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+#!/bin/bash
+#
+# Copyright 1995 Hrvoje Dogan, Croatia.
+# Copyright 2002-2004, 2008, 2009, 2010 Stuart Winter, Surrey, England, UK.
+# Copyright 2004, 2008-2010 Slackware Linux, Inc., Concord, CA, USA
+# Copyright 2012 Patrick J. Volkerding, Sebeka, MN, USA
+# All rights reserved.
+#
+# Redistribution and use of this script, with or without modification, is
+# permitted provided that the following conditions are met:
+#
+# 1. Redistributions of this script must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+# WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+# EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+#
+##########################################################################
+# Program: /usr/sbin/adduser
+# Purpose: Interactive front end to /usr/sbin/useradd for Slackware Linux
+# Author : Stuart Winter <mozes@slackware.com>
+# Based on the original Slackware adduser by Hrvoje Dogan
+# with modifications by Patrick Volkerding
+# Version: 1.15
+##########################################################################
+# Usage..: adduser [<new_user_name>]
+##########################################################################
+# History #
+###########
+# v1.15 - 2012-09-13
+# * Added scanner group, which may be required by third party drivers.
+# v1.14 - 2012-08-24
+# * Added lp group, which is now required for scanning. <pjv>
+# v1.13 - 13/01/10
+# * Fixed bug that removed underscore characters from UNIX group names.
+# Thanks to mRgOBLIN for the report and Jim Hawkins for the fix. <sw>
+# v1.12 - 21/07/09
+# * Adjusted the search of /etc/passwd to exclude the NIS inclusion
+# string. Thanks to Dominik L. Borkowski.
+# v1.11 - 04/06/09
+# * Add power and netdev to the suggested group list
+# v1.10 - 24/03/08
+# * To facilitate use of the automatic mounting features of HAL,
+# allow the admin to easily add users to the default groups:
+# audio,cdrom,video,plugdev,floppy.
+# The default is not to add new users to these groups.
+# And by the way, this script is "useradd from Slackware" not
+# "superadduser from Gentoo" ;-)
+# v1.09 - 07/06/04
+# * Added standard Slackware script licence to the head of this file.
+# v1.08 - 25/04/04
+# * Disallow user names that begin with a numeric because useradd
+# (from shadow v4.03) does not allow them. <sw>
+# v1.07 - 07/03/03
+# * When supplying a null string for the uid (meaning 'Choose next available'),
+# if there were file names in the range 'a-z' in the pwd then the
+# egrep command considered these files rather than the null string.
+# The egrep expression is now in quotes.
+# Reported & fixed by Vadim O. Ustiansky <sw>
+# v1.06 - 31/03/03
+# * Ask to chown user.group the home directory if it already exists.
+# This helps reduce later confusion when adding users whose home dir
+# already exists (mounted partition for example) and is owned
+# by a user other than the user to which the directory is being
+# assigned as home. Default is not to chown.
+# Brought to my attention by mRgOBLIN. <sw>
+# v1.05 - 04/01/03
+# * Advise & prevent users from creating logins with '.' characters
+# in the user name. <sw>
+# * Made pending account creation info look neater <sw>
+# v1.04 - 09/06/02
+# * Catered for shadow-4.0.3's 'useradd' binary that no longer
+# will let you create a user that has any uppercase chars in it
+# This was reported on the userlocal.org forums
+# by 'xcp' - thanks. <sw,pjv>
+# v1.03 - 20/05/02
+# * Support 'broken' (null lines in) /etc/passwd and
+# /etc/group files <sw>
+# * For recycling UIDs (default still 'off'), we now look in
+# /etc/login.defs for the UID_MIN value and use it
+# If not found then default to 1000 <sw>
+# v1.02 - 10/04/02
+# * Fix user-specified UID bug. <pjv>
+# v1.01 - 23/03/02
+# * Match Slackware indenting style, simplify. <pjv>
+# v1.00 - 22/03/02
+# * Created
+#######################################################################
+
+# Path to files
+pfile=/etc/passwd
+gfile=/etc/group
+sfile=/etc/shells
+
+# Paths to binaries
+useradd=/usr/sbin/useradd
+chfn=/usr/bin/chfn
+passwd=/usr/bin/passwd
+chmod=/bin/chmod
+
+# Defaults
+defhome=/home
+defshell=/bin/bash
+defchmod=711 # home dir permissions - may be preferable to use 701, however.
