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#!/bin/sh
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# Copyright (c) 2010, 2011 George Danchev <danchev@spnet.net>
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# Copyright (c) 2010, 2011 Thomas Schmitt <scdbackup@gmx.net>
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# Copyright (c) 2010, 2011, 2019 Thomas Schmitt <scdbackup@gmx.net>
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# This script is distributed according to the terms of the GNU GPL v2.
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# This should be better rewritten in C at some future point. Ref: pwd code.
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# Create a list of MD5sums encoded in hexadecimal format and print to standard output
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# Create a list of checksums encoded in hexadecimal format and print to
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# standard output. Checksum may be MD5 or SHA256.
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# Format Description
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# A line in the emerging file is to be composed as follows:
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#
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# The MD5 checksum of the file content must be encoded in 32 hex digits
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# The checksum of the file content must be encoded in the aprropriate number
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# of hex digits.
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# [0-9afAF]
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#
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# Next come two blanks.
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@ -37,35 +39,61 @@
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# text, like "Debian:".
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# A simple strategy to cope with this is to write absolute paths into the
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# .md5 file, and to use matching absolute paths in the -jigdo-map
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# checksum file, and to use matching absolute paths in the -jigdo-map
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# directives. Keep in mind that mapping is purely literal. Symbolic links
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# are neither resolved nor can they confuse the mapping.
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set -e
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SELF=jigdo-gen-md5-list
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VER=0.2
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VER=0.3
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OPT_ABSOLUTE=1
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# The checksum type to produce: md5 , sha256
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checksum_type=md5
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hex_length=32
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md5_cmd=
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# On FreeBSD there is "md5" rather than "md5sum".
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# Furthermore, the FreeBSD shell reports missing commands to inherited stderr,
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# regardless that the attempt itself has redirected stderr. Thus a sub shell
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# is needed to hide the protest.
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if ( md5sum --help ) >/dev/null 2>&1
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then
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md5_cmd=md5sum
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elif ( md5 -s test ) >/dev/null 2>&1
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then
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md5_cmd=md5
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else
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echo "$0 : Programs md5sum and md5 failed to work" >&2
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exit 2
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fi
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choose_checksum_cmd() {
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if test "$checksum_type" = "md5"
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then
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if ( md5sum --help ) >/dev/null 2>&1
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then
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md5_cmd=md5sum
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elif ( md5 -s test ) >/dev/null 2>&1
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then
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md5_cmd=md5
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else
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echo "$0 : Programs md5sum and md5 failed to work" >&2
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exit 2
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fi
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elif test "$checksum_type" = "sha256"
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then
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if ( sha256sum --help ) >/dev/null 2>&1
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then
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md5_cmd=sha256sum
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elif ( sha256 -s test ) >/dev/null 2>&1
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then
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md5_cmd=sha256
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else
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echo "$0 : Programs sha256sum and sha256 failed to work" >&2
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exit 2
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fi
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fi
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}
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usage() {
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cat << USAGE
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usage: $SELF [option] DIR FILE ...
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Print a Jigdo checksum file to stdout. One line per FILE and per file in DIR.
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-m, --md5 produce MD5 checksums (default)
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-s, --sha256 produce SHA256 checksums
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-a, --make-absolute make absolute paths, avoiding any symlinks (default)
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-l, --keep-literal leave paths untouched, literally as supplied
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-v, --version print version
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@ -100,12 +128,18 @@ md5list() {
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elif test "$md5_cmd" = "md5"
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then
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MD5=`md5 -q "$item"`
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elif test "$md5_cmd" = "sha256sum"
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then
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MD5=`sha256sum "$item" | awk '{print $1}'`
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elif test "$md5_cmd" = "sha256"
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then
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MD5=`sha256 -q "$item"`
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else
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echo "$0 : No MD5 program found" >&2
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echo "$0 : Internal error : Checksum mode unknown : $md5_cmd" >&2
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exit 2
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fi
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SIZ=`ls -ld "$item" | awk '{print $5}'`
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printf '%32s %12s %s\n' "$MD5" "$SIZ" "$item"
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printf '%'"$hex_length"'s %12s %s\n' "$MD5" "$SIZ" "$item"
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}
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walkdir() {
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@ -123,7 +157,17 @@ if test "$1" = "" ; then
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exit 1
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fi
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case "$1" in
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for i in "$@"
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do
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case "$i" in
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--md5|-m)
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checksum_type=md5
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hex_length=32
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;;
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--sha256|-s)
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checksum_type=sha256
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hex_length=64
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;;
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--make-absolute|-a)
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OPT_ABSOLUTE=1;
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shift;
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@ -147,12 +191,15 @@ case "$1" in
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# usage
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# exit 1
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# ;;
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esac
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esac
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done
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choose_checksum_cmd
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for i in "$@"
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do
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if test -d "$i" ; then
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if echo "$i" | grep '^-' >/dev/null ; then
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dummy=dummy
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elif test -d "$i" ; then
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DR="$i"
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if test $OPT_ABSOLUTE -eq 1; then
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od=`pwd -P` # old dir
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