pacman-cage/pacman-uncage

   1 #!/bin/bash
   2 #
   3 #   pacman-uncage
   4 #
   5 #   Copyright (c) 2002-2006 by Andrew Rose <rose.andrew@gmail.com>
   6 #   I used Judds pacman-optimise as a framework.
   7 #
   8 #   This program is free software; you can redistribute it and/or modify
   9 #   it under the terms of the GNU General Public License as published by
  10 #   the Free Software Foundation; either version 2 of the License, or
  11 #   (at your option) any later version.
  12 #
  13 #   This program is distributed in the hope that it will be useful,
  14 #   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 #   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 #   GNU General Public License for more details.
  17 #
  18 #   You should have received a copy of the GNU General Public License
  19 #   along with this program; if not, write to the Free Software
  20 #   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  21 #   USA.
  22 #
  23
  24 myver='2.9.8'
  25 dbroot="/var/lib/pacman"
  26 tmproot="/var/lib/pacman.new"
  27 pacmandb="/var/lib/pacman.db"
  28 pacmanlog=$(pacman -Qv | grep "Log File" | cut -d ":" -f2)
  29
  30 usage() {
  31         echo "pacman-uncage $myver"
  32         echo "usage: $0 [pacman_db_root]"
  33         echo
  34         echo "pacman-uncage returns your pacman db to the generic style."
  35         echo
  36 }
  37
  38 die() {
  39         echo "pacman-uncage: $*" >&2
  40         exit 1
  41 }
  42
  43 die_r() {
  44         rm -f /tmp/pacman.lck
  45         die $*
  46 }
  47
  48 if [ "$1" != "" ]; then
  49         if [ "$1" = "-h" -o "$1" = "--help" ]; then
  50                 usage
  51                 exit 0
  52         fi
  53         dbroot=$1
  54 fi
  55
  56 if [ "`id -u`" != 0 ]; then
  57         die "You must be root to uncage the database"
  58 fi
  59
  60 # added by wain: make sure pacmandb is mounted
  61 if ! mount -l | grep $dbroot >/dev/null; then
  62         die "Pacmandb must be mounted"
  63 fi
  64
  65 # make sure pacman isn't running
  66 if [ -f /tmp/pacman.lck ]; then
  67         die "Pacman lockfile was found.  Cannot run while pacman is running."
  68 fi
  69
  70 if [ ! -d $dbroot ]; then
  71         die "$dbroot does not exist or is not a directory"
  72 fi
  73
  74 # don't let pacman run while we do this
  75 touch /tmp/pacman.lck
  76
  77 # write to pacman.log
  78 echo "[ $(date "+%Y-%m-%d %H:%M ")] Pacman-cage [cmd] >> Starting and preparing pacmandb uncaging process ..." >> ${pacmanlog}
  79
  80 # step 1: sum the old db
  81 echo "==> md5sum'ing the old database..."
  82 find $dbroot -type f | sort | xargs md5sum >/tmp/pacsums.old
  83
  84 echo "==> copying pacman.db contents back, note: the time needed to get a brew is now."
  85 mkdir $tmproot
  86 cp -a $dbroot/. $tmproot
  87
  88 echo "==> unmounting old dbroot and moving new one in"
  89 umount $dbroot
  90 rmdir $dbroot
  91 mv $tmproot $dbroot
  92
  93 echo "==> md5sum'ing the new database..."
  94 find $dbroot -type f | sort | xargs md5sum >/tmp/pacsums.new
  95
  96 echo "==> checking integrity..."
  97 diff /tmp/pacsums.old /tmp/pacsums.new >/dev/null 2>&1
  98 if [ $? -ne 0 ]; then
  99         # failed, move the old one back into place
 100         rm -rf $dbroot
 101         mkdir $dbroot
 102         mount -o loop $pacmandb $dbroot
 103         echo "[ $(date "+%Y-%m-%d %H:%M ")] Pacman-cage [cmd] >> Something went wrong. $pacmandb remounted to $dbroot." >> ${pacmanlog}
 104         die_r "integrity check FAILED, reverting to old database"
 105 fi
 106
 107 echo "==> Removing old pacman.db"
 108 rm $pacmandb
 109
 110 rm -f /tmp/pacman.lck /tmp/pacsums.old /tmp/pacsums.new
 111
 112 echo "[ $(date "+%Y-%m-%d %H:%M ")] Pacman-cage [cmd] >> Pacman database has been uncaged." >> ${pacmanlog}
 113 echo
 114 echo "Finished.  Your pacman database has been uncaged!. Welcome home."
 115 #echo "You will need to remove the old mount line from your /etc/fstab"
 116 echo "You can remove 'pacmandb' from daemon's list in /etc/rc.conf file"
 117 echo
 118
 119 exit 0