+defgroup=users
+AGID="audio cdrom floppy plugdev video power netdev lp scanner" # additional groups for desktop users
+
+# Determine what the minimum UID is (for UID recycling)
+# (we ignore it if it's not at the beginning of the line (i.e. commented out with #))
+export recycleUIDMIN="$(grep ^UID_MIN /etc/login.defs | awk '{print $2}' 2>/dev/null)"
+# If we couldn't find it, set it to the default of 1000
+if [ -z "$recycleUIDMIN" ]; then
+ export recycleUIDMIN=1000 # this is the default from Slackware's /etc/login.defs
+fi
+
+
+# This setting enables the 'recycling' of older unused UIDs.
+# When you userdel a user, it removes it from passwd and shadow but it will
+# never get used again unless you specify it expliticly -- useradd (appears to) just
+# look at the last line in passwd and increment the uid. I like the idea of
+# recycling uids but you may have very good reasons not to (old forgotten
+# confidential files still on the system could then be owned by this new user).
+# We'll set this to no because this is what the original adduser shell script
+# did and it's what users expect.
+recycleuids=no
+
+# Function to read keyboard input.
+# bash1 is broken (even ash will take read -ep!), so we work around
+# it (even though bash1 is no longer supported on Slackware).
+function get_input() {
+ local output
+ if [ "`echo $BASH_VERSION | cut -b1`" = "1" ]; then
+ echo -n "${1} " >&2 # fudge for use with bash v1
+ read output
+ else # this should work with any other /bin/sh
+ read -ep "${1} " output
+ fi
+ echo $output
+}
+
+# Function to display the account info
+function display () {
+ local goose
+ goose="$(echo $2 | cut -d ' ' -f 2-)" # lop off the prefixed argument useradd needs
+ echo -n "$1 "
+ # If it's null then display the 'other' information
+ if [ -z "$goose" -a ! -z "$3" ]; then
+ echo "$3"
+ else
+ echo "$goose"
+ fi
+}
+
+# Function to check whether groups exist in the /etc/group file
+function check_group () {
+ local got_error group
+ if [ ! -z "$@" ]; then
+ for group in $@ ; do
+ local uid_not_named="" uid_not_num=""
+ grep -v "$^" $gfile | awk -F: '{print $1}' | grep "^${group}$" >/dev/null 2>&1 || uid_not_named=yes
+ grep -v "$^" $gfile | awk -F: '{print $3}' | grep "^${group}$" >/dev/null 2>&1 || uid_not_num=yes
+ if [ ! -z "$uid_not_named" -a ! -z "$uid_not_num" ]; then
+ echo "- Group '$group' does not exist"
+ got_error=yes
+ fi
+ done
+ fi
+ # Return exit code of 1 if at least one of the groups didn't exist
+ if [ ! -z "$got_error" ]; then
+ return 1
+ fi
+}
+
+#: Read the login name for the new user :#
+#
+# Remember that most Mail Transfer Agents are case independant, so having
+# 'uSer' and 'user' may cause confusion/things to break. Because of this,
+# useradd from shadow-4.0.3 no longer accepts usernames containing uppercase,
+# and we must reject them, too.
