[PATCH] scripts: prune-kernel:remove old kernels and modules dir from system

[Bhaskar Chowdhury]

This patch will remove old kernels and modules directorey related
to that kernel from the system by interactively and silently.Here
are few interactions with the scripts

1)

â ~/git-linux/linux-kbuild [master|AM 1/1 âÂ59|â]
14:52 $ ./scripts/prune-kernel -h
Usage: prune-kernel [ri]

 -r | --remove kernel_ver modules_dir_name

  -i | --interactive use as interactive way
  â-1 ~/git-linux/linux-kbuild [master|AM 1/1 âÂ59|â]
  
  14:52 $ ./scripts/prune-kernel --help
  Usage: prune-kernel [ri]

   -r | --remove kernel_ver modules_dir_name

    -i | --interactive use as interactive way
   
 2)

 â-1 ~/git-linux/linux-kbuild [master|AM 1/1 âÂ59|â]
 14:52 $ ./scripts/prune-kernel -r 5.3.3
 You need to provide kernel version and modules dir name
 
 â-1 ~/git-linux/linux-kbuild [master|AM 1/1 âÂ59|â]
 14:53 $ ./scripts/prune-kernel -r
 You need to provide kernel version and modules dir name
 
 â-1 ~/git-linux/linux-kbuild [master|AM 1/1 âÂ59|â]
 14:54 $ ./scripts/prune-kernel -r 5.3.3 5.3.3-foo

3)

$ ./scripts/prune-kernel --remove
You need to provide kernel version and modules dir name

â-1 ~/git-linux/linux-kbuild [master|AM 1/1 âÂ59|â]
14:55 $ ./scripts/prune-kernel --remove 5.3.3
You need to provide kernel version and modules dir name

â-1 ~/git-linux/linux-kbuild [master|AM 1/1 âÂ59|â]
14:55 $ ./scripts/prune-kernel --remove 5.3.3 5.3.3-foo


4)14:55 $ ./scripts/prune-kernel -i

Enter kernel version to remove or blank/empty to exit:


5)14:57 $ ./scripts/prune-kernel --interactive

Enter kernel version to remove or blank/empty to exit:
â ~/git-linux/linux-kbuild [master|AM 1/1 âÂ59|â]


6)14:59 $ ./scripts/prune-kernel --interactive

Enter kernel version to remove or blank/empty to exit:5.3.3
Please give the full modules directory name to remove:5.3.3-foo



Removed kernel version:5.3.3 and associated modules:5.3.3-foo ...Done.


7)15:00 $ ./scripts/prune-kernel -i

Enter kernel version to remove or blank/empty to exit:5.3.3
Please give the full modules directory name to remove:5.3.3-foo



Removed kernel version:5.3.3 and associated modules:5.3.3-foo ...Done.


Signed-off-by: Bhaskar Chowdhury <unixbhaskar@xxxxxxxxx>
---
 scripts/prune-kernel | 63 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)

diff --git a/scripts/prune-kernel b/scripts/prune-kernel
index a25aa2160d47..a91010d0e2af 100755
--- a/scripts/prune-kernel
+++ b/scripts/prune-kernel
@@ -1,3 +1,66 @@
 #!/bin/bash
 # SPDX-License-Identifier: GPL-2.0
+#This script will delete old kernels and modules directory related to it
+#-h with the script will show you the help
+#-r with the script take two parameter: kernel_ver and modules_dir_name
+#-i with the script allow you do the removing interactive way

+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 $0) [ri] \n"
+	printf "\n -r | --remove kernel_ver modules_dir_name \n"
+	printf "\n -i | --interactive use as interactive way \n"
+}
+
+for arg in "$@"
+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
+				if [[ $modules_version != "" ]]; then
+					remove_old_modules_dir
+					printf "\n\n\n Removed kernel version:$kernel_version and associated modules:$modules_version ...Done. \n"
+				else
+					exit 1
+				fi
+			fi
+			;;
+		-h | --help)
+			usage
+			exit 1
+			;;
+		-r | --remove)
+			if [[ $# -ne 3 ]]; then
+				printf "You need to provide kernel version and modules dir name\n"
+				exit 1
+			else
+				cd $boot_dir
+				rm -f $kernel_ver
+				cd $modules_dir
+				rm -rf $modules_dir_name
+			fi
+			;;
+	esac
+done
--
2.23.0