With the new kernel-package hitting Sid today, and the fact that it no longer does symlink handling by default, I thought it was time that we had an example script that shows how to do that. This is a fairly full featured script, feel free to cull down to use just what you want.

I’ll post a couple of ther scripts, if there is interest in this. BTW, this script does far more than the old kernel-package postisnt script ever did.

Have fun.

    1  #!/bin/sh -
    2  #                               -*- Mode: Sh -*- 
    3  # 
    4  # This is an example of a script that can be run as a postinst hook,
    5  # and manages the symbolic links in a manner similar to the kernel
    6  # image default behaviour, except that the latest two versions (as
    7  # determined by ls -lct) are kept. You can modify this script 
    8  # 
    9  # Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009 Manoj Srivastava
   10  # Copyright 2009 Darren Salt
   11  
   12  set -e
   13  
   14  # The dir where symlinks are managed
   15  SYMLINKDIR=/
   16  
   17  if [ $# -ne 2 ]; then
   18      echo Usage: $0 version location
   19      exit 2
   20  fi
   21  
   22  version="$1"
   23  vmlinuz_location="$2"
   24  vmlinuz_dir="$(dirname "$2")"
   25  
   26  cd $SYMLINKDIR || exit 1
   27  
   28  if [ -n "$DEB_MAINT_PARAMS" ]; then
   29      eval set -- "$DEB_MAINT_PARAMS"
   30  fi
   31  
   32  if [ -z "$1" ] || [ "$1" != "configure" ]; then
   33      exit 0;
   34  fi
   35  
   36  rm -f vmlinuz vmlinuz.old vmlinuz-rd vmlinuz-rd.old initrd.img initrd.img.old 
   37  
   38  # Create a temporary file safely
   39  if [ -x /bin/tempfile ]; then
   40      outfile=$(tempfile -p outp -m 0600);
   41  else
   42      set -e
   43      mkdir /tmp/kernel-image-$version-$$
   44      outfile=/tmp/kernel-image-$version-$$/output
   45  fi
   46  
   47  (cd "$vmlinuz_dir" && ls -ct vmlinuz-*) > $outfile
   48  
   49  STD="$(head -n 1 $outfile |             sed 's/vmlinuz-//')" 
   50  OLD="$(head -n 2 $outfile | tail -n 1 | sed 's/vmlinuz-//')" 
   51  
   52  if [ "X$STD" = "X" ]; then
   53      exit 0;
   54  fi
   55  
   56  # If you want version-specific links, here's how to start
   57  STD24="$(grep vmlinuz-2.4 $outfile | head -n 1 | sed 's/vmlinuz-//')" || true
   58  OLD24="$(grep vmlinuz-2.4 $outfile | head -n 1 | tail -n 1 | sed 's/vmlinuz-//')" || true
   59  
   60  STD25="$(grep vmlinuz-2.5 $outfile | head -n 1 | sed 's/vmlinuz-//')" || true
   61  OLD25="$(grep vmlinuz-2.5 $outfile | head -n 1 | tail -n 1 | sed 's/vmlinuz-//')" || true
   62  
   63  echo Booting $STD, old is $OLD
   64  
   65  if [ -f "$vmlinuz_dir/"initrd.img-$STD ] ; then 
   66     ln -s "$vmlinuz_dir/"initrd.img-$STD initrd.img
   67     ln -s "$vmlinuz_dir/"vmlinuz-$STD vmlinuz-rd
   68  else
   69     ln -s "$vmlinuz_dir/"vmlinuz-$STD vmlinuz
   70  fi
   71  
   72  if [ "X$OLD" != "X" ]; then
   73      if [ -f "$vmlinuz_dir/"initrd.img-$OLD ] ; then
   74      ln -s "$vmlinuz_dir/"initrd.img-$OLD initrd.img.old
   75      ln -s "$vmlinuz_dir/"vmlinuz-$OLD vmlinuz-rd.old
   76      else
   77      ln -s "$vmlinuz_dir/"vmlinuz-$OLD vmlinuz.old
   78      fi
   79  fi
   80  
   81  # if [ "X$STD24" != "X" ]; then
   82  #     if [ -f "$vmlinuz_dir/"initrd.img-$STD24 ] ; then 
   83  #     ln -s "$vmlinuz_dir/"initrd.img-$STD24 initrd24.img
   84  #     ln -s "$vmlinuz_dir/"vmlinuz-$STD24 vmlinuz24-rd
   85  #     else
   86  #     ln -s "$vmlinuz_dir/"vmlinuz-$STD24 vmlinuz24
   87  #     fi
   88  # fi
   89  # if [ "X$OLD24" != "X" ]; then
   90  #     if [ -f "$vmlinuz_dir/"initrd.img-$OLD24 ] ; then
   91  #     ln -s "$vmlinuz_dir/"initrd.img-$OLD24 initrd24.img.old
   92  #     ln -s "$vmlinuz_dir/"vmlinuz-$OLD vmlinuz24-rd.old
   93  #     else
   94  #     ln -s "$vmlinuz_dir/"vmlinuz-$OLD vmlinuz24.old
   95  #     fi
   96  # fi
   97  
   98  # Run boot loaders here.
   99  #lilo
  100  
  101  rm -f $outfile 
  102  if [ -d /tmp/kernel-image-$version-$$ ]; then
  103      rmdir /tmp/kernel-image-$version-$$
  104  fi
  105  
  106  exit 0