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
|
//go:build linux
// +build linux
package mtree
import (
"archive/tar"
"encoding/base64"
"fmt"
"io"
"os"
"os/user"
"syscall"
"github.com/vbatts/go-mtree/pkg/govis"
"github.com/vbatts/go-mtree/xattr"
)
var (
// this is bsd specific https://www.freebsd.org/cgi/man.cgi?query=chflags&sektion=2
flagsKeywordFunc = func(path string, info os.FileInfo, r io.Reader) ([]KeyVal, error) {
return nil, nil
}
unameKeywordFunc = func(path string, info os.FileInfo, r io.Reader) ([]KeyVal, error) {
if hdr, ok := info.Sys().(*tar.Header); ok {
return []KeyVal{KeyVal(fmt.Sprintf("uname=%s", hdr.Uname))}, nil
}
stat := info.Sys().(*syscall.Stat_t)
u, err := user.LookupId(fmt.Sprintf("%d", stat.Uid))
if err != nil {
return nil, nil
}
return []KeyVal{KeyVal(fmt.Sprintf("uname=%s", u.Username))}, nil
}
gnameKeywordFunc = func(path string, info os.FileInfo, r io.Reader) ([]KeyVal, error) {
if hdr, ok := info.Sys().(*tar.Header); ok {
return []KeyVal{KeyVal(fmt.Sprintf("gname=%s", hdr.Gname))}, nil
}
stat := info.Sys().(*syscall.Stat_t)
g, err := lookupGroupID(fmt.Sprintf("%d", stat.Gid))
if err != nil {
return nil, nil
}
return []KeyVal{KeyVal(fmt.Sprintf("gname=%s", g.Name))}, nil
}
uidKeywordFunc = func(path string, info os.FileInfo, r io.Reader) ([]KeyVal, error) {
if hdr, ok := info.Sys().(*tar.Header); ok {
return []KeyVal{KeyVal(fmt.Sprintf("uid=%d", hdr.Uid))}, nil
}
stat := info.Sys().(*syscall.Stat_t)
return []KeyVal{KeyVal(fmt.Sprintf("uid=%d", stat.Uid))}, nil
}
gidKeywordFunc = func(path string, info os.FileInfo, r io.Reader) ([]KeyVal, error) {
if hdr, ok := info.Sys().(*tar.Header); ok {
return []KeyVal{KeyVal(fmt.Sprintf("gid=%d", hdr.Gid))}, nil
}
if stat, ok := info.Sys().(*syscall.Stat_t); ok {
return []KeyVal{KeyVal(fmt.Sprintf("gid=%d", stat.Gid))}, nil
}
return nil, nil
}
nlinkKeywordFunc = func(path string, info os.FileInfo, r io.Reader) ([]KeyVal, error) {
if stat, ok := info.Sys().(*syscall.Stat_t); ok {
return []KeyVal{KeyVal(fmt.Sprintf("nlink=%d", stat.Nlink))}, nil
}
return nil, nil
}
xattrKeywordFunc = func(path string, info os.FileInfo, r io.Reader) ([]KeyVal, error) {
if hdr, ok := info.Sys().(*tar.Header); ok {
if len(hdr.PAXRecords) == 0 {
return nil, nil
}
klist := []KeyVal{}
for k, v := range hdr.PAXRecords {
encKey, err := govis.Vis(k, DefaultVisFlags)
if err != nil {
return nil, nil
}
klist = append(klist, KeyVal(fmt.Sprintf("xattr.%s=%s", encKey, base64.StdEncoding.EncodeToString([]byte(v)))))
}
return klist, nil
}
if !info.Mode().IsRegular() && !info.Mode().IsDir() {
return nil, nil
}
xlist, err := xattr.List(path)
if err != nil {
return nil, nil
}
klist := make([]KeyVal, len(xlist))
for i := range xlist {
data, err := xattr.Get(path, xlist[i])
if err != nil {
return nil, nil
}
encKey, err := govis.Vis(xlist[i], DefaultVisFlags)
if err != nil {
return nil, nil
}
klist[i] = KeyVal(fmt.Sprintf("xattr.%s=%s", encKey, base64.StdEncoding.EncodeToString(data)))
}
return klist, nil
}
)
|
