linux-kernel - [PATCH] scripts:prune-kernel:prune kernel and modules dir from the system

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Date:   Tue, 29 Oct 2019 08:30:30 +0530
From:   Bhaskar Chowdhury <unixbhaskar@...il.com>
To:     rdunlap@...radead.org, bfields@...ldses.org
Cc:     yamada.masahiro@...ionext.com, michal.lkml@...kovi.net,
        linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
        Bhaskar Chowdhury <unixbhaskar@...il.com>
Subject: [PATCH] scripts:prune-kernel:prune kernel and modules dir from the system

This patch will remove old kernel and modules directory from 
the system interactive way and also at once ,provied the parameter
given to the invoking script.

Signed-off-by: Bhaskar Chowdhury <unixbhaskar@...il.com>
---
 scripts/prune-kernel | 58 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)

diff --git a/scripts/prune-kernel b/scripts/prune-kernel
index 58a7650ce592..a6c990450ddc 100755
--- a/scripts/prune-kernel
+++ b/scripts/prune-kernel
@@ -1,2 +1,60 @@
 #!/bin/bash
 # SPDX-License-Identifier: GPL-2.0
+#This script will delete old kernels and modules directory related to it,both
+#automated and interactive way, if you choose -i or --interactive as parameter.
+#For normal operation you have to invoke this script like below
+#prune-kernel -r kernel_ver modules_dir_name
+flag=$1
+kernel_ver=$2
+modules_dir_name=$3
+boot_dir=/boot
+modules_dir=/lib/modules
+
+remove_old_kernel() {
+	cd $boot_dir
+	rm -If vmlinuz-$kernel_version System.map-$kernel_version config-$kernel_version
+	return 0
+}
+
+remove_old_modules_dir() {
+	cd $modules_dir
+	rm -rf $modules_version
+	return 0
+}
+
+usage() {
+	printf "Usage: $(basename $0) [-ri] \n"
+	printf "\n -r | --remove kernel_ver modules_dir_name \n"
+	printf "\n -i | --interactive use as interactive way \n"
+}
+
+while getopts :hir opt;do
+	case "$flag" in
+		-i | --interactive)
+			printf "\nEnter kernel version to remove or blank/empty to exit:%s"
+			read kernel_version
+			if [[ $kernel_version != "" ]]; then
+				remove_old_kernel
+				printf "Please give the full modules directory name to remove:%s"
+				read modules_version
+				remove_old_modules_dir
+				printf "\n\n\n Removed kernel version:$kernel_version and associated modules directory:$modules_version ..Done.\n"
+			else
+				exit 1
+			fi
+			;;
+		-h | --help)
+			usage
+			exit 1
+			;;
+		-r | --remove)
+			shift $(( OPTIND -1 ))
+			cd $boot_dir
+			rm -f $kernel_ver
+			cd $modules_dir
+			rm -rf $modules_dir_name
+			printf "Removed kernel version:$kernel_ver and modules directory:$modules_dir_name from the system. \n\n"
+			exit 0
+			;;
+	esac
+done
--
2.23.0