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
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
|
package main
import (
"fmt"
"os"
"path/filepath"
"strings"
"github.com/containers/buildah/pkg/chrootuser"
"github.com/containers/buildah/util"
"github.com/containers/libpod/cmd/podman/cliconfig"
"github.com/containers/libpod/cmd/podman/libpodruntime"
"github.com/containers/libpod/libpod"
"github.com/containers/storage"
"github.com/containers/storage/pkg/archive"
"github.com/containers/storage/pkg/chrootarchive"
"github.com/containers/storage/pkg/idtools"
digest "github.com/opencontainers/go-digest"
specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"github.com/spf13/cobra"
)
var (
cpCommand cliconfig.CpValues
cpDescription = `Command copies the contents of SRC_PATH to the DEST_PATH.
You can copy from the container's file system to the local machine or the reverse, from the local filesystem to the container. If "-" is specified for either the SRC_PATH or DEST_PATH, you can also stream a tar archive from STDIN or to STDOUT. The CONTAINER can be a running or stopped container. The SRC_PATH or DEST_PATH can be a file or directory.
`
_cpCommand = &cobra.Command{
Use: "cp [flags] SRC_PATH DEST_PATH",
Short: "Copy files/folders between a container and the local filesystem",
Long: cpDescription,
RunE: func(cmd *cobra.Command, args []string) error {
cpCommand.InputArgs = args
cpCommand.GlobalFlags = MainGlobalOpts
cpCommand.Remote = remoteclient
return cpCmd(&cpCommand)
},
Example: "[CONTAINER:]SRC_PATH [CONTAINER:]DEST_PATH",
}
)
func init() {
cpCommand.Command = _cpCommand
flags := cpCommand.Flags()
flags.BoolVar(&cpCommand.Extract, "extract", false, "Extract the tar file into the destination directory.")
cpCommand.SetHelpTemplate(HelpTemplate())
cpCommand.SetUsageTemplate(UsageTemplate())
rootCmd.AddCommand(cpCommand.Command)
}
func cpCmd(c *cliconfig.CpValues) error {
args := c.InputArgs
if len(args) != 2 {
return errors.Errorf("you must provide a source path and a destination path")
}
runtime, err := libpodruntime.GetRuntime(&c.PodmanCommand)
if err != nil {
return errors.Wrapf(err, "could not get runtime")
}
defer runtime.Shutdown(false)
extract := c.Flag("extract").Changed
return copyBetweenHostAndContainer(runtime, args[0], args[1], extract)
}
func copyBetweenHostAndContainer(runtime *libpod.Runtime, src string, dest string, extract bool) error {
srcCtr, srcPath := parsePath(runtime, src)
destCtr, destPath := parsePath(runtime, dest)
if (srcCtr == nil && destCtr == nil) || (srcCtr != nil && destCtr != nil) {
return errors.Errorf("invalid arguments %s, %s you must use just one container", src, dest)
}
if len(srcPath) == 0 || len(destPath) == 0 {
return errors.Errorf("invalid arguments %s, %s you must specify paths", src, dest)
}
ctr := srcCtr
isFromHostToCtr := (ctr == nil)
if isFromHostToCtr {
ctr = destCtr
}
mountPoint, err := ctr.Mount()
if err != nil {
return err
}
defer ctr.Unmount(false)
user, err := getUser(mountPoint, ctr.User())
if err != nil {
return err
}
idMappingOpts, err := ctr.IDMappings()
if err != nil {
return errors.Wrapf(err, "error getting IDMappingOptions")
}
containerOwner := idtools.IDPair{UID: int(user.UID), GID: int(user.GID)}
hostUID, hostGID, err := util.GetHostIDs(convertIDMap(idMappingOpts.UIDMap), convertIDMap(idMappingOpts.GIDMap), user.UID, user.GID)
if err != nil {
return err
}
hostOwner := idtools.IDPair{UID: int(hostUID), GID: int(hostGID)}
var glob []string
if isFromHostToCtr {
if filepath.IsAbs(destPath) {
destPath = filepath.Join(mountPoint, destPath)
} else {
if err = idtools.MkdirAllAndChownNew(filepath.Join(mountPoint, ctr.WorkingDir()), 0755, hostOwner); err != nil {
return errors.Wrapf(err, "error creating directory %q", destPath)
}
destPath = filepath.Join(mountPoint, ctr.WorkingDir(), destPath)
}
} else {
if filepath.IsAbs(srcPath) {
srcPath = filepath.Join(mountPoint, srcPath)
} else {
srcPath = filepath.Join(mountPoint, ctr.WorkingDir(), srcPath)
}
}
glob, err = filepath.Glob(srcPath)
if err != nil {
return errors.Wrapf(err, "invalid glob %q", srcPath)
}
if len(glob) == 0 {
glob = append(glob, srcPath)
}
if !filepath.IsAbs(destPath) {
dir, err := os.Getwd()
if err != nil {
