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Dir : ~/snap/core22/current/usr/share/glib-2.0/

Edit File: clean-up-unmanaged-libraries

#!/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: