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#!/bin/dash # (This script requires either dash or bash due to its use of test -ef.) # Copyright 2020 Collabora Ltd. # SPDX-License-Identifier: MIT # (see "Expat" paragraph in debian/copyright) set -eu # global bug_ref=911225 force= me="$0" need_ldconfig= really=yes verbose= debug () { [ -z "$verbose" ] || echo "DEBUG: $me: $*" >&2 } warning () { echo "WARNING: $me: $*" >&2 } usage () { local status="${1:-2}" if [ "$status" -gt 0 ]; then exec >&2 fi cat <<EOF Usage: $me [OPTIONS] MULTIARCH SONAME... Clean up unmanaged copies of SONAME that might still exist in /lib/MULTIARCH after upgrading to a version that is in /usr/lib/MULTIARCH. On non-merged-/usr systems, because /lib/MULTIARCH is higher-precedence than /usr/lib/MULTIARCH, that can result in the old version continuing to be used, breaking versioned dependencies. See #911225, #949395 and related bugs. Options: --bug-ref=BUG Mention BUG in log messages --dry-run Don't remove the files, just report --force Run even if the system is merged-/usr --verbose Be more verbose EOF exit "$status" } do_soname () { local multiarch="$1" local soname="$2" local impl local owner local removal="/lib/$multiarch/removed-by-upgrade-bug$bug_ref" local found_one= # We had better not remove the only copy of $soname. This script is # for the situation where it moved from /lib/MULTIARCH/SONAME to # /usr/lib/MULTIARCH/SONAME, so fail in all other cases. if ! [ -e "/usr/lib/$multiarch/$soname" ]; then warning "/usr/lib/$multiarch/$soname does not exist" return 1 fi # Safety-catch against problems with dpkg-query: if no package is said # to own the new version of the library, fail early. if owner=$(dpkg-query -S "/usr/lib/$multiarch/$soname"); then owner="${owner%%:*}" debug "/usr/lib/$multiarch/$soname is owned by $owner" else warning "/usr/lib/$multiarch/$soname is not owned by a package?" return 1 fi for impl in "/lib/$multiarch/$soname".*; do if ! [ -e "$impl" ]; then continue fi found_one=yes if owner=$(dpkg-query -S "$impl"); then owner="${owner%%:*}" warning "$impl is owned by $owner, not deleting" continue fi if [ "/usr$impl" -ef "$impl" ] && owner=$(dpkg-query -S "/usr$impl"); then owner="${owner%%:*}" warning "/usr$impl is owned by $owner, not deleting" continue fi warning "$impl is not owned by any package" warning "Related files:" ls -il \ "/lib/$multiarch/$soname" \ "/lib/$multiarch/$soname".* \ "/usr/lib/$multiarch/$soname" \ "/usr/lib/$multiarch/$soname".* \ >&2 || : if [ -n "$really" ]; then warning "Moving $impl into $removal" install -d "$removal" rm -f "$removal/${impl##*/}" mv "$impl" "$removal/." else warning "Not moving $impl into $removal (--dry-run)" fi echo >&2 need_ldconfig=yes done if [ -z "$found_one" ]; then debug "No stray files found at /lib/$multiarch/$soname.*" fi } main () { local getopt_temp local multiarch local soname getopt_temp="help" getopt_temp="$getopt_temp,bug-ref:" getopt_temp="$getopt_temp,dry-run" getopt_temp="$getopt_temp,force" getopt_temp="$getopt_temp,verbose" getopt_temp="$(getopt -o '' --long "$getopt_temp" -n "$me" -- "$@")" eval "set -- $getopt_temp" while [ "$#" -gt 0 ] do case "$1" in (--dry-run) really= verbose=yes shift ;; (--bug-ref) bug_ref="$2" shift 2 ;; (--force) force=yes shift ;; (--help) usage 0 ;; (--verbose) verbose=yes shift ;; (--) shift break ;; (-*) warning "Unknown option: $1" usage 2 ;; (*) break ;; esac done if [ "$#" -lt 2 ]; then warning "A multiarch tuple and at least one SONAME are required" usage 2 fi multiarch="$1" shift if [ -n "$force" ]; then debug "Using force" elif [ "/usr/lib/$multiarch" -ef "/lib/$multiarch" ]; then # On a merged-/usr system, a new library like libglib-2.0.so.0.5000.0 # will take precedence over a stale library like # libglib-2.0.so.0.4200.0 in the same directory without us needing # to do anything, so the safe route is to avoid doing anything. debug "Merged-/usr system, no need to do anything without --force" return 0 fi for soname in "$@"; do do_soname "$multiarch" "$soname" done if [ -n "$need_ldconfig" ] && [ -n "$really" ]; then warning "Changes were made, running ldconfig..." ldconfig || ldconfig --verbose elif [ -n "$need_ldconfig" ]; then debug "Would run ldconfig, but skipped due to --dry-run" fi } main "$@" # vim:set sw=4 sts=4 et:
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