return errors.Wrapf(err, "err getting current working directory")
}
destPath = filepath.Join(dir, destPath)
}
var lastError error
for _, src := range glob {
err := copy(src, destPath, dest, idMappingOpts, &containerOwner, extract)
if lastError != nil {
logrus.Error(lastError)
}
lastError = err
}
return lastError
}
func getUser(mountPoint string, userspec string) (specs.User, error) {
uid, gid, err := chrootuser.GetUser(mountPoint, userspec)
u := specs.User{
UID: uid,
GID: gid,
Username: userspec,
}
if !strings.Contains(userspec, ":") {
groups, err2 := chrootuser.GetAdditionalGroupsForUser(mountPoint, uint64(u.UID))
if err2 != nil {
if errors.Cause(err2) != chrootuser.ErrNoSuchUser && err == nil {
err = err2
}
} else {
u.AdditionalGids = groups
}
}
return u, err
}
func parsePath(runtime *libpod.Runtime, path string) (*libpod.Container, string) {
pathArr := strings.SplitN(path, ":", 2)
if len(pathArr) == 2 {
ctr, err := runtime.LookupContainer(pathArr[0])
if err == nil {
return ctr, pathArr[1]
}
}
return nil, path
}
func getPathInfo(path string) (string, os.FileInfo, error) {
path, err := filepath.EvalSymlinks(path)
if err != nil {
return "", nil, errors.Wrapf(err, "error evaluating symlinks %q", path)
}
srcfi, err := os.Stat(path)
if err != nil {
return "", nil, errors.Wrapf(err, "error reading path %q", path)
}
return path, srcfi, nil
}
func copy(src, destPath, dest string, idMappingOpts storage.IDMappingOptions, chownOpts *idtools.IDPair, extract bool) error {
srcPath, err := filepath.EvalSymlinks(src)
if err != nil {
return errors.Wrapf(err, "error evaluating symlinks %q", srcPath)
}
srcPath, srcfi, err := getPathInfo(srcPath)
if err != nil {
return err
}
destdir := destPath
if !srcfi.IsDir() && !strings.HasSuffix(dest, string(os.PathSeparator)) {
destdir = filepath.Dir(destPath)
}
_, err = os.Stat(destdir)
if err != nil && !os.IsNotExist(err) {
return errors.Wrapf(err, "error checking directory %q", destdir)
}
destDirIsExist := (err == nil)
if err = os.MkdirAll(destdir, 0755); err != nil {
return errors.Wrapf(err, "error creating directory %q", destdir)
}
// return functions for copying items
copyFileWithTar := chrootarchive.CopyFileWithTarAndChown(chownOpts, digest.Canonical.Digester().Hash(), idMappingOpts.UIDMap, idMappingOpts.GIDMap)
copyWithTar := chrootarchive.CopyWithTarAndChown(chownOpts, digest.Canonical.Digester().Hash(), idMappingOpts.UIDMap, idMappingOpts.GIDMap)
untarPath := chrootarchive.UntarPathAndChown(chownOpts, digest.Canonical.Digester().Hash(), idMappingOpts.UIDMap, idMappingOpts.GIDMap)
if srcfi.IsDir() {
logrus.Debugf("copying %q to %q", srcPath+string(os.PathSeparator)+"*", dest+string(os.PathSeparator)+"*")
if destDirIsExist && !strings.HasSuffix(src, fmt.Sprintf("%s.", string(os.PathSeparator))) {
destPath = filepath.Join(destPath, filepath.Base(srcPath))
}
if err = copyWithTar(srcPath, destPath); err != nil {
return errors.Wrapf(err, "error copying %q to %q", srcPath, dest)
}
return nil
}
if !archive.IsArchivePath(srcPath) {
// This srcPath is a file, and either it's not an
// archive, or we don't care whether or not it's an
// archive.
destfi, err := os.Stat(destPath)
if err != nil {
if !os.IsNotExist(err) {
return errors.Wrapf(err, "failed to get stat of dest path %s", destPath)
}
}
if destfi != nil && destfi.IsDir() {
destPath = filepath.Join(destPath, filepath.Base(srcPath))
}
}
if extract {
// We're extracting an archive into the destination directory.
logrus.Debugf("extracting contents of %q into %q", srcPath, destPath)
if err = untarPath(srcPath, destPath); err != nil {
return errors.Wrapf(err, "error extracting %q into %q", srcPath, destPath)
}
return nil
}
// Copy the file, preserving attributes.
logrus.Debugf("copying %q to %q", srcPath, destPath)
if err = copyFileWithTar(srcPath, destPath); err != nil {
return errors.Wrapf(err, "error copying %q to %q", srcPath, destPath)
}
return nil
}
func convertIDMap(idMaps []idtools.IDMap) (convertedIDMap []specs.LinuxIDMapping) {
for _, idmap := range idMaps {
tempIDMap := specs.LinuxIDMapping{
ContainerID: uint32(idmap.ContainerID),
HostID: uint32(idmap.HostID),
Size: uint32(idmap.Size),
}
convertedIDMap = append(convertedIDMap, tempIDMap)
}
return convertedIDMap
}
|