+
+# Set the login variable to the command line param
+echo
+LOGIN="$1"
+needinput=yes
+while [ ! -z $needinput ]; do
+ if [ -z "$LOGIN" ]; then
+ while [ -z "$LOGIN" ]; do LOGIN="$(get_input "Login name for new user []:")" ; done
+ fi
+ grep "^${LOGIN}:" $pfile >/dev/null 2>&1 # ensure it's not already used
+ if [ $? -eq 0 ]; then
+ echo "- User '$LOGIN' already exists; please choose another"
+ unset LOGIN
+ elif [ ! -z "$( echo $LOGIN | grep "^[0-9]" )" ]; then
+ echo "- User names cannot begin with a number; please choose another"
+ unset LOGIN
+ elif [ ! "$LOGIN" = "`echo $LOGIN | tr A-Z a-z`" ]; then # useradd does not allow uppercase
+ echo "- User '$LOGIN' contains illegal characters (uppercase); please choose another"
+ unset LOGIN
+ elif [ ! -z "$( echo $LOGIN | grep '\.' )" ]; then
+ echo "- User '$LOGIN' contains illegal characters (period/dot); please choose another"
+ unset LOGIN
+ else
+ unset needinput
+ fi
+done
+
+# Display the user name passed from the shell if it hasn't changed
+if [ "$1" = "$LOGIN" ]; then
+ echo "Login name for new user: $LOGIN"
+fi
+
+#: Get the UID for the user & ensure it's not already in use :#
+#
+# Whilst we _can_ allow users with identical UIDs, it's not a 'good thing' because
+# when you change password for the uid, it finds the first match in /etc/passwd
+# which isn't necessarily the correct user
+#
+echo
+needinput=yes
+while [ ! -z "$needinput" ]; do
+ _UID="$(get_input "User ID ('UID') [ defaults to next available ]:")"
+ egrep -v "^$|^\+" $pfile | awk -F: '{print $3}' | grep "^${_UID}$" >/dev/null 2>&1
+ if [ $? -eq 0 ]; then
+ echo "- That UID is already in use; please choose another"
+ elif [ ! -z "$(echo $_UID | egrep '[A-Za-z]')" ]; then
+ echo "- UIDs are numerics only"
+ else
+ unset needinput
+ fi
+done
+# If we were given a UID, then syntax up the variable to pass to useradd
+if [ ! -z "$_UID" ]; then
+ U_ID="-u ${_UID}"
+else
+ # Will we be recycling UIDs?
+ if [ "$recycleuids" = "yes" ]; then
+ U_ID="-u $(awk -F: '{uid[$3]=1} END { for (i=ENVIRON["recycleUIDMIN"];i in uid;i++);print i}' $pfile)"
+ fi
+fi
+
+#: Get the initial group for the user & ensure it exists :#
+#
+# We check /etc/group for both the text version and the group ID number
+echo
+needinput=yes
+while [ ! -z "$needinput" ]; do
+ GID="$(get_input "Initial group [ ${defgroup} ]:")"
+ check_group "$GID"
+ if [ $? -gt 0 ]; then
+ echo "- Please choose another"
+ else
+ unset needinput
+ fi
+done
+# Syntax the variable ready for useradd
+if [ -z "$GID" ]; then
+ GID="-g ${defgroup}"
+else
+ GID="-g ${GID}"
+fi
+
+#: Get additional groups for the user :#
+#
+echo "Additional UNIX groups:"
+echo
+echo "Users can belong to additional UNIX groups on the system."
+echo "For local users using graphical desktop login managers such"
+echo "as XDM/KDM, users may need to be members of additional groups"
+echo "to access the full functionality of removable media devices."
+echo
+echo "* Security implications *"
+echo "Please be aware that by adding users to additional groups may"
+echo "potentially give access to the removable media of other users."
+echo
+echo "If you are creating a new user for remote shell access only,"
+echo "users do not need to belong to any additional groups as standard,"
+echo "so you may press ENTER at the next prompt."
+echo
+needinput=yes
+while [ ! -z "$needinput" ]; do
+ history -c
+ history -s "$AGID"
+ echo "Press ENTER to continue without adding any additional groups"
+ echo "Or press the UP arrow key to add/select/edit additional groups"
+ AGID="$(get_input ": " | sed 's/[^A-Za-z0-9 _]//g;s/ */ /g;s/^ $//g' )"
+ if [ ! -z "$AGID" ]; then
+ check_group "$AGID" # check all groups at once (treated as N # of params)
+ if [ $? -gt 0 ]; then
+ echo "- Please re-enter the group(s)"
+ echo
+ else
+ unset needinput # we found all groups specified
+ AGID="-G $(echo $AGID | tr ' ' ,)" # useradd takes comma delimited groups
+ fi
+ else
+ unset needinput # we don't *have* to have additional groups
+ fi
+done
+
+#: Get the new user's home dir :#
+#
+echo
+needinput=yes
+while [ ! -z "$needinput" ]; do
+ HME="$(get_input "Home directory [ ${defhome}/${LOGIN} ]")"
+ if [ -z "$HME" ]; then
+ HME="${defhome}/${LOGIN}"
+ fi
+ # Warn the user if the home dir already exists
+ if [ -d "$HME" ]; then
+ echo "- Warning: '$HME' already exists !"
