#!/bin/sh
# rewrited by Konrad Krzysztof Krasinski 2003
# tested on Slackware 8.0, 8.1 and 9.0
#
# check that the configure options are correct for chrooted operation:

# Removed for the debian package
# if [ xscponlyc = x ] || [ ! -f ./config.h ]; then
# 	echo 
# 	echo 'your scponly build is not configured for chrooted operation.'
# 	echo 'please reconfigure as follows, then rebuild and reinstall:'
# 	echo
# 	echo './configure --enable-chrooted-binary (... other options)'
# 	echo
# 	exit 1
# fi

# the following is a list of binaries that will be staged in the target dir
BINARIES=`/usr/bin/grep '#define PROG_' config.h | /usr/bin/cut -f2 -d\" | /usr/bin/grep -v ^cd$`

# a function to display a failure message and then exit 
fail ( ) {
	echo -e $@
	exit 1
}

# "get with default" function
# this function prompts the user with a query and default reply
# it returns the user reply
getwd ( ) {
	query="$1"
	default="$2"
	echo -en "$query [$default]" | cat >&2
	read response
	if [ x$response = "x" ]; then
		response=$default
	fi
	echo $response
}

# "get yes no" function
# this function prompts the user with a query and will continue to do so
# until they reply with either "y" or "n"
getyn ( ) {
	query="$@"
	echo -en $query | cat >&2
	read response
	while [ x$response != "xy" -a x$response != "xn" ]; do
		echo -e "\n'y' or 'n' only please...\n" | cat >&2
		echo -en $query | cat >&2
		read response
	done	
	echo $response
}

if [ x/usr/bin/ldd = x ]; then
	echo "this script requires the program ldd to determine which"
	fail "shared libraries to copy into your chrooted dir..."
fi
USE_PW=0;
#if [ x/usr/sbin/useradd = x ]; then
	USE_PW=1;
#else 
#    if [ x = x ]; then
#	echo "this script requires the program useradd or pw to add your"
#	fail "chrooted scponly user."
#    fi
#fi

# we need to be root
if [ `id -u` != "0" ]; then
	fail "you must be root to run this script\n"
fi

echo -n "Install for what username? [template_scp]"
read targetuser
if [ "x$targetuser" = "x" ]; then
    targetuser="template_scp"
fi

echo
echo Next we need to set the home directory for this scponly user.
echo please note that the user\'s home directory MUST NOT be writable
echo by the scponly user.  this is important so that the scponly user
echo cannot subvert the .ssh configuration parameters.
echo
targetdir=/home/$targetuser
echo -n "enter the home directory you wish to set for this user: [$targetdir] "
read targetdir2
if [ "x$targetdir2" != "x" ]; then
    targetdir=$targetdir2
fi

echo
echo for this reason, an \"public_html\" subdirectory will be created that
echo the scponly user can write into.
echo if you want the scponly user to 
echo automatically change to this public_html subdirectory upon login, you
echo can specify this when you specify the user\'s home directory as 
echo follows:
echo
echo set the home dir to /chroot_path//public_html [we do this right now]
echo
echo when scponly chroots, it will only chroot to "chroot_path" and
echo afterwards, it will chdir to public_html.
echo

echo ginstalling the dirs and files ...
/usr/bin/ginstall -c -d $targetdir
/usr/bin/ginstall -c -d $targetdir/usr
/usr/bin/ginstall -c -d $targetdir/usr/bin
/usr/bin/ginstall -c -d $targetdir/usr/sbin
/usr/bin/ginstall -c -d $targetdir/usr/local
/usr/bin/ginstall -c -d $targetdir/usr/local/lib
/usr/bin/ginstall -c -d $targetdir/usr/local/bin
/usr/bin/ginstall -c -d $targetdir/lib
/usr/bin/ginstall -c -d $targetdir/usr/lib
/usr/bin/ginstall -c -d $targetdir/usr/libexec
/usr/bin/ginstall -c -d $targetdir/usr/libexec/openssh
/usr/bin/ginstall -c -d $targetdir/bin
/usr/bin/ginstall -c -d $targetdir/etc

for bin in $BINARIES; do
	/usr/bin/ginstall -c $bin $targetdir$bin
done

LIB_LIST=`/usr/bin/ldd $BINARIES 2> /dev/null | /usr/bin/cut -f2 -d\> | /usr/bin/cut -f1 -d\( | /usr/bin/grep "^ " | /usr/bin/sort -u`

