scripts: prune-kernel : prune kernels generalized way
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Message ID 20191019130722.8067-1-unixbhaskar@gmail.com
State New
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  • scripts: prune-kernel : prune kernels generalized way
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Commit Message

Bhaskar Chowdhury Oct. 19, 2019, 1:07 p.m. UTC
This patch will remove old kernel from the system in a selective way.

Signed-off-by: Bhaskar Chowdhury <unixbhaskar@gmail.com>
---
 scripts/prune-kernel | 86 ++++++++++++++++++++++++++++++++++++--------
 1 file changed, 72 insertions(+), 14 deletions(-)

--
2.21.0

Comments

Bruce Fields Oct. 19, 2019, 4:01 p.m. UTC | #1
On Sat, Oct 19, 2019 at 06:37:22PM +0530, Bhaskar Chowdhury wrote:
> This patch will remove old kernel from the system in a selective way.

Please don't comment out code, just delete it, git's there to keep the
old code.

There's some redundant code that should be inside a loop.

A little more detail in the changelog might be useful to those of us who
are lazy about reading bash script....

Looks like this just prompts for each individual delete?  Actually it
looks like it requires the user to enter the module path and kernel
version for each one which makes it not much more convenient use than a
bare "ls" and "rm".

I personally use this in unattended scripts.  I mean, I don't really
care what we do with this, as I use my own copy of the script, so
whatever's useful to more people is fine.

But if somebody does actually use it as-is, it'd be nicer to keep the
current behavior and add an option ("-i" or something) for the
interactive behavior.

--b.

> 
> Signed-off-by: Bhaskar Chowdhury <unixbhaskar@gmail.com>
> ---
>  scripts/prune-kernel | 86 ++++++++++++++++++++++++++++++++++++--------
>  1 file changed, 72 insertions(+), 14 deletions(-)
> 
> diff --git a/scripts/prune-kernel b/scripts/prune-kernel
> index e8aa940bc0a9..9d839a4e4539 100755
> --- a/scripts/prune-kernel
> +++ b/scripts/prune-kernel
> @@ -5,17 +5,75 @@
>  # 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 $f
> -        fi
> -done
> +#for f in "$@"
> +#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 $boot_dir
> +	rm -If vmlinuz-$kernel_version System.map-$kernel_version config-$kernel_version
> +}
> +
> +function remove_old_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 [[ $kernel_version == "" ]];then
> +	exit 1
> +else
> +	remove_old_kernel
> +fi
> +
> +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 [[ $modules_version == "" ]];then
> +	printf "You have forgotten to give the modules dir to remove"
> +else
> +	remove_old_modules_dir
> +fi
> +
> +printf "\n\n\n Removed kernel version:$kernel_version and associated modules:$modules_version ...Done \n"
> +
> +while :
> + do
> +    printf "\n\n Do you want to remove another?[YN]: %s"
> +    read response
> +       if [[ $response == "Y" ]];then
> +	 printf "Please give another version to remove: %s"
> +	 read kernel_version
> +	 remove_old_kernel
> +	 printf "Please give the full modules directory name to remove: %s"
> +	 read modules_version
> +	 remove_old_modules_dir
> +	 printf "\n\n\n Removed kernel version:$kernel_version and associated modules:$modules_version ..Done \n\n"
> +      elif [[ $response == "N" ]];then
> +	 exit 1
> +    fi
> + done
> --
> 2.21.0
Bhaskar Chowdhury Oct. 19, 2019, 10:16 p.m. UTC | #2
On 12:01 Sat 19 Oct 2019, J. Bruce Fields wrote:
>On Sat, Oct 19, 2019 at 06:37:22PM +0530, Bhaskar Chowdhury wrote:
>> This patch will remove old kernel from the system in a selective way.
>
>Please don't comment out code, just delete it, git's there to keep the
>old code.
>
I thought it would be more appropriate to know user why it's written in
first place.So ,deleting is not a good idea!

