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408 lines
14 KiB
408 lines
14 KiB
#!/bin/bash
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#
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# Copyright 1995 Hrvoje Dogan, Croatia.
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# Copyright 2002, 2003, 2004 Stuart Winter, West Midlands, England, UK.
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# Copyright 2004 Slackware Linux, Inc., Concord, CA, USA
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# All rights reserved.
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#
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# Redistribution and use of this script, with or without modification, is
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# permitted provided that the following conditions are met:
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#
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# 1. Redistributions of this script must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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# WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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# EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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#
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##########################################################################
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# Program: /usr/sbin/adduser
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# Purpose: Interactive front end to /usr/sbin/useradd for Slackware Linux
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# Author : Stuart Winter <stuart@polplex.co.uk>
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# Based on the original Slackware adduser by Hrvoje Dogan
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# with modifications by Patrick Volkerding
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# Version: 1.09
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##########################################################################
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# Usage..: adduser [<new_user_name>]
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##########################################################################
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# History #
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###########
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# v1.09 - 07/06/04
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# * Added standard Slackware script licence to the head of this file.
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# v1.08 - 25/04/04
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# * Disallow user names that begin with a numeric because useradd
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# (from shadow v4.03) does not allow them. <sw>
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# v1.07 - 07/03/03
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# * When supplying a null string for the uid (meaning 'Choose next available'),
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# if there were file names in the range 'a-z' in the pwd then the
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# egrep command considered these files rather than the null string.
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# The egrep expression is now in quotes.
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# Reported & fixed by Vadim O. Ustiansky <sw>
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# v1.06 - 31/03/03
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# * Ask to chown user.group the home directory if it already exists.
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# This helps reduce later confusion when adding users whose home dir
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# already exists (mounted partition for example) and is owned
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# by a user other than the user to which the directory is being
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# assigned as home. Default is not to chown.
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# Brought to my attention by mRgOBLIN. <sw>
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# v1.05 - 04/01/03
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# * Advise & prevent users from creating logins with '.' characters
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# in the user name. <sw>
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# * Made pending account creation info look neater <sw>
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# v1.04 - 09/06/02
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# * Catered for shadow-4.0.3's 'useradd' binary that no longer
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# will let you create a user that has any uppercase chars in it
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# This was reported on the userlocal.org forums
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# by 'xcp' - thanks. <sw,pjv>
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# v1.03 - 20/05/02
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# * Support 'broken' (null lines in) /etc/passwd and
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# /etc/group files <sw>
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# * For recycling UIDs (default still 'off'), we now look in
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# /etc/login.defs for the UID_MIN value and use it
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# If not found then default to 1000 <sw>
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# v1.02 - 10/04/02
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# * Fix user-specified UID bug. <pjv>
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# v1.01 - 23/03/02
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# * Match Slackware indenting style, simplify. <pjv>
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# v1.00 - 22/03/02
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# * Created
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#######################################################################
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# Path to files
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pfile=/etc/passwd
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gfile=/etc/group
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sfile=/etc/shells
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# Paths to binaries
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useradd=/usr/sbin/useradd
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chfn=/usr/bin/chfn
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passwd=/usr/bin/passwd
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chmod=/bin/chmod
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# Defaults
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defhome=/home
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defshell=/bin/bash
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defchmod=711 # home dir permissions - may be preferable to use 701, however.
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defgroup=users
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# Determine what the minimum UID is (for UID recycling)
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# (we ignore it if it's not at the beginning of the line (i.e. commented out with #))
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export recycleUIDMIN="$(grep ^UID_MIN /etc/login.defs | awk '{print $2}' 2>/dev/null)"
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# If we couldn't find it, set it to the default of 1000
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if [[ -z "$recycleUIDMIN" ]]; then
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export recycleUIDMIN=1000 # this is the default from Slackware's /etc/login.defs
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fi
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# This setting enables the 'recycling' of older unused UIDs.
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# When you userdel a user, it removes it from passwd and shadow but it will
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# never get used again unless you specify it expliticly -- useradd (appears to) just
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# look at the last line in passwd and increment the uid. I like the idea of
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# recycling uids but you may have very good reasons not to (old forgotten
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# confidential files still on the system could then be owned by this new user).
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# We'll set this to no because this is what the original adduser shell script
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# did and it's what users expect.
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recycleuids=no
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# Function to read keyboard input.
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# bash1 is broken (even ash will take read -ep!), so we work around
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# it (even though bash1 is no longer supported on Slackware).
