tools/pw-update.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2020 The DragonFly Project.
   4 # All rights reserved.
   5 #
   6 # Redistribution and use in source and binary forms, with or without
   7 # modification, are permitted provided that the following conditions
   8 # are met:
   9 #
  10 # 1. Redistributions of source code must retain the above copyright
  11 #    notice, this list of conditions and the following disclaimer.
  12 # 2. Redistributions in binary form must reproduce the above copyright
  13 #    notice, this list of conditions and the following disclaimer in
  14 #    the documentation and/or other materials provided with the
  15 #    distribution.
  16 # 3. Neither the name of The DragonFly Project nor the names of its
  17 #    contributors may be used to endorse or promote products derived
  18 #    from this software without specific, prior written permission.
  19 #
  20 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21 # ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  23 # FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  24 # COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  25 # INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  26 # BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  27 # LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  28 # AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  29 # OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  30 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31 # SUCH DAMAGE.
  32 #
  33
  34 # Exit if any untested command fails in non-interactive mode
  35 set -e
  36 # Exit when an undefined variable is referenced
  37 set -u
  38
  39 # Usage: add_users <etcdir> <master.passwd> <group>
  40 #
  41 # Add new users and groups in <etcdir> according to the given <master.passwd>
  42 # and <group> files.
  43 #
  44 # NOTE: Existing users and groups are not modified.
  45 #
  46 add_users() {
  47         local etcdir="$1"
  48         local fpasswd="$2"
  49         local fgroup="$3"
  50         local _name _pw _uid _gid _gids _group item
  51         local _class _change _expire _gecos _home _shell _members
  52
  53         echo "===> Adding new users ..."
  54         _gids=""
  55         while IFS=':' read -r _name _pw _uid _gid _class \
  56                         _change _expire _gecos _home _shell; do
  57                 case ${_name} in
  58                 '' | \#*) continue ;;
  59                 esac
  60                 if pw -V ${etcdir} usershow ${_name} -q >/dev/null; then
  61                         continue
  62                 fi
  63                 echo "   * ${_name}: ${_uid}, ${_gid}, ${_gecos}, ${_home}, ${_shell}"
  64
  65                 _group=${_gid}
  66                 if ! pw -V ${etcdir} groupshow ${_gid} -q >/dev/null; then
  67                         # Primary group doesn't exist yet, so first assign to
  68                         # the 'nogroup' group, and then adjust it after
  69                         # creating the group.
  70                         _group="nogroup"
  71                         _gids="${_gids} ${_name}:${_gid}"
  72                 fi
  73
  74                 # NOTE: The shell field can be empty (e.g., user 'toor') and
  75                 #       would default to '/bin/sh'.
  76                 # NOTE: Use '-o' option to allow to create user of duplicate
  77                 #       UID, which is required by the 'toor' user (same UID
  78                 #       as 'root').
  79                 pw -V ${etcdir} useradd ${_name} \
  80                         -o \
  81                         -u ${_uid} \
  82                         -g ${_group} \
  83                         -d "${_home}" \
  84                         -s "${_shell}" \
  85                         -L "${_class}" \
  86                         -c "${_gecos}"
  87         done < ${fpasswd}
  88
  89         echo "===> Adding new groups ..."
  90         while IFS=':' read -r _name _pw _gid _members; do
  91                 case ${_name} in
  92                 '' | \#*) continue ;;
  93                 esac
  94                 if pw -V ${etcdir} groupshow ${_name} -q >/dev/null; then
  95                         continue
  96                 fi
  97                 echo "   * ${_name}: ${_gid}, ${_members}"
  98                 pw -V ${etcdir} groupadd ${_name} -g ${_gid} -M "${_members}"
  99         done < ${fgroup}
 100
 101         echo "===> Adjusting the group of new users ..."
 102         for item in ${_gids}; do
 103                 _name=${item%:*}
 104                 _gid=${item#*:}
 105                 echo "   * ${_name}: ${_gid}"
 106                 pw -V ${etcdir} usermod ${_name} -g ${_gid}
 107         done
 108 }
 109
 110 # Usage: update_user <user> <etcdir> <master.passwd>
 111 #
 112 # Update an existing user in <etcdir> according to the given <master.passwd>.
