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
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
// Copyright 2017 Northern.tech AS
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package handlers
import (
"archive/tar"
"bytes"
"compress/gzip"
"io"
"io/ioutil"
"os"
"path/filepath"
"github.com/mendersoftware/mender-artifact/artifact"
"github.com/pkg/errors"
)
// Rootfs handles updates of type 'rootfs-image'.
type Rootfs struct {
version int
update *DataFile
InstallHandler func(io.Reader, *DataFile) error
}
func NewRootfsV1(updFile string) *Rootfs {
uf := &DataFile{
Name: updFile,
}
return &Rootfs{
update: uf,
version: 1,
}
}
func NewRootfsV2(updFile string) *Rootfs {
uf := &DataFile{
Name: updFile,
}
return &Rootfs{
update: uf,
version: 2,
}
}
// NewRootfsInstaller is used by the artifact reader to read and install
// rootfs-image update type.
func NewRootfsInstaller() *Rootfs {
return &Rootfs{
update: new(DataFile),
}
}
// Copy creates a new instance of Rootfs handler from the existing one.
func (rp *Rootfs) Copy() Installer {
return &Rootfs{
version: rp.version,
update: new(DataFile),
InstallHandler: rp.InstallHandler,
}
}
func (rp *Rootfs) ReadHeader(r io.Reader, path string) error {
switch {
case filepath.Base(path) == "files":
files, err := parseFiles(r)
if err != nil {
return err
}
rp.update.Name = files.FileList[0]
case filepath.Base(path) == "type-info",
filepath.Base(path) == "meta-data",
match(artifact.HeaderDirectory+"/*/signatures/*", path),
match(artifact.HeaderDirectory+"/*/scripts/*/*", path):
// TODO: implement when needed
case match(artifact.HeaderDirectory+"/*/checksums/*", path):
buf := bytes.NewBuffer(nil)
if _, err := io.Copy(buf, r); err != nil {
return errors.Wrap(err, "update: error reading checksum")
}
rp.update.Checksum = buf.Bytes()
default:
return errors.Errorf("update: unsupported file: %v", path)
}
return nil
}
func (rfs *Rootfs) Install(r io.Reader, info *os.FileInfo) error {
if rfs.InstallHandler != nil {
if err := rfs.InstallHandler(r, rfs.update); err != nil {
return errors.Wrap(err, "update: can not install")
}
}
return nil
}
func (rfs *Rootfs) GetUpdateFiles() [](*DataFile) {
return [](*DataFile){rfs.update}
}
func (rfs *Rootfs) GetType() string {
return "rootfs-image"
}
func (rfs *Rootfs) ComposeHeader(tw *tar.Writer, no int) error {
path := artifact.UpdateHeaderPath(no)
// first store files
if err := writeFiles(tw, []string{filepath.Base(rfs.update.Name)},
path); err != nil {
return err
}
// store type-info
if err := writeTypeInfo(tw, "rootfs-image", path); err != nil {
return err
}
// store empty meta-data
// the file needs to be a part of artifact even if this one is empty
sw := artifact.NewTarWriterStream(tw)
if err := sw.Write(nil, filepath.Join(path, "meta-data")); err != nil {
return errors.Wrap(err, "update: can not store meta-data")
}
if rfs.version == 1 {
// store checksums
if err := writeChecksums(tw, [](*DataFile){rfs.update},
filepath.Join(path, "checksums")); err != nil {
return err
}
}
return nil
}
func (rfs *Rootfs) ComposeData(tw *tar.Writer, no int) error {
f, ferr := ioutil.TempFile("", "data")
if ferr != nil {
return errors.New("update: can not create temporary data file")
}
defer os.Remove(f.Name())
err := func() error {
gz := gzip.NewWriter(f)
defer gz.Close()
tarw := tar.NewWriter(gz)
defer tarw.Close()
df, err := os.Open(rfs.update.Name)
if err != nil {
return errors.Wrapf(err, "update: can not open data file: %v", rfs.update)
}
defer df.Close()
fw := artifact.NewTarWriterFile(tarw)
if err := fw.Write(df, filepath.Base(rfs.update.Name)); err != nil {
return errors.Wrapf(err,
"update: can not write tar temp data header: %v", rfs.update)
}
return nil
}()
if err != nil {
return err
}
if _, err = f.Seek(0, 0); err != nil {
return errors.Wrapf(err, "update: can not read data file: %v", rfs.update)
}
dfw := artifact.NewTarWriterFile(tw)
if err = dfw.Write(f, artifact.UpdateDataPath(no)); err != nil {
return errors.Wrapf(err, "update: can not write tar data header: %v", rfs.update)
}
return nil
}
|