LDSOFOUND=0
if [ -f /usr/libexec/ld.so ]; then
	LIB_LIST="$LIB_LIST /usr/libexec/ld.so"
	LDSOFOUND=1
fi
if [ -f /lib/ld-linux.so.2 ]; then 
	LIB_LIST="$LIB_LIST /lib/ld-linux.so.2"
	LDSOFOUND=1
fi
if [ -f /usr/libexec/ld-elf.so.1 ]; then
	LIB_LIST="$LIB_LIST /usr/libexec/ld-elf.so.1"
	LDSOFOUND=1
fi

if [ $LDSOFOUND -eq 0 ]; then
	fail i cant find your equivalent of ld.so
fi

/bin/ls /lib/libnss_compat* 2>&1 > /dev/null
if [ $? -eq 0 ]; then
	LIB_LIST="$LIB_LIST /lib/libnss_compat* /lib/ld.so"
fi

echo "ginstalling some libs - some errors are false allarms ..."

if [ "x$LIB_LIST" != "x" ]; then
	for lib in $LIB_LIST; do
		/usr/bin/ginstall -c $lib $targetdir/$lib
	done
fi
echo targetdir=$targetdir
if [ $USE_PW -eq 0 ] ; then
    /usr/sbin/useradd -d "$targetdir//public_html" -s "/usr/local/sbin/scponlyc" $targetuser    
    if [ $? -ne 0 ]; then
         fail "if this user exists, remove it and try again"
    fi
else
     useradd  -s "/usr/local/sbin/scponlyc" -d "$targetdir//public_html" $targetuser
    if [ $? -ne 0 ]; then
         fail "if this user exists, remove it and try again"
    fi
fi 

chown 0:0 $targetdir 
if [ -d $targetdir/.ssh ]; then
	chown 0.0 $targetdir/.ssh
fi

if [ ! -d $targetdir/public_html ]; then
	echo -e "\ncreating  $targetdir/public_html directory for uploading files"
	/usr/bin/ginstall -c -o $targetuser -d $targetdir/public_html
fi

# the following is VERY BSD centric
# i check for pwd_mkdb before trying to use it
if [ x = x ]; then
	/usr/bin/grep $targetuser /etc/passwd > $targetdir/etc/passwd
else
	/usr/bin/grep $targetuser /etc/master.passwd > $targetdir/etc/master.passwd
	 -d "$targetdir/etc" $targetdir/etc/master.passwd
	/bin/rm -rf $targetdir/etc/master.passwd $targetdir/etc/spwd.db
fi


echo
echo /usr/bin/groups problem solving
rm -f $tagetdir/usr/bin/groups
gcc groups.c -o groups
cp groups $tagetdir/usr/bin/groups


echo /etc/passwd - important security fix
cat /etc/passwd | grep root:x:0: > $targetdir/etc/passwd
targetuid=`id -u $targetuser`
#winscp seems to work bad with long names with "_" char - like "template_scp"
#so we cheats it by standard "user" name
dummyuser="user"
dummyhome="/public_html"
dummyshell="/usr/bin/oafish"
cat /etc/passwd | grep $targetuser:x:$targetuid: | awk -F":" '{print "'$dummyuser':"$2":"$3":"$4":"$5":'$dummyhome':'$dummyshell'"}'>> $targetdir/etc/passwd

echo /etc/group - adding
cat /etc/group | grep root::0: > $targetdir/etc/group
targetuid=`id -u $targetuser`
cat /etc/group | grep users:: >> $targetdir/etc/group

echo /info.txt - adding
cp info.txt $targetdir/info.txt

echo
echo ok, all done set the passwd if you wont to use this account
echo or ^C when it will be an template only
echo

passwd $targetuser