srcpkgs/base-files/files/vkpurge

   1 #!/bin/sh
   2 #
   3 # A simple script to remove old kernel files/modules.
   4 # Brought to you by yours truly Juan RP in the Public Domain.
   5 #
   6 : ${progname:=$(basename $0)}
   7
   8 case "$(xbps-uhelper arch)" in
   9     aarch64*) KIMAGE="vmlinux";;
  10     *) KIMAGE="vmlinuz";;
  11 esac
  12
  13 usage()
  14 {
  15         cat <<_EOF
  16 Usage: $progname <target> [<version>]
  17
  18 Targets:
  19  list                   Lists old installed kernels.
  20  rm <version...|all>    Remove kernel <version> or all old kernels.
  21
  22 Example:
  23         $ $progname list
  24         $ $progname rm 4.9.81_1
  25 _EOF
  26         exit 1
  27 }
  28
  29 list_kernels()
  30 {
  31         local k kpkg installed kver _f
  32
  33         for k in /boot/$KIMAGE-*; do
  34                 _f=$(basename $k)
  35                 kver=$(echo ${_f}|sed -e 's|-rc|rc|')
  36                 installed=$(xbps-query -o "$k" 2>/dev/null)
  37                 [ -n "$installed" ] && continue
  38                 kpkg="$(xbps-uhelper getpkgversion ${_f} 2>/dev/null)"
  39                 [ "$(uname -r)" = "$kpkg" ] && continue
  40                 [ -n "$kpkg" ] && echo "$kpkg"
  41         done
  42 }
  43
  44 run_hooks()
  45 {
  46         local dir="$1"
  47         local kver="$2"
  48         local d
  49
  50         for d in /etc/kernel.d/${dir}/*; do
  51                 [ ! -x "$d" ] && continue
  52                 echo "Running ${dir} kernel hook: $(basename $d)..."
  53                 $d kernel $kver
  54         done
  55 }
  56
  57 remove_kernel()
  58 {
  59         local rmkver="$1"
  60         local installed f kfile
  61
  62         if [ ! -f /boot/$KIMAGE-${rmkver} -a ! -d /lib/modules/${rmkver} ]; then
  63                 echo "Kernel ${rmkver} not installed."
  64                 exit 0
  65         fi
  66
  67         installed=$(xbps-uhelper version "linux${rmkver%*.*}" 2>/dev/null)
  68         if [ -n "$installed" -a "$installed" = "$rmkver" ]; then
  69                 echo "Kernel $rmkver is currently installed."
  70                 exit 0
  71         fi
  72
  73         # Execute pre-remove kernel hooks.
  74         run_hooks pre-remove $rmkver
  75         # Remove kernel files in /boot.
  76         for f in config System.map $KIMAGE; do
  77                 kfile="/boot/${f}-${rmkver}"
  78                 [ ! -f "${kfile}" ] && continue
  79                 echo "Removing ${kfile}..."
  80                 rm -f ${kfile}
  81         done
  82         # Remove kernel modules
  83         if [ -d "/lib/modules/${rmkver}" ]; then
  84                 echo "Removing /lib/modules/${rmkver}..."
  85                 rm -rf /lib/modules/${rmkver}
  86         fi
  87         # Execute post-remove kernel hooks.
  88         run_hooks post-remove $rmkver
  89         # Remove kernel-headers.
  90         if [ -d /usr/src/kernel-headers-${rmkver} ]; then
  91                 rm -rf /usr/src/kernel-headers-${rmkver}
  92         fi
  93         # Remove debugging symbols.
  94         dfile=/usr/lib/debug/boot/vmlinux-${rmkver}
  95         if [ -f "${dfile}" ]; then
  96                 echo "Removing ${dfile}..."
  97                 rm -f ${dfile}
  98         fi
  99         if [ -d /usr/lib/debug/usr/lib/modules/${rmkver} ]; then
 100                 echo "Removing /usr/lib/debug/usr/lib/modules/${rmkver}..."
 101                 rm -rf /usr/lib/debug/usr/lib/modules/${rmkver}
 102         fi
 103 }
 104
 105 if [ "$1" = "list" ]; then
 106         list_kernels
 107 elif [ "$1" = "rm" ]; then
 108         if [ "$(id -u)" -ne 0 ]; then
 109                 echo "You have to run this script as root!"
 110                 exit 1
 111         fi
 112
 113         if [ -z "$2" ]; then
 114                 usage
 115         elif [ "$2" = "all" ]; then
 116                 kernels=$(list_kernels)
 117                 for k in ${kernels}; do
 118                         echo "Removing kernel $k files ..."
 119                         remove_kernel "$k"
 120                 done
 121         else
 122                 shift
 123                 for k; do
 124                         echo "Removing kernel $k files ..."
 125                         remove_kernel "$k"
 126                 done
 127         fi
 128 else
 129         usage
 130 fi
 131
 132 exit 0