#!/bin/bash
#  Copyright (C) 2008, 2009, 2010  Matias A. Fonzo, <selk@dragora.org>
#
#  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 3 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, see <http://www.gnu.org/licenses/>.

# Registro de cambios:
# (#)1.2 Vie Ene  8 17:16:29 ART 2010  (Fonzo)
# - Herramienta renombrada a "modtool".
#
# (#)1.1 Sáb Ene  3 01:41:13 ARST 2009 (Fonzo)
# - Herramienta renombrada a "modlist".
# - Ahora usamos "modprobe" en vez de "find" para scanear los
#   módulos instalados.  Es mejor para el propósito de esta
#   herramienta, e incluso un poco más rápido.
# - Arreglado la ruta de búsqueda para /lib/modules/KVERSION/kernel,
#   ahora también abarcamos /lib/modules/KVERSION/misc (por ejemplo).
# - Si no se especifíca un argumento para la opción "-k" utiliza la
#   versión actual del Kernel.

if [[ $# -eq 0 || $1 = -h || $1 = --help ]]; then
  cat << EOF
Usage: modtool [OPTION] [KERNEL_VERSION]
Generates a complete list of kernel modules.

Options:

  -h, --help               show this help and exit
  -k, --kernel             Makes a list of kernel modules
                           from the current version or a
                           specific version

modtool version 1.2.
EOF
  exit;
fi

TMP=/tmp

if [[ $1 = -k || $1 = --kernel ]]; then
  shift 1
  if [[ -z $1 ]]; then
    KVER=$(uname -r)
  else
    KVER=$1
  fi
  if [[ ! -d /lib/modules/$KVER ]]; then
    echo "modtool: /lib/modules/$KVER: is not a valid directory."
    exit 1
  fi
  ( cd /lib/modules/$KVER
    echo "Scanning the contents of /lib/modules/$KVER..."
    echo "#!/bin/sh" > $TMP/rc.modules-$KVER
    echo -e "#\n# Uncomment the module(s) that you need:\n" >> $TMP/rc.modules-$KVER
    modprobe -l --set-version $KVER | LC_ALL=C sort | while read line ; do
      modname=${line##*/}
      modname=${modname%.ko}
      modinfo -k $KVER "$modname" | while read info ; do
        echo "# $info" >> $TMP/rc.modules-$KVER
      done
      echo -e "#\n#/sbin/modprobe $modname\n" >> $TMP/rc.modules-$KVER
    done
  )
  ( cd $TMP
    fmt -s -u < rc.modules-$KVER | \
     awk '!/^#/{printf "# "} { print }' > rc.modules-${KVER}.formatted
    sed -i 's/^#.$//' rc.modules-${KVER}.formatted
    mv rc.modules-${KVER}.formatted rc.modules-$KVER
  )
  if [[ -r $TMP/rc.modules-$KVER ]]; then
    ( cd /etc/rc.d || exit 1
      echo "Saving rc.modules-$KVER in /etc/rc.d directory..."
      current=$(readlink -e rc.modules)
      if [[ -n $current ]]; then
        echo "Making backup of $current to ${current}.bak..."
        mv -i $current ${current}.bak
      fi
      mv $TMP/rc.modules-$KVER .
      rm -f rc.modules
      ln -s rc.modules-$KVER rc.modules
      chown root:root rc.modules-$KVER
      chmod 755 rc.modules-$KVER
    )
  fi
  unset KVER
fi

unset TMP