1 package p9pnew
2 
3 import (
4 	"fmt"
5 	"time"
6 )
7 
8 const (
9 	DefaultMSize   = 64 << 10
10 	DefaultVersion = "9P2000"
11 )
12 
13 const (
14 	NOFID = ^Fid(0)
15 	NOTAG = ^Tag(0)
16 )
17 
18 const (
19 	DMDIR    = 0x80000000 // mode bit for directories
20 	DMAPPEND = 0x40000000 // mode bit for append only files
21 	DMEXCL   = 0x20000000 // mode bit for exclusive use files
22 	DMMOUNT  = 0x10000000 // mode bit for mounted channel
23 	DMAUTH   = 0x08000000 // mode bit for authentication file
24 	DMTMP    = 0x04000000 // mode bit for non-backed-up files
25 
26 	// 9p2000.u extensions
27 	DMSYMLINK   = 0x02000000
28 	DMDEVICE    = 0x00800000
29 	DMNAMEDPIPE = 0x00200000
30 	DMSOCKET    = 0x00100000
31 	DMSETUID    = 0x00080000
32 	DMSETGID    = 0x00040000
33 
34 	DMREAD  = 0x4 // mode bit for read permission
35 	DMWRITE = 0x2 // mode bit for write permission
36 	DMEXEC  = 0x1 // mode bit for execute permission
37 )
38 
39 // Flag defines the flag type for use with open and create
40 type Flag uint8
41 
42 const (
43 	OREAD  Flag = 0x00 // open for read
44 	OWRITE      = 0x01 // write
45 	ORDWR       = 0x02 // read and write
46 	OEXEC       = 0x03 // execute, == read but check execute permission
47 
48 	// PROPOSAL(stevvooe): Possible protocal extension to allow the create of
49 	// symlinks. Initially, the link is created with no value. Read and write
50 	// to read and set the link value.
51 	OSYMLINK = 0x04
52 
53 	// or'd in
54 	OTRUNC  = 0x10 // or'ed in (except for exec), truncate file first
55 	OCEXEC  = 0x20 // or'ed in, close on exec
56 	ORCLOSE = 0x40 // or'ed in, remove on close
57 )
58 
59 // QType indicates the type of a resource within the Qid.
60 type QType uint8
61 
62 const (
63 	QTDIR    QType = 0x80 // type bit for directories
64 	QTAPPEND       = 0x40 // type bit for append only files
65 	QTEXCL         = 0x20 // type bit for exclusive use files
66 	QTMOUNT        = 0x10 // type bit for mounted channel
67 	QTAUTH         = 0x08 // type bit for authentication file
68 	QTTMP          = 0x04 // type bit for not-backed-up file
69 	QTFILE         = 0x00 // plain file
70 )
71 
72 func (qt QType) String() string {
73 	switch qt {
74 	case QTDIR:
75 		return "dir"
76 	case QTAPPEND:
77 		return "append"
78 	case QTEXCL:
79 		return "excl"
80 	case QTMOUNT:
81 		return "mount"
82 	case QTAUTH:
83 		return "auth"
84 	case QTTMP:
85 		return "tmp"
86 	case QTFILE:
87 		return "file"
88 	}
89 
90 	return "unknown"
91 }
92 
93 type Fid uint32
94 
95 type Qid struct {
96 	Type    QType `9p:type,1`
97 	Version uint32
98 	Path    uint64
99 }
100 
101 func (qid Qid) String() string {
102 	return fmt.Sprintf("qid(%v, v=%x, p=%x)",
103 		qid.Type, qid.Version, qid.Path)
104 }
105 
106 type Dir struct {
107 	Type uint16
108 	Dev  uint32
109 	Qid  Qid
110 	Mode uint32
111 
112 	// BUG(stevvooe): The Year 2038 is coming soon. 9p wire protocol has these
113 	// as 4 byte epoch times. Some possibilities include time dilation fields
114 	// or atemporal files. We can also just not use them and set them to zero.
115 
116 	AccessTime time.Time
117 	ModTime    time.Time
118 
119 	Length uint64
120 	Name   string
121 	UID    string
122 	GID    string
123 	MUID   string
124 }
125 
126 func (d Dir) String() string {
127 	return fmt.Sprintf("dir(%v mode=%v atime=%v mtime=%v length=%v name=%v uid=%v gid=%v muid=%v)",
128 		d.Qid, d.Mode, d.AccessTime, d.ModTime, d.Length, d.Name, d.UID, d.GID, d.MUID)
129 }
130 
131 //
132 type Tag uint16