#!/bin/sh
#
# @(#)add_user 1.1 94/10/31 SMI
#
# add user script for use with sys-config
# arguments: uname uid gid fullname homedir shell
#

# dirname is in SystemV catagory - so put it herein
shdirname()
{
expr \
  ${1-.}'/' : '\(/\)[^/]*//*$' \
  \| ${1-.}'/' : '\(.*[^/]\)//*[^/][^/]*//*$' \
  \| .
}

myname=`basename $0`
Passwd=/etc/passwd
PATH=$PATH:/usr/ucb
export PATH
# check for root
if [ "`whoami`x" != "root"x ]; then
   echo "You must be root to do $myname!"
   exit 1
fi

# check for number of args
if [ $# -ne 6 ]; then
	echo "${myname}: invalid number of arguments"
	echo "   usage: ${myname} uname uid gid \"fullname\" homedir shell"
	exit 1
fi

# put args into named variables
uname=$1
uid=$2
gid=$3
fullname=$4
homedir=$5
shell=$6

# checks for validity of arguments
# check uid
if test $uid -lt 10 ; then
	echo  "uid: uid must be greater than 10 and less than 60000"
	exit 1
elif test $uid -gt 60000 ; then 
	echo  "uid: uid must be greater than 10 and less than 60000"
	exit 1
fi

# check gid
if test $gid -lt 10 ; then
	echo  "gid: gid must be greater than 10 and less than 60000"
	exit 1
elif test $gid -gt 60000 ; then 
	echo  "gid: gid must be greater than 10 and less than 60000"
	exit 1
fi


# check shell
if test ! -x $shell ; then
	echo "$shell: the program does not exist or is not executable"
	exit 1
fi

# check homedir
# check if homedir already exists
if [ -f ${homedir} ]; then
	echo "${myname}: WARNING: a file named \"${homedir}\" already exists"
	echo "and is NOT a directory, NOT setting up user account"
	exit 1
fi
if [ -d ${homedir} ]; then
	echo "${myname}: WARNING: home directory \"${homedir}\" already exists"
	echo "    no files copied, NOT setting up user account"
	exit 1
fi
# check if all but last path of homedir exits
dir=`shdirname $homedir`
if test ! -d $dir ; then
	echo "$dir: does not exist or is not a directory"
	exit 1
fi
# check if $homedir is local
dfout=`df $dir | ( read aline; read aline; echo $aline )`
case $dfout in
  /dev*) ;; # $dir is on local machine
      *) echo "$dir: is not on local machine"
         exit 1;;
esac

# create a null /etc/passwd entry
# first check if one already exists
if grep -s "^${uname}:" ${Passwd} ; then
	echo "${myname}: ERROR: ${uname} aleady in ${Passwd}";
	exit 1;
fi
# check if uid already exists
if grep -s ".*:.*:${uid}:" ${Passwd} ; then
	echo "uid: ERROR: ${uid} already in ${Passwd}";
	exit 1;
fi
pwent="${uname}::${uid}:${gid}:${fullname}:${homedir}:${shell}"
# XXX sould we use tmp file and rename it?
( echo '$' ;
  echo 'i' ;
  echo "${pwent}" ;
  echo '.' ;
  echo 'w' ;
  echo 'q' ) | ed -s ${Passwd} > /dev/null
if grep -s "^${uname}:" ${Passwd} ; then
	:
else
	echo "${myname}: ERROR: password entry didn't go to ${Passwd}";
	exit 1;
fi

# make the home directory
/bin/mkdir ${homedir}
/usr/etc/chown ${uname} ${homedir}
/bin/chgrp ${gid} ${homedir}

# add default user startup files
cp /usr/lib/Cshrc ${homedir}/.cshrc
cp /usr/lib/Login ${homedir}/.login
cp /usr/lib/.sunview ${homedir}/.sunview
cp /usr/lib/.rootmenu ${homedir}/.rootmenu
/usr/etc/chown -R ${uname} ${homedir}
/bin/chgrp -R ${gid} ${homedir}

# is ok, exit 0
exit 0