 113 #
 114 update_user() {
 115         local user="$1"
 116         local etcdir="$2"
 117         local fpasswd="$3"
 118         local _line
 119         local _name _pw _uid _gid _class _change _expire _gecos _home _shell
 120
 121         _line=$(grep "^${user}:" ${fpasswd}) || true
 122         if [ -z "${_line}" ]; then
 123                 echo "ERROR: no such user '${user}'" >&2
 124                 exit 1
 125         fi
 126
 127         echo "${_line}" | {
 128                 IFS=':' read -r _name _pw _uid _gid _class \
 129                         _change _expire _gecos _home _shell
 130                 echo "===> Updating user ${user} ..."
 131                 echo "   * ${_name}: ${_uid}, ${_gid}, ${_gecos}, ${_home}, ${_shell}"
 132                 pw -V ${etcdir} usermod ${user} \
 133                         -u ${_uid} \
 134                         -g ${_gid} \
 135                         -d ${_home} \
 136                         -s ${_shell} \
 137                         -L "${_class}" \
 138                         -c "${_gecos}"
 139         }
 140 }
 141
 142 # Usage: update_group <group> <etcdir> <group>
 143 #
 144 # Update an existing group in <etcdir> according to the given <group> file.
 145 #
 146 update_group() {
 147         local group="$1"
 148         local etcdir="$2"
 149         local fgroup="$3"
 150         local _line
 151         local _name _pw _gid _members
 152
 153         _line=$(grep "^${group}:" ${fgroup}) || true
 154         if [ -z "${_line}" ]; then
 155                 echo "ERROR: no such group '${group}'" >&2
 156                 exit 1
 157         fi
 158
 159         echo "${_line}" | {
 160                 IFS=':' read -r _name _pw _gid _members
 161                 echo "===> Updating group ${group} ..."
 162                 echo "   * ${_name}: ${_gid}, ${_members}"
 163                 pw -V ${etcdir} groupmod ${group} -g ${_gid} -M "${_members}"
 164         }
 165 }
 166
 167 usage() {
 168         cat > /dev/stderr << _EOF_
 169 Add/update users and groups.
 170
 171 Usage: ${0##*/} -d <etc-dir> -g <group-file> -p <master.passwd-file>
 172         [-G group] [-U user]
 173
 174 _EOF_
 175
 176         exit 1
 177 }
 178
 179 ETC_DIR=
 180 GROUP_FILE=
 181 PASSWD_FILE=
 182 UPDATE_GROUP=
 183 UPDATE_USER=
 184
 185 while getopts :d:G:g:hp:U: opt; do
 186         case ${opt} in
 187         d)
 188                 ETC_DIR=${OPTARG}
 189                 ;;
 190         G)
 191                 UPDATE_GROUP=${OPTARG}
 192                 ;;
 193         g)
 194                 GROUP_FILE=${OPTARG}
 195                 ;;
 196         p)
 197                 PASSWD_FILE=${OPTARG}
 198                 ;;
 199         U)
 200                 UPDATE_USER=${OPTARG}
 201                 ;;
 202         h | \? | :)
 203                 usage
 204                 ;;
 205         esac
 206 done
 207
 208 shift $((OPTIND - 1))
 209 [ $# -eq 0 ] || usage
 210 [ -n "${ETC_DIR}" ] || usage
 211 [ -n "${GROUP_FILE}" ] || usage
 212 [ -n "${PASSWD_FILE}" ] || usage
 213
 214 if [ -z "${UPDATE_GROUP}" ] && [ -z "${UPDATE_USER}" ]; then
 215         add_users "${ETC_DIR}" "${PASSWD_FILE}" "${GROUP_FILE}"
 216 else
 217         if [ -n "${UPDATE_GROUP}" ]; then
 218                 update_group "${UPDATE_GROUP}" "${ETC_DIR}" "${GROUP_FILE}"
 219         fi
 220         if [ -n "${UPDATE_USER}" ]; then
 221                 update_user "${UPDATE_USER}" "${ETC_DIR}" "${PASSWD_FILE}"
 222         fi
 223 fi