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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2016 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
// Package dbus implements interaction between snappy and dbus.
//
// Snappy creates dbus configuration files that describe how various
// services on the system bus can communicate with other peers.
//
// Each configuration is an XML file containing <busconfig>...</busconfig>.
// Particular security snippets define whole <policy>...</policy> entires.
//
// NOTE: This interacts with systemd.
// TODO: Explain how this works (security).
package dbus
import (
"bytes"
"fmt"
"strings"
)
// SafePath returns a string suitable for use in a DBus object
func SafePath(s string) string {
const allowed = `abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789`
buf := bytes.NewBuffer(make([]byte, 0, len(s)))
for _, c := range []byte(s) {
if strings.IndexByte(allowed, c) >= 0 {
fmt.Fprintf(buf, "%c", c)
} else {
fmt.Fprintf(buf, "_%02x", c)
}
}
return buf.String()
}
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