Re: [PATCH] scripts : prune-kernel : prune kernels generalized way

[Bhaskar Chowdhury <unixbhaskar@xxxxxxxxx>]

On 09:08 Wed 16 Oct 2019, Randy Dunlap wrote:
> On 10/15/19 11:13 PM, Bhaskar Chowdhury wrote:
> > This patch will remove old kernel from the system in a selective way.
> >
> > Signed-off-by: Bhaskar Chowdhury <unixbhaskar@xxxxxxxxx>
> > ---
> > Thanks, a bunch to Randy for the hand holding . :)
>
> Hi Bhaskar,
>
> First problem is that patch complains:
>
> checking file scripts/prune-kernel
> Using Plan A...
> patch: **** malformed patch at line 87: 2.21.0
>
> IOW, this patch does not apply cleanly.

Whoops! Sending the patch with all the corrections. 

> More comments below.
>
>
> >  scripts/prune-kernel | 71 ++++++++++++++++++++++++++++++++++++--------
> >  1 file changed, 59 insertions(+), 12 deletions(-)
> >
> > diff --git a/scripts/prune-kernel b/scripts/prune-kernel
> > index e8aa940bc0a9..78dd4c854b2b 100755
> > --- a/scripts/prune-kernel
> > +++ b/scripts/prune-kernel
> > @@ -5,17 +5,64 @@
> >  # 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
> > +boot_dir=/boot
> > +modules_dir=/lib/modules
> > +
> > +function remove_old_kernel(){
> > +	cd $boot_dir
> > +	rm -If vmlinuz-$kenrel_version System.map-$kernel_version config-$kernel_verison
>
> Typos:
> 	               $kernel_version                                   $kernel_version
>
> I.e., you can't have tested this.
Fixed.
> > +}
> > +function remove_old_kernel_modules_dir(){
> > +	cd $modules_dir
> > +	rm -rf $modules_version
> > +}
> > +printf "\n\n Enlist the installed kernels \n\n"
> > +
> > +find $boot_dir -name "vmlinuz-*" -type f  -exec ls -1 {} \;
> > +
> > +printf "\n\n\n Please give the kernel version to remove: %s"
> > +read kernel_version
> > +
>
> If I enter nothing here, no need to call remove_old_kernel.
Okay, terminate it there, because allowing defeat the purpose 
of the script.
> > +remove_old_kernel
> > +
> > +printf "\n\n Enlist the installed modules directory \n\n"
> > +
> > +find $modules_dir  -maxdepth 0 -type d -exec ls -1 {} \;
> > +
> > +printf "\n\n Please give the full modules directory name to remove: %s"
> > +read modules_version
>
> If I enter nothing here, don't call remove_old_kernel_modules_dir.
It will not reach here, because we have terminated it above.
> > +
> > +remove_old_kernel_modules_dir
> > +
> > +printf "\n\n Removed kernel version: $kernel_version and associcated modules: $modules_version ...Done \n"
>
>       typo:                                                associated
Fixed.
> > +while :
> >  do
>
> Why is the "do" line missing a '+'?  The only do/done in the current script
> are already listed above as being commented out.
>
> > +printf "\n\n Do you want to remove another?[YN] : %s"
> > +read response
> > +
> > +if [[ $response == "Y" ]];then
> > +	printf "Please give another version to remove : %s"
> > +	read kernel_version
> > +	remove_old_kernel
> > +	printf "\n\n Please give the full modules directory name to remove: %s"
> > +	read modules_version
> > +	remove_old_kernel_modules_dir
> > +elif [[ $response == "N" ]];then
> > +	printf "\n\n Alright,no more. \n\n"
>
> Just exit, no printf needed.
>
> > +	exit 1
> > +fi
> >  done

> Same comment for "done" as for "do" above.
I must have done something wrong that is why...now fixed it.
> > --
> > 2.21.0
Thank you Randy, and extremely sorry to gobbles up your and everyones
time...heck..
> --
> ~Randy

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