#!/bin/bash
#
#  rssh-chroot.SlackBuild 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 any later version.
#
#  rssh-chroot.SlackBuild 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.,
#  59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
#
# slackbuild for rssh-chroot, by Silvio Rhatto
# requires: rssh 
# tested: rssh-chroot-2.3.2
#

# Look for slackbuildrc
if [ -f ~/.slackbuildrc ]; then
  source ~/.slackbuildrc
elif [ -f /etc/slackbuildrc ]; then
  source /etc/slackbuildrc
fi

# Set variables
CWD="$(pwd)"
SRC_NAME="rssh"
PKG_NAME="rssh-chroot"
ARCH=${ARCH:=i486}
SRC_VERSION=${VERSION:=2.3.2}
PKG_VERSION="$(echo "$SRC_VERSION" | tr '[[:blank:]-]' '_')"
BUILD=${BUILD:=1rha}
SRC_DIR=${SRC_DIR:=$CWD}/$PKG_NAME
TMP=${TMP:=/tmp}
PKG=${PKG:=$TMP/package-$PKG_NAME}
REPOS=${REPOS:=$TMP}
PREFIX=${PREFIX:=/usr}
PKG_WORK="$TMP/$SRC_NAME"
CONF_OPTIONS=${CONF_OPTIONS:=""}
NUMJOBS=${NUMJOBS:=""}

# Set error codes (used by createpkg)
ERROR_WGET=31;      ERROR_MAKE=32;      ERROR_INSTALL=33
ERROR_MD5=34;       ERROR_CONF=35;      ERROR_HELP=36
ERROR_TAR=37;       ERROR_MKPKG=38;     ERROR_GPG=39
ERROR_PATCH=40;     ERROR_VCS=41;       ERROR_MKDIR=42

# Clean up any leftovers of previous builds
rm -rf "$PKG_WORK" 2> /dev/null
rm -rf "$PKG" 2> /dev/null

# Create directories if necessary
mkdir -p "$SRC_DIR" || exit $ERROR_MKDIR
mkdir -p "$PKG" || exit $ERROR_MKDIR
mkdir -p "$REPOS" || exit $ERROR_MKDIR
mkdir -p "$PKG_WORK" || exit $ERROR_MKDIR

# Adjust to where your rssh chroot system will be located
CHROOT_BASE="/var/users"
mkdir -p $PKG/$CHROOT_BASE/{bin,etc,lib,lib/tls,usr/lib,usr/libexec,usr/bin,usr/doc,home,dev}

if [ "$ARCH" == "x86_64" ]; then
  mkdir -p $PKG/$CHROOT_BASE/{lib64/tls,usr/lib64}
fi

for ldfile in ld.so.cache ld.so.conf ld.so.preload; do
  if [ -f "/etc/$ldfile" ]; then
    cp /etc/$ldfile $PKG/$CHROOT_BASE/etc
  fi
done

# Inspired by http://www.howtoforge.com/chrooted_ssh_howto_debian_p2
APPS="/usr/bin/rssh /usr/bin/scp /usr/libexec/sftp-server /usr/libexec/rssh_chroot_helper"
for app in $APPS; do
  cp $app $PKG/$CHROOT_BASE/$app

  # Get a list of related libraries
  ldd $app > /dev/null
  if [ "$?" = 0 ] ; then
    libs="`ldd $app | sed -e 's/=>//' -e 's/(.*)//' | awk '{ print $1 "\n" $2 }'`"
    for lib in $libs; do
      if [ -a "$lib" ]; then
        mkdir -p $PKG/$CHROOT_BASE/`dirname $lib` > /dev/null 2>&1
        cp $lib $PKG/$CHROOT_BASE/$lib
      fi
    done
  fi
done

# Might not work inside vservers
echo "Trying to create /dev/null inside this jail..."
echo "May not work if you're creating this package inside a vserver"
mknod -m 666 $PKG/$CHROOT_BASE/dev/null c 1 3 || exit $ERROR_INSTALL

mkdir -p $PKG/usr/doc/$PACKAGE-$VERSION
cp $CWD/COPYING* $PKG/usr/doc/$PACKAGE-$VERSION/

chmod 755 $PKG/$CHROOT_BASE/{bin,etc,lib,lib/tls,usr/lib,usr/libexec,usr/bin,usr/doc,dev}
chmod 111 $PKG/$CHROOT_BASE/home

# Add package description (slack-desc)
mkdir -p "$PKG/install" || exit $ERROR_MKDIR
cat << EODESC > "$PKG/install/slack-desc"
# HOW TO EDIT THIS FILE:
# The "handy ruler" below makes it easier to edit a package description. Line
# up the first '|' above the ':' following the base package name, and the '|'
# on the right side marks the last column you can put a character in. You must
# make exactly 11 lines for the formatting to be correct.  It's also
# customary to leave one space after the ':'.

           |-----handy-ruler--------------------------------------------------|
rssh-chroot: rssh-chroot: a chroot jail to use with rssh restricted secure shell 
rssh-chroot: 
rssh-chroot: 
rssh-chroot: 
rssh-chroot: 
rssh-chroot: 
rssh-chroot: 
rssh-chroot: 
rssh-chroot: 
rssh-chroot: 
rssh-chroot: 
EODESC

# Add a post-installation script (doinst.sh)
mkdir -p "$PKG/install" || exit $ERROR_MKDIR
cat << EOSCRIPT > "$PKG/install/doinst.sh"
config() {
  NEW="\$1"
  OLD="\$(dirname \$NEW)/\$(basename \$NEW .new)"
  OLD="\$(dirname \$NEW)/\$(basename \$OLD .sample)"
  OLD="\$(dirname \$NEW)/\$(basename \$OLD .dist)"

  # If there's no config file by that name, mv it over:
  if [ ! -r \$OLD ]; then
    mv \$NEW \$OLD
  elif [ "\$(cat \$OLD | md5sum)" = "\$(cat \$NEW | md5sum)" ]; then
    # toss the redundant copy
    rm \$NEW
  fi
  # Otherwise, we leave the .new copy for the admin to consider...
}

mkgroup() {
  GROUP="\$1"
  if ! grep -qe "^\$GROUP:" etc/group; then
    echo Creating group \$GROUP...
    chroot . /usr/sbin/groupadd \$GROUP
  fi
}

mkuser() {
  USER="\$1"
  if [ ! -z "\$2" ]; then
    GROUP="\$2"
  else
    GROUP="\$USER"
  fi
  if ! grep -qe "^\$USER:" etc/passwd; then
    echo Creating user \$USER...
    chroot . /usr/sbin/useradd \$USER -g \$GROUP
  fi
}

( echo Please check if $CHROOT_BASE/dev/null was correctly created )
EOSCRIPT

# Copy slack-required
mkdir -p "$PKG/install" || exit $ERROR_MKDIR
if [ -f "$CWD/slack-required" ]; then
  cp $CWD/slack-required $PKG/install
fi

# Build the package
cd "$PKG"
makepkg -l y -c n "$REPOS/$PKG_NAME-$PKG_VERSION-$ARCH-$BUILD.tgz" || exit $ERROR_MKPKG

# Delete source and build directories if requested
if [ "$CLEANUP" == "yes" ] || [ "$1" = "--cleanup" ]; then
  rm -rf "$PKG_WORK" "$PKG"
fi