Browse code
Add keytab-editor.
keytab-editor is a script that combines yamltab and the default text editor to
offer seamless edition of keytab files.
Xavier G authored on26/04/2020 21:40:28 Showing1 changed files
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+#!/usr/bin/env bash |
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+ |
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+# Copyright © 2020 Xavier G. <xavier.yamltab@kindwolf.org> |
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+# This work is free. You can redistribute it and/or modify it under the |
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+# terms of the Do What The Fuck You Want To Public License, Version 2, |
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+# as published by Sam Hocevar. See the COPYING file for more details. |
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+ |
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+# Helper variables: |
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+yamltab="${YAMLTAB_PATH:-yamltab}"
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+ |
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+# Helper functions: |
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+function edit {
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+ if `which editor > /dev/null`; then |
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+ editor "$@" |
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+ else |
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+ "${EDITOR:-vi}" "$@"
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+ fi |
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+} |
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+ |
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+function cleanup {
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+ [ -f "${tmp_file}" ] && unlink "${tmp_file}"
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+ [ -f "${tmp_file}.yaml" ] && unlink "${tmp_file}.yaml"
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+ [ -d "${tmp_dir}" ] && rmdir "${tmp_dir}"
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+} |
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+ |
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+function exit {
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+ cleanup |
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+ builtin exit $1 |
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+} |
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+ |
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+# Expect a keytab file as single argument: |
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+keytab="${1:?Usage: $0 keytab}"
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+keytab_filename="$(basename "${keytab}")"
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+ |
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+# Redundant with the chmod below; might compensate for some whacky editors? |
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+umask 0077 |
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+ |
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+# Prepare temporary files: |
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+tmp_dir="$(mktemp --directory)" || exit $? |
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+tmp_file="${tmp_dir}/${keytab_filename}"
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+touch "${tmp_file}" "${tmp_file}.yaml" || exit $?
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+chmod go-rwx "${tmp_file}" "${tmp_file}.yaml" || exit $?
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+ |
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+# Dump the given keytab as YAML: |
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+"${yamltab}" "${keytab}" > "${tmp_file}.yaml" || exit $?
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+md5_before="$(md5sum "${tmp_file}.yaml")"
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+ |
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+# Edit the keytab as YAML: |
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+edit "${tmp_file}.yaml"
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+rc=$? |
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+ |
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+# If the YAML dump was not modified, leave the keytab untouched: |
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+md5_after="$(md5sum "${tmp_file}.yaml")"
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+if [ "${md5_before}" == "${md5_after}" ]; then
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+ echo "No changes detected, ${keytab} left untouched."
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+ exit 0 |
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+else |
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+ # Convert the YAML into a binary keytab: |
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+ "${yamltab}" "${tmp_file}.yaml" > "${tmp_file}" || exit $?
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+ # Replace the old keytab with the new one: |
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+ cat "${tmp_file}" > "${keytab}" || exit $?
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+fi |
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+exit $rc |