| 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
| ||
|
Message-ID: <CAK7LNARAgOEnMRYAyzbvJ-xZzFfwOMckxb=bW0-E+P1HYu5nhA@mail.gmail.com>
Date: Wed, 6 Nov 2019 11:53:28 +0900
From: Masahiro Yamada <yamada.masahiro@...ionext.com>
To: "J. Bruce Fields" <bfields@...ldses.org>
Cc: Randy Dunlap <rdunlap@...radead.org>,
Bhaskar Chowdhury <unixbhaskar@...il.com>,
Michal Marek <michal.lkml@...kovi.net>,
Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] scripts:prune-kernel:remove old kernels and modules dir
from system
On Tue, Nov 5, 2019 at 11:32 AM J. Bruce Fields <bfields@...ldses.org> wrote:
>
> On Mon, Nov 04, 2019 at 06:03:13PM -0800, Randy Dunlap wrote:
> > On 11/1/19 11:30 PM, Bhaskar Chowdhury wrote:
> > > This patch allow you to remove old kernels and associated modules
> > > directory from the system.You can do it at once with the -r flag
> > > and interactively with the -i flag.
> > >
> > > Signed-off-by: Bhaskar Chowdhury <unixbhaskar@...il.com>
> > > ---
> > > scripts/prune-kernel | 82 +++++++++++++++++++++++++++++++++++---------
> > > 1 file changed, 65 insertions(+), 17 deletions(-)
> >
> > Hi,
> > I believe that this script now does what the patch author intends it to do.
> > It does have a few whitespace issues, but no big deals. (see below)
>
> My original comment stands: looks like it prompts for full module path
> and kernel versions which means it's no more convenient than just doing
> an "ls" and then removing the ones you want to. (In fact, with "rm"
> you'd also get the benefit of tab completion....)
>
> It's quite different from the original script and I don't really see the
> advantage.
>
> --b.
I am with Bruce.
This patch is trying to replace everything
with worse code.
BTW.
Bruce,
Does the current script expect RHEL or something?
I do not see 'new-kernel-pkg' on my Ubuntu machine.
It would still work with 'new-kernel-pkg: command not found'
warning.
We could bypass it if we like.
command -v new-kernel-pkg && new-kernel-pkg --remove $f
Masahiro Yamada
> >
> > Tested-by: Randy Dunlap <rdunlap@...radead.org>
> >
> >
> > > diff --git a/scripts/prune-kernel b/scripts/prune-kernel
> > > index e8aa940bc0a9..01d0778db71f 100755
> > > --- a/scripts/prune-kernel
> > > +++ b/scripts/prune-kernel
> > > @@ -1,21 +1,69 @@
> > > #!/bin/bash
> > > # SPDX-License-Identifier: GPL-2.0
> > > +#This script will remove old kernels and modules directory related to it.
> > > +#"-r" or "--remove" show how to silently remove old kernel and modules dir.
> > > +# "-h" or "--help" show how to use this script or show without parameter.
> > > +#"-i" or "--interactive" show how to remove interactively.
> > > +
> > > +flag=$1
> > > +kernel_version=$2
> > > +modules_version=$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 $0) [-ri]\n"
> > > + printf "\n -r or --remove kernel_version modules_version\n"
> > > + printf "\n -i or --interactive do as interactive way\n"
> > > + return 0
> > > +}
> > > +
> > > +case "$flag" in
> > > + -i | --interactive)
> > > + printf "\nEnter kernel version to remove or blank/empty to exit:"
> > > + read kernel_version
> > > + if [[ $kernel_version != "" ]]; then
> > > + remove_old_kernel
> > > + printf "\nRemoved kernel version:$kernel_version from the system.\n\n"
> >
> > space after ':'
> >
> > drop one \n above.
> >
> > > + printf "Please give the full modules directory name to remove:"
> > > + read modules_version
> > > + if [[ $modules_version != "" ]]; then
> > > + remove_old_modules_dir
> > > + printf "\n\nRemoved modules directory:$modules_version from the system.\n\n"
> >
> > space after ':'
> >
> > drop one \n above.
> >
> > > + else
> > > + exit 1
> > > + fi
> > > + fi
> > > + ;;
> > > + -h | --help)
> > > + usage
> > > + exit 0
> > > + ;;
> > > + -r | --remove)
> > > + if [[ $# -ne 3 ]]; then
> > > + printf "You need to provide kernel version and modules directory name.\n"
> > > + exit 1
> > > + else
> > > + remove_old_kernel
> > > + remove_old_modules_dir
> > > + fi
> > > + ;;
> > > + *)
> > > + usage
> > > + exit 1
> > > + ;;
> > > +esac
> > >
> > > -# because I use CONFIG_LOCALVERSION_AUTO, not the same version again and
> > > -# again, /boot and /lib/modules/ eventually fill up.
> > > -# Dumb script to purge that stuff:
> > >
> >
> > OK, the former script's loop is removed.. good.
> > But the 2 preceding blank lines are not removed, so the script
> > now ends with 2 unnecessary blank lines.
> >
> > > -for f in "$@"
> > > -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
> > > --
> >
> >
> > --
> > ~Randy
--
Best Regards
Masahiro Yamada
Powered by blists - more mailing lists