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gentoo-overlay/eclass/systemd.eclass

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# Copyright 1999-2017 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# @ECLASS: systemd.eclass
# @MAINTAINER:
# systemd@gentoo.org
# @SUPPORTED_EAPIS: 0 1 2 3 4 5 6 7
# @BLURB: helper functions to install systemd units
# @DESCRIPTION:
# This eclass provides a set of functions to install unit files for
# sys-apps/systemd within ebuilds.
# @EXAMPLE:
#
# @CODE
# inherit systemd
#
# src_configure() {
# local myconf=(
# --enable-foo
# --with-systemdsystemunitdir="$(systemd_get_systemunitdir)"
# )
#
# econf "${myconf[@]}"
# }
# @CODE
inherit toolchain-funcs
case ${EAPI:-0} in
0|1|2|3|4|5|6|7) ;;
*) die "${ECLASS}.eclass API in EAPI ${EAPI} not yet established."
esac
if [[ ${EAPI:-0} == [0123456] ]]; then
DEPEND="virtual/pkgconfig"
else
BDEPEND="virtual/pkgconfig"
fi
# @FUNCTION: _systemd_get_dir
# @USAGE: <variable-name> <fallback-directory>
# @INTERNAL
# @DESCRIPTION:
# Try to obtain the <variable-name> variable from systemd.pc.
# If pkg-config or systemd is not installed, return <fallback-directory>
# instead.
_systemd_get_dir() {
[[ ${#} -eq 2 ]] || die "Usage: ${FUNCNAME} <variable-name> <fallback-directory>"
local variable=${1} fallback=${2} d
if $(tc-getPKG_CONFIG) --exists systemd; then
d=$($(tc-getPKG_CONFIG) --variable="${variable}" systemd) || die
d=${d#${EPREFIX}}
else
d=${fallback}
fi
echo "${d}"
}
# @FUNCTION: _systemd_get_unitdir
# @INTERNAL
# @DESCRIPTION:
# Get unprefixed unitdir.
_systemd_get_systemunitdir() {
_systemd_get_dir systemdsystemunitdir /lib/systemd/system
}
# @FUNCTION: systemd_get_systemunitdir
# @DESCRIPTION:
# Output the path for the systemd system unit directory (not including
# ${D}). This function always succeeds, even if systemd is not
# installed.
systemd_get_systemunitdir() {
has "${EAPI:-0}" 0 1 2 && ! use prefix && EPREFIX=
debug-print-function ${FUNCNAME} "${@}"
echo "${EPREFIX}$(_systemd_get_systemunitdir)"
}
# @FUNCTION: systemd_get_unitdir
# @DESCRIPTION:
# Deprecated alias for systemd_get_systemunitdir.
systemd_get_unitdir() {
[[ ${EAPI} == [012345] ]] || die "${FUNCNAME} is banned in EAPI 6, use systemd_get_systemunitdir instead"
systemd_get_systemunitdir
}
# @FUNCTION: _systemd_get_userunitdir
# @INTERNAL
# @DESCRIPTION:
# Get unprefixed userunitdir.
_systemd_get_userunitdir() {
_systemd_get_dir systemduserunitdir /usr/lib/systemd/user
}
# @FUNCTION: systemd_get_userunitdir
# @DESCRIPTION:
# Output the path for the systemd user unit directory (not including
# ${D}). This function always succeeds, even if systemd is not
# installed.
systemd_get_userunitdir() {
has "${EAPI:-0}" 0 1 2 && ! use prefix && EPREFIX=
debug-print-function ${FUNCNAME} "${@}"
echo "${EPREFIX}$(_systemd_get_userunitdir)"
}
# @FUNCTION: _systemd_get_utildir
# @INTERNAL
# @DESCRIPTION:
# Get unprefixed utildir.
_systemd_get_utildir() {
_systemd_get_dir systemdutildir /lib/systemd
}
# @FUNCTION: systemd_get_utildir
# @DESCRIPTION:
# Output the path for the systemd utility directory (not including
# ${D}). This function always succeeds, even if systemd is not
# installed.
systemd_get_utildir() {
has "${EAPI:-0}" 0 1 2 && ! use prefix && EPREFIX=
debug-print-function ${FUNCNAME} "${@}"
echo "${EPREFIX}$(_systemd_get_utildir)"
