Re: [PATCH] filesystem-cleanup: Automatically remove old libraries

["Peter Müller" <peter.mueller@ipfire.org>]

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Reviewed-by: Peter Müller <peter.mueller(a)ipfire.org>

> This script runs through /usr/lib and /lib and tries to find
> all libraries which are no longer being used and more and
> deletes them.
> 
> This will help us to free space on root partitions that
> are limited to 2GB.
> 
> However, the script does not cover 100% of the cases, so that
> some files still need to be deleted manually (e.g. boost with
> their weird versioning schema).
> 
> This script should be executed after a Core Update has been
> installed.
> 
> Fixes: #12270
> Signed-off-by: Michael Tremer <michael.tremer(a)ipfire.org>
> ---
>  config/rootfiles/common/aarch64/stage2 |  1 +
>  config/rootfiles/common/stage2         |  1 +
>  config/rootfiles/common/x86_64/stage2  |  1 +
>  src/scripts/filesystem-cleanup         | 76 ++++++++++++++++++++++++++
>  4 files changed, 79 insertions(+)
>  create mode 100644 src/scripts/filesystem-cleanup
> 
> diff --git a/config/rootfiles/common/aarch64/stage2 b/config/rootfiles/common/aarch64/stage2
> index 366ab2bb0..2d9a70f81 100644
> --- a/config/rootfiles/common/aarch64/stage2
> +++ b/config/rootfiles/common/aarch64/stage2
> @@ -92,6 +92,7 @@ usr/local/bin/backupiso
>  usr/local/bin/connscheduler
>  usr/local/bin/consort.sh
>  usr/local/bin/convert-ovpn
> +usr/local/bin/filesystem-cleanup
>  usr/local/bin/hddshutdown
>  usr/local/bin/ipsec-interfaces
>  usr/local/bin/makegraphs
> diff --git a/config/rootfiles/common/stage2 b/config/rootfiles/common/stage2
> index d9068415b..b0680914e 100644
> --- a/config/rootfiles/common/stage2
> +++ b/config/rootfiles/common/stage2
> @@ -91,6 +91,7 @@ usr/local/bin/backupiso
>  usr/local/bin/connscheduler
>  usr/local/bin/consort.sh
>  usr/local/bin/convert-ovpn
> +usr/local/bin/filesystem-cleanup
>  usr/local/bin/hddshutdown
>  usr/local/bin/ipsec-interfaces
>  usr/local/bin/makegraphs
> diff --git a/config/rootfiles/common/x86_64/stage2 b/config/rootfiles/common/x86_64/stage2
> index d90e3d70a..9d3334e69 100644
> --- a/config/rootfiles/common/x86_64/stage2
> +++ b/config/rootfiles/common/x86_64/stage2
> @@ -93,6 +93,7 @@ usr/local/bin/backupiso
>  usr/local/bin/connscheduler
>  usr/local/bin/consort.sh
>  usr/local/bin/convert-ovpn
> +usr/local/bin/filesystem-cleanup
>  usr/local/bin/hddshutdown
>  usr/local/bin/ipsec-interfaces
>  usr/local/bin/makegraphs
> diff --git a/src/scripts/filesystem-cleanup b/src/scripts/filesystem-cleanup
> new file mode 100644
> index 000000000..d4cdfe8d3
> --- /dev/null
> +++ b/src/scripts/filesystem-cleanup
> @@ -0,0 +1,76 @@
> +#!/bin/bash
> +############################################################################
> +#                                                                          #
> +# This file is part of the IPFire Firewall.                                #
> +#                                                                          #
> +# IPFire is free software; you can redistribute it and/or modify           #
> +# it under the terms of the GNU General Public License as published by     #
> +# the Free Software Foundation; either version 2 of the License, or        #
> +# (at your option) any later version.                                      #
> +#                                                                          #
> +# IPFire is distributed in the hope that it will be useful,                #
> +# but WITHOUT ANY WARRANTY; without even the implied warranty of           #
> +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the            #
> +# GNU General Public License for more details.                             #
> +#                                                                          #
> +# You should have received a copy of the GNU General Public License        #
> +# along with IPFire; if not, write to the Free Software                    #
> +# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA #
> +#                                                                          #
> +# Copyright (C) 2020 IPFire Team <info(a)ipfire.org>.                        #
> +#                                                                          #
> +############################################################################
> +
> +PATHS=(
> +	/usr/lib
> +	/lib
> +)
> +
> +main() {
> +	# Update the runtime linker cache (this may fix any broken symlinks)
> +	ldconfig
> +
> +	local path
> +	for path in ${PATHS[@]}; do
> +		echo "Searching in ${path}..."
> +
> +		# Find all files called libsomething.so.N
> +		local lib
> +		for lib in $(find "${path}" -maxdepth 1 -type l -name "lib*.so.*" | sort); do
> +			# Read the name of the linked library
> +			local link="$(readlink -m "${lib}")"
> +
> +			# We have two versioning schemas that we need to distinguish...
> +			local files=()
> +			case "${link}" in
> +				# Libraries called libsomething-N.so
> +				*/lib*-*.so)
> +					files+=( ${link%-*}-* )
> +					;;
> +
> +				# Libraries called libsomething.so.N.*
> +				*)
> +					files+=( ${lib}* )
> +					;;
> +			esac
> +
> +			# Remove all files that have the same base name than
> +			# the library we are looking at, apart from the symlink
> +			# and the linked file itself.
> +			local file
> +			for file in ${files[@]}; do
> +				case "${file}" in
> +					# Ignore these files
> +					${lib}|${link})
> +						;;
> +
> +					*)
> +						unlink "${file}"
> +						;;
> +				esac
> +			done
> +		done
> +	done
> +}
> +
> +main "$@" || exit $?
>