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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 30 Oct 2019 15:24:45 +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:remove old kernels and modules dir from system

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)

✔ ~/git-linux/linux-kbuild [master|AM 1/1 ↑·59|✔]
14:52 $ ./scripts/prune-kernel -h
Usage: prune-kernel [ri]

 -r | --remove kernel_ver modules_dir_name

  -i | --interactive use as interactive way
  ✘-1 ~/git-linux/linux-kbuild [master|AM 1/1 ↑·59|✔]
  
  14:52 $ ./scripts/prune-kernel --help
  Usage: prune-kernel [ri]

   -r | --remove kernel_ver modules_dir_name

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

 ✘-1 ~/git-linux/linux-kbuild [master|AM 1/1 ↑·59|✔]
 14:52 $ ./scripts/prune-kernel -r 5.3.3
 You need to provide kernel version and modules dir name
 
 ✘-1 ~/git-linux/linux-kbuild [master|AM 1/1 ↑·59|✔]
 14:53 $ ./scripts/prune-kernel -r
 You need to provide kernel version and modules dir name
 
 ✘-1 ~/git-linux/linux-kbuild [master|AM 1/1 ↑·59|✔]
 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

✘-1 ~/git-linux/linux-kbuild [master|AM 1/1 ↑·59|✔]
14:55 $ ./scripts/prune-kernel --remove 5.3.3
You need to provide kernel version and modules dir name

✘-1 ~/git-linux/linux-kbuild [master|AM 1/1 ↑·59|✔]
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:
✔ ~/git-linux/linux-kbuild [master|AM 1/1 ↑·59|✔]


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@...il.com>
---
 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