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function get_input() {
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local output
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if [[ "`echo $BASH_VERSION | cut -b1`" = "1" ]]; then
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echo -n "${1} " >&2 # fudge for use with bash v1
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read output
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else # this should work with any other /bin/sh
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read -ep "${1} " output
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fi
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echo $output
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}
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# Function to display the account info
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function display () {
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local goose
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goose="$(echo $2 | cut -d ' ' -f 2-)" # lop off the prefixed argument useradd needs
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echo -n "$1 "
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# If it's null then display the 'other' information
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if [ -z "$goose" -a ! -z "$3" ]; then
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echo "$3"
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else
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echo "$goose"
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fi
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}
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# Function to check whether groups exist in the /etc/group file
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function check_group () {
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local got_error group
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if [[ ! -z "$@" ]]; then
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for group in $@ ; do
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local uid_not_named="" uid_not_num=""
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grep -v "$^" $gfile | awk -F: '{print $1}' | grep "^${group}$" >/dev/null 2>&1 || uid_not_named=yes
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grep -v "$^" $gfile | awk -F: '{print $3}' | grep "^${group}$" >/dev/null 2>&1 || uid_not_num=yes
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if [ ! -z "$uid_not_named" -a ! -z "$uid_not_num" ]; then
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echo "- Group '$group' does not exist"
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got_error=yes
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fi
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done
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fi
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# Return exit code of 1 if at least one of the groups didn't exist
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if [[ ! -z "$got_error" ]]; then
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return 1
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fi
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}
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#: Read the login name for the new user :#
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#
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# Remember that most Mail Transfer Agents are case independant, so having
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# 'uSer' and 'user' may cause confusion/things to break. Because of this,
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# useradd from shadow-4.0.3 no longer accepts usernames containing uppercase,
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# and we must reject them, too.
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# Set the login variable to the command line param
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echo
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LOGIN="$1"
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needinput=yes
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while [[ ! -z $needinput ]]; do
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if [[ -z "$LOGIN" ]]; then
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while [[ -z "$LOGIN" ]]; do LOGIN="$(get_input "Login name for new user []:")" ; done
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fi
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grep "^${LOGIN}:" $pfile >/dev/null 2>&1 # ensure it's not already used
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if [[ $? -eq 0 ]]; then
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echo "- User '$LOGIN' already exists; please choose another"
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unset LOGIN
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elif [[ ! -z "$( echo $LOGIN | grep "^[0-9]" )" ]]; then
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echo "- User names cannot begin with a number; please choose another"
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unset LOGIN
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elif [[ ! "$LOGIN" = "`echo $LOGIN | tr A-Z a-z`" ]]; then # useradd does not allow uppercase
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echo "- User '$LOGIN' contains illegal characters (uppercase); please choose another"
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unset LOGIN
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elif [[ ! -z "$( echo $LOGIN | grep '\.' )" ]]; then
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echo "- User '$LOGIN' contains illegal characters (period/dot); please choose another"
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unset LOGIN
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else
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unset needinput
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fi
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done
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# Display the user name passed from the shell if it hasn't changed
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if [[ "$1" = "$LOGIN" ]]; then
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echo "Login name for new user: $LOGIN"
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fi
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#: Get the UID for the user & ensure it's not already in use :#
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#
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# Whilst we _can_ allow users with identical UIDs, it's not a 'good thing' because
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# when you change password for the uid, it finds the first match in /etc/passwd
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# which isn't necessarily the correct user
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#
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echo
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needinput=yes
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while [[ ! -z "$needinput" ]]; do
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_UID="$(get_input "User ID ('UID') [ defaults to next available ]:")"
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grep -v "^$" $pfile | awk -F: '{print $3}' | grep "^${_UID}$" >/dev/null 2>&1
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if [[ $? -eq 0 ]]; then
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echo "- That UID is already in use; please choose another"
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elif [ ! -z "$(echo $_UID | egrep '[A-Za-z]')" ]; then
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echo "- UIDs are numerics only"
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else
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unset needinput
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fi
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done
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# If we were given a UID, then syntax up the variable to pass to useradd
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if [[ ! -z "$_UID" ]]; then
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U_ID="-u ${_UID}"
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else
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# Will we be recycling UIDs?
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if [[ "$recycleuids" = "yes" ]]; then
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U_ID="-u $(awk -F: '{uid[$3]=1} END { for (i=ENVIRON["recycleUIDMIN"];i in uid;i++);print i}' $pfile)"
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fi
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fi
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#: Get the initial group for the user & ensure it exists :#
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#
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# We check /etc/group for both the text version and the group ID number
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echo
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needinput=yes
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while [[ ! -z "$needinput" ]]; do
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GID="$(get_input "Initial group [ ${defgroup} ]:")"
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check_group "$GID"
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if [[ $? -gt 0 ]]; then
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echo "- Please choose another"
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else
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unset needinput
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fi
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done
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# Syntax the variable ready for useradd
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if [[ -z "$GID" ]]; then
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GID="-g ${defgroup}"
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else
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GID="-g ${GID}"
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fi
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#: Get additional groups for the user :#
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#
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echo
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needinput=yes
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while [[ ! -z "$needinput" ]]; do
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AGID="$(get_input "Additional groups (comma separated) []:")"
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AGID="$(echo "$AGID" | tr -d ' ' | tr , ' ')" # fix up for parsing
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if [[ ! -z "$AGID" ]]; then
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check_group "$AGID" # check all groups at once (treated as N # of params)
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if [[ $? -gt 0 ]]; then
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echo "- Please re-enter the group(s)"
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else
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unset needinput # we found all groups specified
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AGID="-G $(echo "$AGID" | tr ' ' ,)"
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fi
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else
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unset needinput # we don't *have* to have additional groups
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fi
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done
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#: Get the new user's home dir :#
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#
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echo
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needinput=yes
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while [[ ! -z "$needinput" ]]; do
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HME="$(get_input "Home directory [ ${defhome}/${LOGIN} ]")"
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if [[ -z "$HME" ]]; then
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HME="${defhome}/${LOGIN}"
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fi
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# Warn the user if the home dir already exists
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if [[ -d "$HME" ]]; then
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echo "- Warning: '$HME' already exists !"
