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|
#!/bin/bash
# -*- mode: shell-script; indent-tabs-mode: true; tab-width: 4; -*-
# Creates system users and groups, based on files in the format described
# in sysusers.d(5). Replacement for systemd-sysusers(8) for the use of RPM
#
# USAGE:
#
# sysusers.sh [--root ROOTDIR] [--replace CONFIGFILE] [CONFIGFILE...]
#
# SEE ALSO systemd-sysusers(8)
#
# Based on sysusers.generate-pre.sh from the Fedora systemd package
SYSTEMDIR=/usr/lib/sysusers.d
RUNTIMEDIR=/run/sysusers.d
SYSTEMCONFDIR=/etc/sysusers.d
ROOT=/
REPLACE=#
while test $# -gt 0 ; do
case "${1}" in
--root )
shift
ROOT=${1}
shift
;;
--replace )
shift
REPLACE=${1}
shift
;;
--help )
cat <<EOF
sysusers.sh - Creates system users and groups, based on files in the
format described in sysusers.d(5). Replacement for systemd-sysusers(8)
for the use of RPM.
USAGE:
sysusers.sh [--root ROOTDIR] [--replace CONFIGFILE] [CONFIGFILE...]
SEE ALSO systemd-sysusers(8)
EOF
shift
;;
* )
break
;;
esac
done
hasuser() {
grep "^${1}:" "$ROOT"/etc/passwd >/dev/null
}
hasuid() {
cut -d: -f3 "$ROOT"/etc/passwd | grep "${1}" >/dev/null
}
hasgroup() {
grep "^${1}:" "$ROOT"/etc/group >/dev/null
}
user() {
local user="$1"
local uid="$2"
local desc="$3"
local group="$4"
local home="$5"
local shell="$6"
local expire="$7"
[ "$desc" = '-' ] && desc=
{ [ "$home" = '-' ] || [ "$home" = '' ]; } && home=/
{ [ "$shell" = '-' ] || [ "$shell" = '' ]; } && shell=/sbin/nologin
if [ "$uid" = '-' ] || [ "$uid" = '' ]; then
if ! hasuser "$user" ; then
useradd -R "$ROOT" -r -g "${group}" -d "${home}" -s "${shell}" -c "${desc}" "${user}" || :
fi
else
if ! hasuser "${user}" ; then
if ! hasuid "${uid}" ; then
useradd -R "$ROOT" -r -u "${uid}" -g "${group}" -d "${home}" -s "${shell}" -c "${desc}" "${user}" || :
else
useradd -R "$ROOT" -r -g "${group}" -d "${home}" -s "${shell}" -c "${desc}" "${user}" || :
fi
fi
fi
if [[ $expire ]]; then
usermod -R "$ROOT" -e 1 "${user}"
fi
}
group() {
local group="$1"
local gid="$2"
if [ "$gid" = '-' ]; then
hasgroup "${group}" || groupadd -R "$ROOT" -f -r "${group}" || :
else
hasgroup "${group}" || groupadd -R "$ROOT" -f -g "${gid}" -r "${group}" || :
fi
}
addtogroup() {
local user="$1"
local group="$2"
group "${group}" "-"
user "${user}" "-" "" "${group}" "" "" ""
usermod -R "$ROOT" -a -G "${group}" "$user" || :
}
parse() {
local line arr expire
while read -r line || [ -n "$line" ] ; do
{ [ "${line:0:1}" = '#' ] || [ "${line:0:1}" = ';' ]; } && continue
line="${line## *}"
[ -z "$line" ] && continue
mapfile -t arr < <(xargs -n1 <<<"$line")
expire=""
case "${arr[0]}" in
('u' | 'u!')
if [[ "${arr[0]}" == 'u!' ]]; then
expire="1";
fi
if [[ "${arr[2]}" == *":"* ]]; then
user "${arr[1]}" "${arr[2]%:*}" "${arr[3]}" "${arr[2]#*:}" "${arr[4]}" "${arr[5]}" $expire
else
group "${arr[1]}" "${arr[2]}"
user "${arr[1]}" "${arr[2]}" "${arr[3]}" "${arr[1]}" "${arr[4]}" "${arr[5]}" $expire
fi
;;
('g')
group "${arr[1]}" "${arr[2]}"
;;
('m')
addtogroup "${arr[1]}" "${arr[2]}"
;;
esac
done
}
# Make sure etc and the user/group files exist
mkdir -p "$ROOT"/etc/
[ -e "$ROOT"/etc/passwd ] || touch "$ROOT"/etc/passwd
[ -e "$ROOT"/etc/shadow ] || touch "$ROOT"/etc/shadow
[ -e "$ROOT"/etc/group ] || touch "$ROOT"/etc/group
# read files from command line
for fn in "$@"; do
# check if file is replaced by one with higher priority
REPLACEDIR=$(dirname "$REPLACE")
REPLACENAME=$(basename "$REPLACE")
if [[ "$REPLACEDIR" == "${SYSTEMDIR}" ]] ; then
if [ -f "${ROOT}${RUNTIMEDIR}/${REPLACENAME}" ] ; then
continue
fi
if [ -f "${ROOT}${SYSTEMCONFDIR}/${REPLACENAME}" ] ; then
continue
fi
fi
if [[ "$REPLACEDIR" == "$RUNTIMEDIR" ]] ; then
if [ -f "${ROOT}${SYSTEMCONFDIR}/${REPLACENAME}" ] ; then
continue
fi
fi
if [ "-" = "$fn" ]; then
parse <&0
else
[ -r "$fn" ] || continue
parse <"$fn"
fi
done
|