+ getyn="$(get_input " Do you wish to change the home directory path ? (Y/n) ")"
+ if [ "$(echo $getyn | grep -i "n")" ]; then
+ unset needinput
+ # You're most likely going to only do this if you have the dir *mounted* for this user's $HOME
+ getyn="$(get_input " Do you want to chown $LOGIN.$( echo $GID | awk '{print $2}') $HME ? (y/N) ")"
+ if [ "$(echo $getyn | grep -i "y")" ]; then
+ CHOWNHOMEDIR=$HME # set this to the home directory
+ fi
+ fi
+ else
+ unset needinput
+ fi
+done
+HME="-d ${HME}"
+
+#: Get the new user's shell :#
+echo
+needinput=yes
+while [ ! -z "$needinput" ]; do
+ unset got_error
+ SHL="$(get_input "Shell [ ${defshell} ]")"
+ if [ -z "$SHL" ]; then
+ SHL="${defshell}"
+ fi
+ # Warn the user if the shell doesn't exist in /etc/shells or as a file
+ if [ -z "$(grep "^${SHL}$" $sfile)" ]; then
+ echo "- Warning: ${SHL} is not in ${sfile} (potential problem using FTP)"
+ got_error=yes
+ fi
+ if [ ! -f "$SHL" ]; then
+ echo "- Warning: ${SHL} does not exist as a file"
+ got_error=yes
+ fi
+ if [ ! -z "$got_error" ]; then
+ getyn="$(get_input " Do you wish to change the shell ? (Y/n) ")"
+ if [ "$(echo $getyn | grep -i "n")" ]; then
+ unset needinput
+ fi
+ else
+ unset needinput
+ fi
+done
+SHL="-s ${SHL}"
+
+#: Get the expiry date :#
+echo
+needinput=yes
+while [ ! -z "$needinput" ]; do
+ EXP="$(get_input "Expiry date (YYYY-MM-DD) []:")"
+ if [ ! -z "$EXP" ]; then
+ # Check to see whether the expiry date is in the valid format
+ if [ -z "$(echo "$EXP" | grep "^[[:digit:]]\{4\}[-]\?[[:digit:]]\{2\}[-]\?[[:digit:]]\{2\}$")" ]; then
+ echo "- That is not a valid expiration date"
+ else
+ unset needinput
+ EXP="-e ${EXP}"
+ fi
+ else
+ unset needinput
+ fi
+done
+
+# Display the info about the new impending account
+echo
+echo "New account will be created as follows:"
+echo
+echo "---------------------------------------"
+display "Login name.......: " "$LOGIN"
+display "UID..............: " "$_UID" "[ Next available ]"
+display "Initial group....: " "$GID"
+display "Additional groups: " "$AGID" "[ None ]"
+display "Home directory...: " "$HME"
+display "Shell............: " "$SHL"
+display "Expiry date......: " "$EXP" "[ Never ]"
+echo
+
+echo "This is it... if you want to bail out, hit Control-C. Otherwise, press"
+echo "ENTER to go ahead and make the account."
+read junk
+
+echo
+echo "Creating new account..."
+echo
+echo
+
+# Add the account to the system
+CMD="$useradd "$HME" -m "$EXP" "$U_ID" "$GID" "$AGID" "$SHL" "$LOGIN""
+$CMD
+
+if [ $? -gt 0 ]; then
+ echo "- Error running useradd command -- account not created!"
+ echo "(cmd: $CMD)"
+ exit 1
+fi
+
+# chown the home dir ? We can only do this once the useradd has
+# completed otherwise the user name doesn't exist.
+if [ ! -z "${CHOWNHOMEDIR}" ]; then
+ chown "$LOGIN"."$( echo $GID | awk '{print $2}')" "${CHOWNHOMEDIR}"
+fi
+
+# Set the finger information
+$chfn "$LOGIN"
+if [ $? -gt 0 ]; then
+ echo "- Warning: an error occurred while setting finger information"
+fi
+
+# Set a password
+$passwd "$LOGIN"
+if [ $? -gt 0 ]; then
+ echo "* WARNING: An error occured while setting the password for"
+ echo " this account. Please manually investigate this *"
+ exit 1
+fi
+
+# If it was created (it should have been!), set the permissions for that user's dir
+HME="$(echo "$HME" | awk '{print $2}')" # We have to remove the -g prefix
+if [ -d "$HME" ]; then
+ $chmod $defchmod "$HME"
+fi
+
+echo
+echo
+echo "Account setup complete."
+exit 0