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Date: Sun, 27 Oct 2019 11:24:09 -0700
From: Randy Dunlap <rdunlap@...radead.org>
To: Bhaskar Chowdhury <unixbhaskar@...il.com>,
yamada.masahiro@...ionext.com, michal.lkml@...kovi.net
Cc: bfields@...ldses.org, linux-kbuild@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH] scripts:prune-kernel:prune old kernels and modules dir
On 10/24/19 10:47 PM, Bhaskar Chowdhury wrote:
> This patch will remmove old kernel and associated modules directory from
> the system.
>
> Few interaction with the script ,below
>
> 1) ✔ ~/git-linux/linux-kbuild [master ↑·18|✔]
> 10:40 $ ./scripts/prune-kernel
>
>
> 2)10:41 $ ./scripts/prune-kernel -h
> You need to use this script like this :
>
> ./scripts/prune-kernel -r kernel_version modules_directory_name
> ./scripts/prune-kernel -i option for interactive way to use it.
>
>
> 3) 10:41 $ ./scripts/prune-kernel -r 5.2.2 5.2.2-gentoo
> Removed kernel version:5.2.2 and modules directory:5.2.2-gentoo from
> the system.
>
>
> 4)10:41 $ ./scripts/prune-kernel -i
>
>
> Want to removing old kernels and modules dir [YN]: Y
> Please give another version to remove: 5.2.2
These 2 lines above could (should) be combined into one line. E.g.:
Enter kernel version to remove or blank/emtpy to exit:
> /boot/vmlinuz-5.3.7-050307-generic
> /boot/vmlinuz-5.3.6-050306-generic
> find: ‘/boot/efi’: Permission denied
too noisy.
> Please give the full modules directory name to remove: 5.2.2-gentoo
> 5.3.6-050306-generic
> 5.3.7-050307-generic
too noisy.
>
>
> Removed kernel version:5.2.2 and associated modules:5.2.2-gentoo
> ..Done.
>
>
> Signed-off-by: Bhaskar Chowdhury <unixbhaskar@...il.com>
> ---
> To Bruce,
> I have incorporated all the changes you asked for ,kindly review.
>
> scripts/prune-kernel | 75 +++++++++++++++++++++++++++++++++-----------
> 1 file changed, 56 insertions(+), 19 deletions(-)
>
> diff --git a/scripts/prune-kernel b/scripts/prune-kernel
> index e8aa940bc0a9..292ba70d7770 100755
> --- a/scripts/prune-kernel
> +++ b/scripts/prune-kernel
> @@ -1,21 +1,58 @@
> #!/bin/bash
> # SPDX-License-Identifier: GPL-2.0
> -
> -# because I use CONFIG_LOCALVERSION_AUTO, not the same version again and
> -# again, /boot and /lib/modules/ eventually fill up.
> -# Dumb script to purge that stuff:
> -
> -for f in "$@"
> -do
> - if rpm -qf "/lib/modules/$f" >/dev/null; then
> - echo "keeping $f (installed from rpm)"
> - elif [ $(uname -r) = "$f" ]; then
> - echo "keeping $f (running kernel) "
> - else
> - echo "removing $f"
> - rm -f "/boot/initramfs-$f.img" "/boot/System.map-$f"
> - rm -f "/boot/vmlinuz-$f" "/boot/config-$f"
> - rm -rf "/lib/modules/$f"
> - new-kernel-pkg --remove $f
> - fi
> -done
> +#This script will delete old kernels and modules directory related to it interactively.
> +#if you choose "-i" as interactive otherwise it will just go ahead and do the stuff once
> +#you mentione the kernel_version and modules_directory_name as parameter.
mention
or better:
enter
> +flag=$1
$flag is not used anywhere.
> +kernel_ver=$2
remove_old_kernel() uses $kernel_version, not $kernel_ver.
> +modules_dir_name=$3
remove_old_modules_dir() uses $modules_version, not $modules_dir_name.
> +boot_dir=/boot
> +modules_dir=/lib/modules
need a blank line here.
> +remove_old_kernel() {
> + cd $boot_dir
> + find $boot_dir -name "vmlinuz-*" -type f -exec ls -1 {} \;
why the 'ls'? too noisy IMO.
> + rm -If vmlinuz-$kernel_version System.map-$kernel_version config-$kernel_version
> + return 0
> +}
need a blank line here.
> +remove_old_modules_dir() {
> + cd $modules_dir
> + find $modules_dir -maxdepth 0 -type d -exec ls -1 {} \;
'ls' is too noisy.
> + rm -rf $modules_version
> + return 0
> +}
> +while getopts :hir opt;
$opt is not used anywhere.
Does 'getopt's support long option strings? E.g.,
--interactive, --help, --remove.
> +do
'do' has a trailing space after it. drop it.
> + case "$1" in
Is $1 the same as $flag here?
> + -i | --interactive)
bad indentation above.
> + printf "\n\n Want to removing old kernels and modules dir [YN]: %s"
> + read response
> + if [[ $response == "Y" ]];then
> + printf "Please give another version to remove: %s"
> + read kernel_version
> + remove_old_kernel
> + printf "Please give the full modules directory name to remove: %s"
> + read modules_version
> + remove_old_modules_dir
> + printf "\n\n\n Removed kernel version:$kernel_version and associated modules:$modules_version ..Done. \n\n"
> + elif [[ $response == "N" ]];then
> + exit 1
> + fi
> + ;;
> + -h | --help)
bad indentation.
> +
line above is just a bunch of spaces. bad.
> + printf "You need to use this script like this :\n
use tabs to indent, not spaces.
> + $0 -r kernel_version modules_directory_name\n
> + $0 -i option for interactive way to use it.\n\n"
inconsistent indentation.
> +
line above is just spaces. Empty lines are OK, even good for
readablility, but they should not end with spaces or tabs.
> + exit 1
> + ;;
> + -r | --remove)
> + shift $(( OPTIND - 1 ))
What is the purpose of the shift, when this case ends with exit?
> + rm -f kernel_ver
$kernel_ver
Probably need to cd $boot_dir for above 'rm'.
or just rm -f $boot_dir/$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
esac indentation does not match case.
> + done
done indentation does not match do.
Nack.
--
~Randy
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