}
# @FUNCTION: _systemd_get_systemgeneratordir
# @INTERNAL
# @DESCRIPTION:
# Get unprefixed systemgeneratordir.
_systemd_get_systemgeneratordir() {
_systemd_get_dir systemdsystemgeneratordir /lib/systemd/system-generators
}
# @FUNCTION: systemd_get_systemgeneratordir
# @DESCRIPTION:
# Output the path for the systemd system generator directory (not including
# ${D}). This function always succeeds, even if systemd is not
# installed.
systemd_get_systemgeneratordir() {
has "${EAPI:-0}" 0 1 2 && ! use prefix && EPREFIX=
debug-print-function ${FUNCNAME} "${@}"
echo "${EPREFIX}$(_systemd_get_systemgeneratordir)"
}
# @FUNCTION: systemd_dounit
# @USAGE: <unit>...
# @DESCRIPTION:
# Install systemd unit(s). Uses doins, thus it is fatal in EAPI 4
# and non-fatal in earlier EAPIs.
systemd_dounit() {
debug-print-function ${FUNCNAME} "${@}"
(
insopts -m 0644
insinto "$(_systemd_get_systemunitdir)"
doins "${@}"
)
}
# @FUNCTION: systemd_newunit
# @USAGE: <old-name> <new-name>
# @DESCRIPTION:
# Install systemd unit with a new name. Uses newins, thus it is fatal
# in EAPI 4 and non-fatal in earlier EAPIs.
systemd_newunit() {
debug-print-function ${FUNCNAME} "${@}"
(
insopts -m 0644
insinto "$(_systemd_get_systemunitdir)"
newins "${@}"
)
}
# @FUNCTION: systemd_douserunit
# @USAGE: <unit>...
# @DESCRIPTION:
# Install systemd user unit(s). Uses doins, thus it is fatal in EAPI 4
# and non-fatal in earlier EAPIs.
systemd_douserunit() {
debug-print-function ${FUNCNAME} "${@}"
(
insopts -m 0644
insinto "$(_systemd_get_userunitdir)"
doins "${@}"
)
}
# @FUNCTION: systemd_newuserunit
# @USAGE: <old-name> <new-name>
# @DESCRIPTION:
# Install systemd user unit with a new name. Uses newins, thus it
# is fatal in EAPI 4 and non-fatal in earlier EAPIs.
systemd_newuserunit() {
debug-print-function ${FUNCNAME} "${@}"
(
insopts -m 0644
insinto "$(_systemd_get_userunitdir)"
newins "${@}"
)
}
# @FUNCTION: systemd_install_serviced
# @USAGE: <conf-file> [<service>]
# @DESCRIPTION:
# Install <conf-file> as the template <service>.d/00gentoo.conf.
# If <service> is not specified
# <conf-file> with the .conf suffix stripped is used
# (e.g. foo.service.conf -> foo.service.d/00gentoo.conf).
systemd_install_serviced() {
debug-print-function ${FUNCNAME} "${@}"
local src=${1}
local service=${2}
[[ ${src} ]] || die "No file specified"
if [[ ! ${service} ]]; then
[[ ${src} == *.conf ]] || die "Source file needs .conf suffix"
service=${src##*/}
service=${service%.conf}
fi
# avoid potentially common mistake
[[ ${service} == *.d ]] && die "Service must not have .d suffix"
(
insopts -m 0644
insinto /etc/systemd/system/"${service}".d
newins "${src}" 00gentoo.conf
)
}
# @FUNCTION: systemd_dotmpfilesd
# @USAGE: <tmpfilesd>...
# @DESCRIPTION:
# Install systemd tmpfiles.d files. Uses doins, thus it is fatal
# in EAPI 4 and non-fatal in earlier EAPIs.
systemd_dotmpfilesd() {
debug-print-function ${FUNCNAME} "${@}"
for f; do
[[ ${f} == *.conf ]] \
|| die 'tmpfiles.d files need to have .conf suffix.'
done
(
insopts -m 0644
insinto /usr/lib/tmpfiles.d/
doins "${@}"
)
}
# @FUNCTION: systemd_newtmpfilesd
# @USAGE: <old-name> <new-name>.conf
# @DESCRIPTION:
# Install systemd tmpfiles.d file under a new name. Uses newins, thus it
# is fatal in EAPI 4 and non-fatal in earlier EAPIs.
systemd_newtmpfilesd() {
debug-print-function ${FUNCNAME} "${@}"
[[ ${2} == *.conf ]] \
|| die 'tmpfiles.d files need to have .conf suffix.'
