13 10:49:47 swift Exp $
 
 EAPI=4
-inherit eutils
+inherit eutils tmpfilesd
 
 MOD_CASE="0.7"
 MOD_CLAMAV="0.11rc"
@@ -216,6 +216,8 @@
                docinto rfc
                dodoc doc/rfc/*.txt
        fi
+
+       newtmpfilesd ${FILESDIR}/tmpfilesd.conf ${PN}.conf
 }
 
 pkg_postinst() {

The caveats:
- files get created only if I run /lib/rc/sh/tmpfiles.sh manually
- haven't tested with systemd, but i'd expect it to work

Thanks!

[1]: https://bugs.gentoo.org/show_bug.cgi?id=361349
[2]: https://bugs.gentoo.org/show_bug.cgi?id=396003

-- 

  Sergei

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# Copyright 1999-2012 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header:  $

# @ECLASS: tmpfilesd.eclass
# @MAINTAINER:
# slyfox@gentoo.org
# @AUTHOR:
# Based on bash-completion-r1.eclass by Michał Górny <mgorny@gentoo.org>.
# @BLURB: Helpers to install tmpfiles.d files.
# @DESCRIPTION:
# As described in http://0pointer.de/public/systemd-man/tmpfiles.d.html
# helpers allow installing package's tmpfiles.d into /usr/lib/tmpfiles.d
# @EXAMPLE:
#
# @CODE
# EAPI=4
#
# src_install() {
# 	default
#
# 	newtmpfilesd ${FILESDIR}/tmpfilesd.conf ${PN}.conf
# }
# @CODE

case ${EAPI:-0} in
	0|1|2|3|4) ;;
	*) die "EAPI ${EAPI} is unknown."
esac

# @FUNCTION: dotmpfilesd
# @USAGE: file [...]
# @DESCRIPTION:
# Install tmpfiles.d files passed as args. Has EAPI-dependant failure
# behavior (like doins).
dotmpfilesd() {
	debug-print-function ${FUNCNAME} "${@}"

	(
		insinto /usr/lib/tmpfiles.d
		doins "${@}"
	)
}

# @FUNCTION: newtmpfilesd
# @USAGE: file newname
# @DESCRIPTION:
# Install tmpfiles.d file under a new name. Has EAPI-dependant failure
# behavior (like newins).
newtmpfilesd() {
	debug-print-function ${FUNCNAME} "${@}"

	(
		insinto /usr/lib/tmpfiles.d
		newins "${@}"
	)
}

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