Hi Alex,
> I happen to agree with the FSF that programs should not change their
> behaviour because their name has been changed, but that's just personal
> preference. I think there should be an override option that selects the
> digest independently of the executable name, at least.
Fine, done. Would you please try this and tell me what do change? And
another thing, what is the practical difference between --binary and
--text options?
# EOF
#!/bin/bash
#
# Mimics {md5,sha1}sum coreutils' apps using openssl.
#
# 2006-09-17 Mordae <[EMAIL PROTECTED]>
# * Added options --digest and -d for digest selection.
#
# File separator
sep=$(echo -ne '\a')
# Collected files (separated by ${sep})
files=''
action='sum'
quiet='false'
selDigest=''
while [ $# -gt 0 ]; do
case "${1}" in
(--*)
case "${1#??}" in
(check) action='check' ;;
(status) quiet='true' ;;
(help) action='help' ;;
(version) action='version' ;;
(digest)
selDigest=${2}
shift
;;
(binary|text|warn)
echo "${0}: ignored -- ${1}" >&2
;;
(*)
echo "${0}: unknown option -- ${1}" >&2
;;
esac
;;
(-*)
for opt in $(echo "${1#?}" | sed 's#.#\0 #g'); do
case "${opt}" in
(w|b|t)
echo "${0} ignored: -${opt}" >&2
;;
(d)
selDigest=${2}
shift
;;
(c) action='check' ;;
esac
done
;;
(*)
files="${files}${sep}${1}"
;;
esac
shift
done
if [ -z "${files}" ]; then
files='-'
fi
me=${0##*/}
digest=${me%sum}
openssl_sum ( )
{
if [ x"${1}" = x'-' ]; then
openssl dgst "-${digest}" || return 1
else
openssl dgst "-${digest}" <"${1}" || return 1
fi
}
do_sum ( )
{
echo "$(openssl_sum "${1}") ${1}"
}
check ( )
{
curr_sum=$(openssl_sum "${1}")
if [ x"${curr_sum}" = x"${2}" ]; then
return 0
fi
return 1
}
do_check ( )
{
local sum=''
local res=0
exec 9< "${1}"
while read line <&9; do
sum=${line%% *}
file=${line#* }
[[ "${sum}" =~ '\*$' ]] && sum=${sum%?}
(( check_count++ ))
if check "${file}" "${sum}"; then
echo "${file}: OK"
else
echo "${file}: FAILED"
(( check_failed++ ))
res=1
fi
done
exec 9<&-
return ${res}
}
case "${action}" in
(sum|check)
[ -n "${selDigest}" ] && digest=${selDigest}
res=0
check_count=0
check_failed=0
IFS=${sep}
for file in ${files}; do
[ -z "${file}" ] && continue
[ x"${file}" = x'-' -o -f "${file}" ] || {
echo "${0}: ${file}: No such file or directory"
>&2
res=1
continue
}
if [ "${action}" = 'sum' ]; then
do_sum "${file}"
else
do_check "${file}" || res=$?
fi
done
if [ ${check_failed} -gt 0 ]; then
echo "${0}: WARNING: ${check_failed} of ${check_count}
computed checksum did NOT match" >&2
fi
exit ${res}
;;
(help)
cat <<EOT
Usage: ${me} [OPTION] [FILE]...
Print or check ${digest} checksums using openssl.
With no FILE, or when FILE is -, read standard input.
-c, --check read ${digest} sums from the FILEs and check them
Following options are specific to this particular script and are not supported
by original md5sum and sha1sum executables:
--digest, -d Selects digest to use, \`use openssl dgst --help\`
to get list of all suported digests.
This defaults to ${digest} for this name (${me}).
The following two options are useful only when verifying checksums:
--status don't output anything, status code shows success
--help display this help and exit
--version output version information and exit
The default mode is to print a line with checksum, a character indicating type
(\`*' for binary, \` ' for text), and name for each FILE, this script however
always uses text mode.
Report bugs to <[email protected]> or as a ticket on
<http://wiki.linuxfromscratch.org/hlfs/report>
EOT
;;
(version)
cat <<EOT
md5sum (HLFS) 1.20060917
Written by Jan Dvorak for HLFS project.
You may redistribute copies of this script under the terms of
the GNU General Public License <http://www.gnu.org/licenses/gpl.html>.
EOT
;;
esac
# EOF
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