(
insopts -m 0644
insinto /usr/lib/tmpfiles.d/
newins "${@}"
)
}
# @FUNCTION: systemd_enable_service
# @USAGE: <target> <service>
# @DESCRIPTION:
# Enable service in desired target, e.g. install a symlink for it.
# Uses dosym, thus it is fatal in EAPI 4 and non-fatal in earlier
# EAPIs.
systemd_enable_service() {
debug-print-function ${FUNCNAME} "${@}"
[[ ${#} -eq 2 ]] || die "Synopsis: systemd_enable_service target service"
local target=${1}
local service=${2}
local ud=$(_systemd_get_systemunitdir)
local destname=${service##*/}
dodir "${ud}"/"${target}".wants && \
dosym ../"${service}" "${ud}"/"${target}".wants/"${destname}"
}
# @FUNCTION: systemd_enable_ntpunit
# @USAGE: <NN-name> <service>...
# @DESCRIPTION:
# Add an NTP service provider to the list of implementations
# in timedated. <NN-name> defines the newly-created ntp-units.d priority
# and name, while the remaining arguments list service units that will
# be added to that file.
#
# Uses doins, thus it is fatal in EAPI 4 and non-fatal in earlier
# EAPIs.
#
# Doc: https://www.freedesktop.org/wiki/Software/systemd/timedated/
systemd_enable_ntpunit() {
debug-print-function ${FUNCNAME} "${@}"
if [[ ${#} -lt 2 ]]; then
die "Usage: systemd_enable_ntpunit <NN-name> <service>..."
fi
local ntpunit_name=${1}
local services=( "${@:2}" )
if [[ ${ntpunit_name} != [0-9][0-9]-* ]]; then
die "ntpunit.d file must be named NN-name where NN are digits."
elif [[ ${ntpunit_name} == *.list ]]; then
die "The .list suffix is appended implicitly to ntpunit.d name."
fi
local unitdir=$(systemd_get_systemunitdir)
local s
for s in "${services[@]}"; do
if [[ ! -f "${D}${unitdir}/${s}" ]]; then
die "ntp-units.d provider ${s} not installed (yet?) in \${D}."
fi
echo "${s}" >> "${T}"/${ntpunit_name}.list || die
done
(
insopts -m 0644
insinto "$(_systemd_get_utildir)"/ntp-units.d
doins "${T}"/${ntpunit_name}.list
)
local ret=${?}
rm "${T}"/${ntpunit_name}.list || die
return ${ret}
}
# @FUNCTION: systemd_with_unitdir
# @USAGE: [<configure-option-name>]
# @DESCRIPTION:
# Note: deprecated and banned in EAPI 6. Please use full --with-...=
# parameter for improved ebuild readability.
#
# Output '--with-systemdsystemunitdir' as expected by systemd-aware configure
# scripts. This function always succeeds. Its output may be quoted in order
# to preserve whitespace in paths. systemd_to_myeconfargs() is preferred over
# this function.
#
# If upstream does use invalid configure option to handle installing systemd
# units (e.g. `--with-systemdunitdir'), you can pass the 'suffix' as an optional
# argument to this function (`$(systemd_with_unitdir systemdunitdir)'). Please
# remember to report a bug upstream as well.
systemd_with_unitdir() {
[[ ${EAPI:-0} != [012345] ]] && die "${FUNCNAME} is banned in EAPI ${EAPI}, use --with-${1:-systemdsystemunitdir}=\"\$(systemd_get_systemunitdir)\" instead"
debug-print-function ${FUNCNAME} "${@}"
local optname=${1:-systemdsystemunitdir}
echo --with-${optname}="$(systemd_get_systemunitdir)"
