+ run useradd -r -g "${username}" -c "${username}" -s "${nologin}" -d / "${username}" && return 0
+ fi
+
+ # FreeBSD
+ if check_cmd pw
+ then
+ run pw useradd "${username}" -d / -g "${username}" -s "${nologin}" && return 0
+ fi
+
+ # BusyBox
+ if check_cmd adduser
+ then
+ run adduser -D -G "${username}" "${username}" && return 0
+ fi
+
+ echo >&2 "Failed to add ${username} user account !"
+
+ return 1
+}
+
+portable_add_group() {
+ local groupname="${1}"
+
+ getent group "${groupname}" > /dev/null 2>&1
+ [ $? -eq 0 ] && return 0
+
+ echo >&2 "Adding ${groupname} user group ..."
+
+ # Linux
+ if check_cmd groupadd
+ then
+ run groupadd -r "${groupname}" && return 0
+ fi
+
+ # FreeBSD
+ if check_cmd pw
+ then
+ run pw groupadd "${groupname}" && return 0
+ fi
+
+ # BusyBox
+ if check_cmd addgroup
+ then
+ run addgroup "${groupname}" && return 0
+ fi
+
+ echo >&2 "Failed to add ${groupname} user group !"
+ return 1
+}
+
+portable_add_user_to_group() {
+ local groupname="${1}" username="${2}"
+
+ getent group "${groupname}" > /dev/null 2>&1
+ [ $? -ne 0 ] && return 1
+
+ # find the user is already in the group
+ local users=$(getent group "${groupname}" | cut -d ':' -f 4)
+ if [[ ",${users}," =~ ,${username}, ]]
+ then
+ # username is already there
+ return 0
+ else
+ # username is not in group
+ echo >&2 "Adding ${username} user to the ${groupname} group ..."
+
+ # Linux
+ if check_cmd usermod