>There's some redundant code that should be inside a loop.
I don't want to make thing unnecessary complicated. Two more line
,scripts like this, doesn't harm at all. Easy for readability.
>
>A little more detail in the changelog might be useful to those of us who
>are lazy about reading bash script....
>
More "unnecessary" words doesn't make the actual purpose of the scripts
more helpful. I believe the single line I put is good enough for the
people to capture the essence.
>Looks like this just prompts for each individual delete?  Actually it
>looks like it requires the user to enter the module path and kernel
>version for each one which makes it not much more convenient use than a
>bare "ls" and "rm".
>
No , it is not. You missed out the point. The user should be reminded
what they are upto and precisely what is needed. I don't care who the
user are. This is operation just can not be done airy-fairy way.
>I personally use this in unattended scripts.  I mean, I don't really
>care what we do with this, as I use my own copy of the script, so
>whatever's useful to more people is fine.
>
Yes, you wrote it for your convenience, and that's great. I am thinking
of putting broader user base, so the verbosity and explicitness.
>But if somebody does actually use it as-is, it'd be nicer to keep the
>current behavior and add an option ("-i" or something) for the
>interactive behavior.
Subtle thing is not my cup of tea, honestly lack of bent of mind always
prevent me to doing that kind of thing.What you mention a flag would be
great and pretty trivial . But the whole point of having this script to
be "usable" lies somewhere else.
>
>--b.
>
Bruce, I am no way trying to demean or over riding your thought and
work. Just trying to make things work for everyone else. I just took it
your good work to extend it , certainly others could have done much
better if they stab on it,including you. No, doubt about it.

Thanks,
Bhaskar
>> 
>> Signed-off-by: Bhaskar Chowdhury <unixbhaskar@gmail.com>
>> ---
>>  scripts/prune-kernel | 86 ++++++++++++++++++++++++++++++++++++--------
>>  1 file changed, 72 insertions(+), 14 deletions(-)
>> 
>> diff --git a/scripts/prune-kernel b/scripts/prune-kernel
>> index e8aa940bc0a9..9d839a4e4539 100755
>> --- a/scripts/prune-kernel
>> +++ b/scripts/prune-kernel
>> @@ -5,17 +5,75 @@
>>  # 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 $f
>> -        fi
>> -done
>> +#for f in "$@"
>> +#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 $boot_dir
>> +	rm -If vmlinuz-$kernel_version System.map-$kernel_version config-$kernel_version
>> +}
>> +
>> +function remove_old_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 [[ $kernel_version == "" ]];then
>> +	exit 1
>> +else
>> +	remove_old_kernel
>> +fi
>> +
>> +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 [[ $modules_version == "" ]];then
>> +	printf "You have forgotten to give the modules dir to remove"
>> +else
>> +	remove_old_modules_dir
>> +fi
>> +
>> +printf "\n\n\n Removed kernel version:$kernel_version and associated modules:$modules_version ...Done \n"
>> +
>> +while :
>> + do
>> +    printf "\n\n Do you want to remove another?[YN]: %s"
>> +    read response
>> +       if [[ $response == "Y" ]];then
>> +	 printf "Please give another version to remove: %s"
>> +	 read kernel_version
>> +	 remove_old_kernel
>> +	 printf "Please give the full modules directory name to remove: %s"
>> +	 read modules_version
>> +	 remove_old_modules_dir
>> +	 printf "\n\n\n Removed kernel version:$kernel_version and associated modules:$modules_version ..Done \n\n"
>> +      elif [[ $response == "N" ]];then
>> +	 exit 1
>> +    fi
>> + done
>> --
>> 2.21.0

Patch
diff mbox series

diff --git a/scripts/prune-kernel b/scripts/prune-kernel
index e8aa940bc0a9..9d839a4e4539 100755
--- a/scripts/prune-kernel
+++ b/scripts/prune-kernel
@@ -5,17 +5,75 @@ 
 # 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 $f
-        fi
-done
+#for f in "$@"
+#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 $boot_dir
+	rm -If vmlinuz-$kernel_version System.map-$kernel_version config-$kernel_version
+}
+
+function remove_old_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 [[ $kernel_version == "" ]];then
+	exit 1
+else
+	remove_old_kernel
+fi
+
+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 [[ $modules_version == "" ]];then
+	printf "You have forgotten to give the modules dir to remove"
+else
+	remove_old_modules_dir
+fi
+
+printf "\n\n\n Removed kernel version:$kernel_version and associated modules:$modules_version ...Done \n"
+
+while :
+ do
+    printf "\n\n Do you want to remove another?[YN]: %s"
+    read response
+       if [[ $response == "Y" ]];then
+	 printf "Please give another version to remove: %s"
+	 read kernel_version
+	 remove_old_kernel
+	 printf "Please give the full modules directory name to remove: %s"
+	 read modules_version
+	 remove_old_modules_dir
+	 printf "\n\n\n Removed kernel version:$kernel_version and associated modules:$modules_version ..Done \n\n"
+      elif [[ $response == "N" ]];then
+	 exit 1
+    fi
+ done