}
# @FUNCTION: systemd_with_utildir
# @DESCRIPTION:
# Note: deprecated and banned in EAPI 6. Please use full --with-...=
# parameter for improved ebuild readability.
#
# Output '--with-systemdsystemutildir' as used by some packages to install
# systemd helpers. This function always succeeds. Its output may be quoted
# in order to preserve whitespace in paths.
systemd_with_utildir() {
[[ ${EAPI:-0} != [012345] ]] && die "${FUNCNAME} is banned in EAPI ${EAPI}, use --with-systemdutildir=\"\$(systemd_get_utildir)\" instead"
debug-print-function ${FUNCNAME} "${@}"
echo --with-systemdutildir="$(systemd_get_utildir)"
}
# @FUNCTION: systemd_update_catalog
# @DESCRIPTION:
# Update the journald catalog. This needs to be called after installing
# or removing catalog files. This must be called in pkg_post* phases.
#
# If systemd is not installed, no operation will be done. The catalog
# will be (re)built once systemd is installed.
#
# See: https://www.freedesktop.org/wiki/Software/systemd/catalog
systemd_update_catalog() {
debug-print-function ${FUNCNAME} "${@}"
[[ ${EBUILD_PHASE} == post* ]] \
|| die "${FUNCNAME} disallowed during ${EBUILD_PHASE_FUNC:-${EBUILD_PHASE}}"
# Make sure to work on the correct system.
local journalctl=${EPREFIX}/usr/bin/journalctl
if [[ -x ${journalctl} ]]; then
ebegin "Updating systemd journal catalogs"
journalctl --update-catalog
eend $?
else
debug-print "${FUNCNAME}: journalctl not found."
fi
}
# @FUNCTION: systemd_is_booted
# @DESCRIPTION:
# Check whether the system was booted using systemd.
#
# This should be used purely for informational purposes, e.g. warning
# user that he needs to use systemd. Installed files or application
# behavior *must not* rely on this. Please remember to check MERGE_TYPE
# to not trigger the check on binary package build hosts!
#
# Returns 0 if systemd is used to boot the system, 1 otherwise.
#
# See: man sd_booted
systemd_is_booted() {
debug-print-function ${FUNCNAME} "${@}"
[[ -d /run/systemd/system ]]
local ret=${?}
debug-print "${FUNCNAME}: [[ -d /run/systemd/system ]] -> ${ret}"
return ${ret}
}
# @FUNCTION: systemd_tmpfiles_create
# @USAGE: <tmpfilesd> ...
# @DESCRIPTION:
# Invokes systemd-tmpfiles --create with given arguments.
# Does nothing if ROOT != / or systemd-tmpfiles is not in PATH.
# This function should be called from pkg_postinst.
#
# Generally, this function should be called with the names of any tmpfiles
# fragments which have been installed, either by the build system or by a
# previous call to systemd_dotmpfilesd. This ensures that any tmpfiles are
# created without the need to reboot the system.
systemd_tmpfiles_create() {
debug-print-function ${FUNCNAME} "${@}"
[[ ${EBUILD_PHASE} == postinst ]] || die "${FUNCNAME}: Only valid in pkg_postinst"
[[ ${#} -gt 0 ]] || die "${FUNCNAME}: Must specify at least one filename"
[[ ${ROOT} == / ]] || return 0
type systemd-tmpfiles &> /dev/null || return 0
systemd-tmpfiles --create "${@}"
}
# @FUNCTION: systemd_reenable
# @USAGE: <unit> ...
# @DESCRIPTION:
# Re-enables units if they are currently enabled. This resets symlinks to the
# defaults specified in the [Install] section.
#
# This function is intended to fix broken symlinks that result from moving
# the systemd system unit directory. It should be called from pkg_postinst
# for system units that define the 'Alias' option in their [Install] section.
# It is not necessary to call this function to fix dependency symlinks
# generated by the 'WantedBy' and 'RequiredBy' options.
systemd_reenable() {
type systemctl &>/dev/null || return 0
local x
for x; do
if systemctl --quiet --root="${ROOT:-/}" is-enabled "${x}"; then
systemctl --root="${ROOT:-/}" reenable "${x}"
fi
done
}