1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2017 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
import (
"bytes"
"sort"
"github.com/snapcore/snapd/interfaces"
"github.com/snapcore/snapd/snap"
)
// Specification keeps all the dbus snippets.
type Specification struct {
// Snippets are indexed by security tag.
appSet *interfaces.SnapAppSet
snippets map[string][]string
securityTags []string
}
func NewSpecification(appSet *interfaces.SnapAppSet) *Specification {
return &Specification{appSet: appSet}
}
func (spec *Specification) SnapAppSet() *interfaces.SnapAppSet {
return spec.appSet
}
// AddSnippet adds a new dbus snippet.
func (spec *Specification) AddSnippet(snippet string) {
if len(spec.securityTags) == 0 {
return
}
if spec.snippets == nil {
spec.snippets = make(map[string][]string)
}
for _, tag := range spec.securityTags {
spec.snippets[tag] = append(spec.snippets[tag], snippet)
}
}
// Snippets returns a deep copy of all the added snippets.
func (spec *Specification) Snippets() map[string][]string {
result := make(map[string][]string, len(spec.snippets))
for k, v := range spec.snippets {
result[k] = append([]string(nil), v...)
}
return result
}
// SnippetForTag returns a combined snippet for given security tag with individual snippets
// joined with newline character. Empty string is returned for non-existing security tag.
func (spec *Specification) SnippetForTag(tag string) string {
var buffer bytes.Buffer
for _, snippet := range spec.snippets[tag] {
buffer.WriteString(snippet)
buffer.WriteRune('\n')
}
return buffer.String()
}
// SecurityTags returns a list of security tags which have a snippet.
func (spec *Specification) SecurityTags() []string {
var tags []string
for t := range spec.snippets {
tags = append(tags, t)
}
sort.Strings(tags)
return tags
}
// Implementation of methods required by interfaces.Specification
// AddConnectedPlug records dbus-specific side-effects of having a connected plug.
func (spec *Specification) AddConnectedPlug(iface interfaces.Interface, plug *interfaces.ConnectedPlug, slot *interfaces.ConnectedSlot) error {
type definer interface {
DBusConnectedPlug(spec *Specification, plug *interfaces.ConnectedPlug, slot *interfaces.ConnectedSlot) error
}
if iface, ok := iface.(definer); ok {
tags, err := spec.appSet.SecurityTagsForConnectedPlug(plug)
if err != nil {
return err
}
spec.securityTags = tags
defer func() { spec.securityTags = nil }()
return iface.DBusConnectedPlug(spec, plug, slot)
}
return nil
}
// AddConnectedSlot records dbus-specific side-effects of having a connected slot.
func (spec *Specification) AddConnectedSlot(iface interfaces.Interface, plug *interfaces.ConnectedPlug, slot *interfaces.ConnectedSlot) error {
type definer interface {
DBusConnectedSlot(spec *Specification, plug *interfaces.ConnectedPlug, slot *interfaces.ConnectedSlot) error
}
if iface, ok := iface.(definer); ok {
tags, err := spec.appSet.SecurityTagsForConnectedSlot(slot)
if err != nil {
return err
}
spec.securityTags = tags
defer func() { spec.securityTags = nil }()
return iface.DBusConnectedSlot(spec, plug, slot)
}
return nil
}
// AddPermanentPlug records dbus-specific side-effects of having a plug.
func (spec *Specification) AddPermanentPlug(iface interfaces.Interface, plug *snap.PlugInfo) error {
type definer interface {
DBusPermanentPlug(spec *Specification, plug *snap.PlugInfo) error
}
if iface, ok := iface.(definer); ok {
tags, err := spec.appSet.SecurityTagsForPlug(plug)
if err != nil {
return err
}
spec.securityTags = tags
defer func() { spec.securityTags = nil }()
return iface.DBusPermanentPlug(spec, plug)
}
return nil
}
// AddPermanentSlot records dbus-specific side-effects of having a slot.
func (spec *Specification) AddPermanentSlot(iface interfaces.Interface, slot *snap.SlotInfo) error {
type definer interface {
DBusPermanentSlot(spec *Specification, slot *snap.SlotInfo) error
}
if iface, ok := iface.(definer); ok {
tags, err := spec.appSet.SecurityTagsForSlot(slot)
if err != nil {
return err
}
spec.securityTags = tags
defer func() { spec.securityTags = nil }()
return iface.DBusPermanentSlot(spec, slot)
}
return nil
}
|
