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adduser
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1997-11-13
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#! /bin/sh
#
# adduser 1.0: a utility to add users to the system
#
# Copyright (C) 1994 Ian A. Murdock <imurdock@shell.portal.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
# Written for the Debian Linux distribution (01/21/94). Feel free to use
# it in YOUR distribution, too. :) Please note that this is just a simple
# script that _somewhat_ automates the really boring and repetitive task
# of creating new user accounts. It makes no attempt to be sophisticated.
# Let me know if you improve it in any way.
#
# I need to write a man page for this.
#
# Modified by Marc Ewing <marc@redhat.com> for RHS Linux
# Everything happens too fast, so don't let the user interrupt.
trap "" 1 2 3 15
# Set a few important variables before getting started.
NUMARG=$#
LOGIN="$1"
EXIST=0
NOHOME="$2"
PASSWD="/etc/passwd"
PBAK="/etc/passwd-" # Some programs use /etc/passwd-, others use
# /etc/passwd.OLD. Take your pick.
GROUP="/etc/group"
GBAK="/etc/group-"
PLOCK="/etc/ptmp" # Standard method of locking the password file.
DSHELL="/bin/bash"
DHOME="/home"
SKEL="/etc/skel"
SPOOL="/var/spool/mail"
FIRST_UID=500
FIRST_GID=500
# A few sanity checks...
if [ `id -u` != 0 ]; then
echo "Only root may add users to the system." ; exit 1
fi
if [ $NUMARG = 0 ]; then
echo "You need to specify the login to add; for example, \`adduser" \
"imurdock'." ; exit 1
fi
id $LOGIN >/dev/null 2>/dev/null && EXIST=1
if [ $EXIST = 1 ]; then
echo "The login $LOGIN already exists."
exit 1
fi
if [ -f $PLOCK ]; then
echo "$PASSWD is locked. Try again later." ; exit 1
fi
# And now the program begins:
echo "" ; echo -n "Looking for first available UID..."
NUID=`cut -f 3 -d ":" $PASSWD | sort -n | awk -v uid=$FIRST_UID '
{ if ($1 == uid) uid = uid + 1; }
END { print uid; }
'`
if [ $NUID -ge 65536 ]; then
echo "Sorry, ran out of uids."
exit 1
fi
echo " $NUID"
echo -n "Looking for first available GID..."
NGID=`cut -f 3 -d ":" $GROUP | sort -n | awk -v gid=$FIRST_GID '
{ if ($1 == gid) gid = gid + 1; }
END { print gid; }
'`
if [ $NGID -lt $FIRST_GID ]; then
NGID=$FIRST_GID
fi
echo " $NGID"
echo "" ; echo -n "Adding login: $LOGIN..."
touch $PLOCK ;
cp $PASSWD $PBAK
echo "$LOGIN:*:$NUID:$NGID:RHS Linux User:$DHOME/$LOGIN:$DSHELL" >> $PASSWD
# Add user to users group
cp $GROUP $GBAK
sed "s/^\(users.*[^:]\)\$/\1,$LOGIN/" < $GBAK |
sed "s/^\(users.*:\)\$/\1$LOGIN/" > $GROUP
#sed "s/^\(users.*[^:]\)$/\1,$LOGIN/" < $GBAK |
#sed "s/^\(users.*:\)$/\1,$LOGIN/" > $GROUP
echo "$LOGIN::$NGID:$LOGIN" >> $GROUP
rm -f $PLOCK
echo "done."
if [ "x$NOHOME" = "x" ]; then
echo -n "Creating home directory: $DHOME/$LOGIN..."
mkdir $DHOME/$LOGIN
chmod 2775 $DHOME/$LOGIN
cp -a $SKEL/.??* $SKEL/* $DHOME/$LOGIN >/dev/null 2>/dev/null
chown -R $NUID.$NGID $DHOME/$LOGIN
echo "done."
fi
echo -n "Creating mailbox: $SPOOL/$LOGIN..."
touch $SPOOL/$LOGIN ; chmod 660 $SPOOL/$LOGIN ; chown $NUID.mail $SPOOL/$LOGIN
echo "done."
echo ""
echo "Don't forget to set the password."
if [ "x$NOHOME" != "x" ]; then
echo ""
echo "The home directory for $LOGIN was set to $DHOME/$LOGIN but the directory"
echo "was not created. Be sure that you set it up properly."
fi
#passwd $LOGIN
#chfn $LOGIN
# EOF