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# Copyright 2019-2024 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
# @ECLASS: acct-group.eclass
# @MAINTAINER:
# Michał Górny <mgorny@gentoo.org>
# Mike Gilbert <floppym@gentoo.org>
# @AUTHOR:
# Michael Orlitzky <mjo@gentoo.org>
# Michał Górny <mgorny@gentoo.org>
# @SUPPORTED_EAPIS: 7 8
# @BLURB: Eclass used to create and maintain a single group entry
# @DESCRIPTION:
# This eclass represents and creates a single group entry. The name
# of the group is derived from ${PN}, while (preferred) GID needs to
# be specified via ACCT_GROUP_ID. Packages (and users) needing the group
# in question should depend on the package providing it.
#
# Example:
# If your package needs group 'foo', you create 'acct-group/foo' package
# and add an ebuild with the following contents:
#
# @CODE
# EAPI=8
# inherit acct-group
# ACCT_GROUP_ID=200
# @CODE
#
# Then you add appropriate dependencies to your package. Note that
# the build system might need to resolve names, too. The dependency
# type(s) should be: BDEPEND if the group must be resolvable at build
# time (e.g. 'fowners' uses it in src_install), IDEPEND if it must be
# resolvable at install time (e.g. 'fowners' uses it in pkg_preinst),
# and RDEPEND in every case.
if [[ -z ${_ACCT_GROUP_ECLASS} ]]; then
_ACCT_GROUP_ECLASS=1
case ${EAPI} in
7|8) ;;
*) die "${ECLASS}: EAPI ${EAPI:-0} not supported" ;;
esac
inherit user-info
[[ ${CATEGORY} == acct-group ]] ||
die "Ebuild error: this eclass can be used only in acct-group category!"
# << Eclass variables >>
# @ECLASS_VARIABLE: ACCT_GROUP_NAME
# @DESCRIPTION:
# The name of the group. This is forced to ${PN} and the policy
# prohibits it from being changed. The variable is left writable for
# use in overlays; package naming restrictions would prohibit some
# otherwise-valid group names.
ACCT_GROUP_NAME=${PN}
# @ECLASS_VARIABLE: ACCT_GROUP_ID
# @REQUIRED
# @DESCRIPTION:
# Preferred GID for the new group. This variable is obligatory, and its
# value must be unique across all group packages. This can be overridden
# in make.conf through ACCT_GROUP_<UPPERCASE_USERNAME>_ID variable.
#
# Overlays should set this to -1 to dynamically allocate GID. Using -1
# in ::gentoo is prohibited by policy.
# @ECLASS_VARIABLE: ACCT_GROUP_ENFORCE_ID
# @DESCRIPTION:
# If set to a non-null value, the eclass will require the group to have
# specified GID. If the group already exists with another GID, or
# the GID is taken by another group, the install will fail.
: "${ACCT_GROUP_ENFORCE_ID:=}"
# << Boilerplate ebuild variables >>
: "${DESCRIPTION:="System group: ${ACCT_GROUP_NAME}"}"
: "${SLOT:=0}"
: "${KEYWORDS:=~alpha amd64 arm arm64 hppa ~loong ~m68k ~mips ppc ppc64 ~riscv ~s390 sparc x86 ~amd64-linux ~x86-linux ~arm64-macos ~ppc-macos ~x64-macos ~x64-solaris}"
S=${WORKDIR}
# << Phase functions >>
# @FUNCTION: acct-group_pkg_pretend
# @DESCRIPTION:
# Performs sanity checks for correct eclass usage, and early-checks
# whether requested GID can be enforced.
acct-group_pkg_pretend() {
debug-print-function ${FUNCNAME} "${@}"
# verify ACCT_GROUP_ID
[[ -n ${ACCT_GROUP_ID} ]] || die "Ebuild error: ACCT_GROUP_ID must be set!"
[[ ${ACCT_GROUP_ID} -ge -1 ]] || die "Ebuild error: ACCT_GROUP_ID=${ACCT_GROUP_ID} invalid!"
local group_id=${ACCT_GROUP_ID}
# check for the override, use PN in case this is an overlay and
# ACCT_GROUP_NAME is not PN and not valid in a bash variable name
local override_name=${PN^^}
local override_var=ACCT_GROUP_${override_name//-/_}_ID
if [[ -n ${!override_var} ]]; then
group_id=${!override_var}
[[ ${group_id} -ge -1 ]] || die "${override_var}=${group_id} invalid!"
fi
# check for ACCT_GROUP_ID collisions early
if [[ ${group_id} -ne -1 && -n ${ACCT_GROUP_ENFORCE_ID} ]]; then
local group_by_id=$(egetgroupname "${group_id}")
local group_by_name=$(egetent group "${ACCT_GROUP_NAME}")
if [[ -n ${group_by_id} ]]; then
if [[ ${group_by_id} != ${ACCT_GROUP_NAME} ]]; then
eerror "The required GID is already taken by another group."
eerror " GID: ${group_id}"
eerror " needed for: ${ACCT_GROUP_NAME}"
eerror " current group: ${group_by_id}"
die "GID ${group_id} taken already"
fi
elif [[ -n ${group_by_name} ]]; then
eerror "The requested group exists already with wrong GID."
eerror " groupname: ${ACCT_GROUP_NAME}"
eerror " requested GID: ${group_id}"
eerror " current entry: ${group_by_name}"
die "Group ${ACCT_GROUP_NAME} exists with wrong GID"
fi
fi
}
# @FUNCTION: acct-group_src_install
# @DESCRIPTION:
# Installs sysusers.d file for the group.
acct-group_src_install() {
debug-print-function ${FUNCNAME} "${@}"
# check for the override, use PN in case this is an overlay and
# ACCT_GROUP_NAME is not PN and not valid in a bash variable name
local override_name=${PN^^}
local override_var=ACCT_GROUP_${override_name//-/_}_ID
if [[ -n ${!override_var} ]]; then
ewarn "${override_var}=${!override_var} override in effect, support will not be provided."
_ACCT_GROUP_ID=${!override_var}
else
_ACCT_GROUP_ID=${ACCT_GROUP_ID}
fi
insinto /usr/lib/sysusers.d
newins - ${CATEGORY}-${ACCT_GROUP_NAME}.conf < <(
printf "g\t%q\t%q\n" \
"${ACCT_GROUP_NAME}" \
"${_ACCT_GROUP_ID/#-*/-}"
)
}
# @FUNCTION: acct-group_pkg_preinst
# @DESCRIPTION:
# Creates the group if it does not exist yet.
acct-group_pkg_preinst() {
debug-print-function ${FUNCNAME} "${@}"
if [[ ${EUID} -ne 0 || -n ${EPREFIX} ]]; then
einfo "Insufficient privileges to execute ${FUNCNAME[0]}"
return
fi
if egetent group "${ACCT_GROUP_NAME}" >/dev/null; then
elog "Group ${ACCT_GROUP_NAME} already exists"
return
fi
local opts=( --system )
if [[ ${_ACCT_GROUP_ID} -ne -1 ]] &&
! egetent group "${_ACCT_GROUP_ID}" >/dev/null
then
opts+=( --gid "${_ACCT_GROUP_ID}" )
fi
if [[ -n ${ROOT} ]]; then
opts+=( --prefix "${ROOT}" )
fi
elog "Adding group ${ACCT_GROUP_NAME}"
groupadd "${opts[@]}" "${ACCT_GROUP_NAME}" || die "groupadd failed with status $?"
}
fi
EXPORT_FUNCTIONS pkg_pretend src_install pkg_preinst
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