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getyn="$(get_input " Do you wish to change the home directory path ? (Y/n) ")"
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if [[ "$(echo $getyn | grep -i "n")" ]]; then
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unset needinput
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# You're most likely going to only do this if you have the dir *mounted* for this user's $HOME
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getyn="$(get_input " Do you want to chown $LOGIN.$( echo $GID | awk '{print $2}') $HME ? (y/N) ")"
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if [[ "$(echo $getyn | grep -i "y")" ]]; then
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CHOWNHOMEDIR=$HME # set this to the home directory
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fi
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fi
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else
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unset needinput
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fi
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done
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HME="-d ${HME}"
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#: Get the new user's shell :#
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echo
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needinput=yes
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while [[ ! -z "$needinput" ]]; do
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unset got_error
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SHL="$(get_input "Shell [ ${defshell} ]")"
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if [[ -z "$SHL" ]]; then
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SHL="${defshell}"
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fi
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# Warn the user if the shell doesn't exist in /etc/shells or as a file
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if [[ -z "$(grep "^${SHL}$" $sfile)" ]]; then
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echo "- Warning: ${SHL} is not in ${sfile} (potential problem using FTP)"
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got_error=yes
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fi
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if [[ ! -f "$SHL" ]]; then
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echo "- Warning: ${SHL} does not exist as a file"
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got_error=yes
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fi
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if [[ ! -z "$got_error" ]]; then
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getyn="$(get_input " Do you wish to change the shell ? (Y/n) ")"
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if [[ "$(echo $getyn | grep -i "n")" ]]; then
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unset needinput
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fi
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else
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unset needinput
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fi
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done
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SHL="-s ${SHL}"
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#: Get the expiry date :#
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echo
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needinput=yes
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while [[ ! -z "$needinput" ]]; do
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EXP="$(get_input "Expiry date (YYYY-MM-DD) []:")"
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if [[ ! -z "$EXP" ]]; then
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# Check to see whether the expiry date is in the valid format
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if [ -z "$(echo "$EXP" | grep "^[[:digit:]]\{4\}[-]\?[[:digit:]]\{2\}[-]\?[[:digit:]]\{2\}$")" ]; then
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echo "- That is not a valid expiration date"
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else
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unset needinput
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EXP="-e ${EXP}"
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fi
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else
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unset needinput
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fi
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done
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# Display the info about the new impending account
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echo
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echo "New account will be created as follows:"
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echo
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echo "---------------------------------------"
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display "Login name.......: " "$LOGIN"
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display "UID..............: " "$_UID" "[ Next available ]"
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display "Initial group....: " "$GID"
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display "Additional groups: " "$AGID" "[ None ]"
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display "Home directory...: " "$HME"
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display "Shell............: " "$SHL"
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display "Expiry date......: " "$EXP" "[ Never ]"
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echo
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echo "This is it... if you want to bail out, hit Control-C. Otherwise, press"
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echo "ENTER to go ahead and make the account."
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read junk
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echo
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echo "Creating new account..."
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echo
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echo
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# Add the account to the system
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CMD="$useradd "$HME" -m "$EXP" "$U_ID" "$GID" "$AGID" "$SHL" "$LOGIN""
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$CMD
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if [[ $? -gt 0 ]]; then
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echo "- Error running useradd command -- account not created!"
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echo "(cmd: $CMD)"
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exit 1
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fi
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# chown the home dir ? We can only do this once the useradd has
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# completed otherwise the user name doesn't exist.
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if [[ ! -z "${CHOWNHOMEDIR}" ]]; then
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chown "$LOGIN"."$( echo $GID | awk '{print $2}')" "${CHOWNHOMEDIR}"
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fi
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# Set the finger information
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$chfn "$LOGIN"
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if [[ $? -gt 0 ]]; then
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echo "- Warning: an error occurred while setting finger information"
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fi
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# Set a password
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$passwd "$LOGIN"
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if [[ $? -gt 0 ]]; then
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echo "* WARNING: An error occured while setting the password for"
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echo " this account. Please manually investigate this *"
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exit 1
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fi
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# If it was created (it should have been!), set the permissions for that user's dir
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HME="$(echo "$HME" | awk '{print $2}')" # We have to remove the -g prefix
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if [[ -d "$HME" ]]; then
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$chmod $defchmod "$HME"
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fi
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echo
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echo
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echo "Account setup complete."
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exit 0
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