# Copyright 2011-2021 Gentoo Authors # Distributed under the terms of the GNU General Public License v2 # @ECLASS: systemd.eclass # @MAINTAINER: # systemd@gentoo.org # @SUPPORTED_EAPIS: 5 6 7 8 # @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 case ${EAPI} in 5|6|7|8) ;; *) die "${ECLASS}: EAPI ${EAPI:-0} not supported" ;; esac inherit toolchain-funcs if [[ ${EAPI} == [56] ]]; 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 # https://github.com/pkgconf/pkgconf/issues/205 local -x PKG_CONFIG_FDO_SYSROOT_RULES=1 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_systemunitdir # @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() { debug-print-function ${FUNCNAME} "${@}" echo "${EPREFIX}$(_systemd_get_systemunitdir)" } # @FUNCTION: systemd_get_unitdir # @DESCRIPTION: # Deprecated alias for systemd_get_systemunitdir. systemd_get_unitdir() { [[ ${EAPI} == 5 ]] || die "${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() { 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() { 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() { debug-print-function ${FUNCNAME} "${@}" echo "${EPREFIX}$(_systemd_get_systemgeneratordir)" } # @FUNCTION: _systemd_get_systempresetdir # @INTERNAL # @DESCRIPTION: # Get unprefixed systempresetdir. _systemd_get_systempresetdir() { _systemd_get_dir systemdsystempresetdir /lib/systemd/system-preset } # @FUNCTION: systemd_get_systempresetdir # @DESCRIPTION: # Output the path for the systemd system preset directory (not including # ${D}). This function always succeeds, even if systemd is not installed. systemd_get_systempresetdir() { debug-print-function ${FUNCNAME} "${@}" echo "${EPREFIX}$(_systemd_get_systempresetdir)" } # @FUNCTION: systemd_dounit # @USAGE: <unit>... # @DESCRIPTION: # Install systemd unit(s). Uses doins, thus it is fatal. 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. 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. 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. 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_enable_service # @USAGE: <target> <service> # @DESCRIPTION: # Enable service in desired target, e.g. install a symlink for it. # Uses dosym, thus it is fatal. 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. # # 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() { [[ ${EAPI} == 5 ]] || die "${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() { [[ ${EAPI} == 5 ]] || die "${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 ${ret} } # @FUNCTION: systemd_reenable # @USAGE: <unit> ... # @DESCRIPTION: # Re-enables units if they are currently enabled. This resets symlinks to the # defaults specified in the [Install] section. # # This function is intended to fix broken symlinks that result from moving # the systemd system unit directory. It should be called from pkg_postinst # for system units that define the 'Alias' option in their [Install] section. # It is not necessary to call this function to fix dependency symlinks # generated by the 'WantedBy' and 'RequiredBy' options. systemd_reenable() { type systemctl &>/dev/null || return 0 local x for x; do if systemctl --quiet --root="${ROOT:-/}" is-enabled "${x}"; then systemctl --root="${ROOT:-/}" reenable "${x}" fi done }