116 lines
2.2 KiB
Bash
116 lines
2.2 KiB
Bash
#!/bin/sh
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#
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# A simple script to remove old kernel files/modules.
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# Brought to you by yours truly Juan RP in the Public Domain.
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#
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: ${progname:=$(basename $0)}
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usage()
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{
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cat <<_EOF
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Usage: $progname <target> [<version>]
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Targets:
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list Lists old installed kernels.
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rm <version|all> Remove kernel <version> or all old kernels.
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Example:
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$ $progname list
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$ $progname rm 2.6.39.2
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_EOF
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exit 1
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}
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list_kernels()
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{
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local k kpkg installed kver kvertmp skip
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for k in /var/lib/initramfs-tools/*; do
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kver=$(basename $k)
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kvertmp=$(basename $k|sed -e 's|-rc|rc|')
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for kpkg in kernel kernel-snapshot; do
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installed=$(xbps-uhelper -r / version $kpkg)
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if [ "$installed" = "$kvertmp" ]; then
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skip=1
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break
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fi
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done
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if [ -n "$skip" ]; then
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unset skip
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continue
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fi
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echo "$kver"
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done
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}
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run_hooks()
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{
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local dir="$1"
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local kver="$2"
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local d
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for d in /etc/kernel.d/${dir}/*; do
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[ ! -x "$d" ] && continue
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echo "Running ${dir} kernel hook: $(basename $d)..."
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$d kernel $kver
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done
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}
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remove_kernel()
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{
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local rmkver="$1"
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local installed f kfile
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if [ ! -f /boot/vmlinuz-${rmkver} -a ! -d /lib/modules/${rmkver} ]; then
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echo "Kernel ${rmkver} not installed."
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exit 0
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fi
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installed=$(xbps-uhelper -r / version $rmkver)
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if [ -n "$installed" ]; then
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echo "Kernel $rmkver is currently installed."
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exit 0
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fi
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# Execute pre-remove kernel hooks.
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run_hooks pre-remove $rmkver
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# Remove kernel files in /boot.
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for f in config System.map vmlinuz; do
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kfile="/boot/${f}-${rmkver}"
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[ ! -f "${kfile}" ] && continue
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echo "Removing ${kfile}..."
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rm -f ${kfile}
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done
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# Remove kernel modules
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if [ -d "/lib/modules/${rmkver}" ]; then
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echo "Removing /lib/modules/${rmkver}..."
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rm -rf /lib/modules/${rmkver}
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fi
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# Execute post-remove kernel hooks.
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run_hooks post-remove $rmkver
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# Make sure there are no stale files.
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if [ -f /var/lib/initramfs-tools/${rmkver} ]; then
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rm -f /var/lib/initramfs-tools/${rmkver}
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fi
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}
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if [ "$1" = "list" ]; then
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list_kernels
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elif [ "$1" = "rm" ]; then
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if [ -z "$2" ]; then
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usage
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elif [ "$2" = "all" ]; then
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kernels=$(list_kernels)
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for k in ${kernels}; do
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remove_kernel "$k"
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done
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else
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remove_kernel "$2"
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fi
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else
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usage
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fi
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exit 0
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