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69 lines
1.9 KiB
69 lines
1.9 KiB
3 years ago
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#!/bin/bash
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#
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# Tool to dump info from a singularity image
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# Run this as "root" from _inside_ the container image,
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# because it will interrogate the system using the image's
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# contained files.
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#
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# This is for Debian-based image
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#
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# Usage:
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# simg-dump-info.sh INFO_DIR CONT_NAME [IMAGE_ROOT_DIR]
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#
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# INFO_DIR is the location to dump the info files
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# CONT_NAME is the name of the container (to be used as the basenames)
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#
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# Info dumped so far:
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# - ${CONT_NAME}.files - actual list of files
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# - ${CONT_NAME}.files-dpkg - registration of files according to dpkg
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# - ${CONT_NAME}.lists-dpkg.tar - registration of files according to dpkg
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# (individual list files)
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# - ${CONT_NAME}.dpkg-l - list of installed packages
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_simg_list_all_files () {
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local ROOT_DIR="${1:-.}"
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find "$ROOT_DIR" -mount \
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| sort \
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| awk -v ROOT="$ROOT_DIR" '
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BEGIN {
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ROOTX = ROOT
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gsub(/\/+$/, "", ROOTX)
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ROOTX = (ROOTX "/")
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len_ROOTX = length(ROOTX)
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}
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$0 == ROOT { next }
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(substr($0, 1, len_ROOTX) == ROOTX) {
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print(substr($0, len_ROOTX))
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next
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}
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'
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}
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set -e
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MYSELF=$0
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MYDIR=$(dirname "$MYSELF")
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INFO_DIR=${1:?INFO_DIR required as arg 1}
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CONT_NAME=${2:?CONT_NAME required as arg 2}
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CONT_IMAGE_ROOT_DIR=${3:-/}
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# Get the view of the files *ACTUALLY* residing in the container
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_simg_list_all_files "${CONT_IMAGE_ROOT_DIR}" > "${INFO_DIR}/${CONT_NAME}.files"
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dpkg -l > "${INFO_DIR}/${CONT_NAME}.dpkg-l"
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# Get the view of files registered to dpkg
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# (In some containers the files do not exist there because they
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# were somehow deleted, e.g. doc files, man pages, ...)
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(
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cd /var/lib/dpkg/info
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tar cf "${INFO_DIR}/${CONT_NAME}.lists-dpkg.tar" *.list
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cat *.list | sort | uniq > "${INFO_DIR}/${CONT_NAME}.dpkg-files"
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)
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