a geicko-2 based round robin ranking system designed to test c++ battleship submissions
battleship.dunkirk.sh
dunkirk.sh
1package sftp
2
3// ssh_FXP_ATTRS support
4// see https://filezilla-project.org/specs/draft-ietf-secsh-filexfer-02.txt#section-5
5
6import (
7 "os"
8 "time"
9)
10
11const (
12 sshFileXferAttrSize = 0x00000001
13 sshFileXferAttrUIDGID = 0x00000002
14 sshFileXferAttrPermissions = 0x00000004
15 sshFileXferAttrACmodTime = 0x00000008
16 sshFileXferAttrExtended = 0x80000000
17
18 sshFileXferAttrAll = sshFileXferAttrSize | sshFileXferAttrUIDGID | sshFileXferAttrPermissions |
19 sshFileXferAttrACmodTime | sshFileXferAttrExtended
20)
21
22// fileInfo is an artificial type designed to satisfy os.FileInfo.
23type fileInfo struct {
24 name string
25 stat *FileStat
26}
27
28// Name returns the base name of the file.
29func (fi *fileInfo) Name() string { return fi.name }
30
31// Size returns the length in bytes for regular files; system-dependent for others.
32func (fi *fileInfo) Size() int64 { return int64(fi.stat.Size) }
33
34// Mode returns file mode bits.
35func (fi *fileInfo) Mode() os.FileMode { return fi.stat.FileMode() }
36
37// ModTime returns the last modification time of the file.
38func (fi *fileInfo) ModTime() time.Time { return fi.stat.ModTime() }
39
40// IsDir returns true if the file is a directory.
41func (fi *fileInfo) IsDir() bool { return fi.Mode().IsDir() }
42
43func (fi *fileInfo) Sys() interface{} { return fi.stat }
44
45// FileStat holds the original unmarshalled values from a call to READDIR or
46// *STAT. It is exported for the purposes of accessing the raw values via
47// os.FileInfo.Sys(). It is also used server side to store the unmarshalled
48// values for SetStat.
49type FileStat struct {
50 Size uint64
51 Mode uint32
52 Mtime uint32
53 Atime uint32
54 UID uint32
55 GID uint32
56 Extended []StatExtended
57}
58
59// ModTime returns the Mtime SFTP file attribute converted to a time.Time
60func (fs *FileStat) ModTime() time.Time {
61 return time.Unix(int64(fs.Mtime), 0)
62}
63
64// AccessTime returns the Atime SFTP file attribute converted to a time.Time
65func (fs *FileStat) AccessTime() time.Time {
66 return time.Unix(int64(fs.Atime), 0)
67}
68
69// FileMode returns the Mode SFTP file attribute converted to an os.FileMode
70func (fs *FileStat) FileMode() os.FileMode {
71 return toFileMode(fs.Mode)
72}
73
74// StatExtended contains additional, extended information for a FileStat.
75type StatExtended struct {
76 ExtType string
77 ExtData string
78}
79
80func fileInfoFromStat(stat *FileStat, name string) os.FileInfo {
81 return &fileInfo{
82 name: name,
83 stat: stat,
84 }
85}
86
87// FileInfoUidGid extends os.FileInfo and adds callbacks for Uid and Gid retrieval,
88// as an alternative to *syscall.Stat_t objects on unix systems.
89type FileInfoUidGid interface {
90 os.FileInfo
91 Uid() uint32
92 Gid() uint32
93}
94
95// FileInfoUidGid extends os.FileInfo and adds a callbacks for extended data retrieval.
96type FileInfoExtendedData interface {
97 os.FileInfo
98 Extended() []StatExtended
99}
100
101func fileStatFromInfo(fi os.FileInfo) (uint32, *FileStat) {
102 mtime := fi.ModTime().Unix()
103 atime := mtime
104 var flags uint32 = sshFileXferAttrSize |
105 sshFileXferAttrPermissions |
106 sshFileXferAttrACmodTime
107
108 fileStat := &FileStat{
109 Size: uint64(fi.Size()),
110 Mode: fromFileMode(fi.Mode()),
111 Mtime: uint32(mtime),
112 Atime: uint32(atime),
113 }
114
115 // os specific file stat decoding
116 fileStatFromInfoOs(fi, &flags, fileStat)
117
118 // The call above will include the sshFileXferAttrUIDGID in case
119 // the os.FileInfo can be casted to *syscall.Stat_t on unix.
120 // If fi implements FileInfoUidGid, retrieve Uid, Gid from it instead.
121 if fiExt, ok := fi.(FileInfoUidGid); ok {
122 flags |= sshFileXferAttrUIDGID
123 fileStat.UID = fiExt.Uid()
124 fileStat.GID = fiExt.Gid()
125 }
126
127 // if fi implements FileInfoExtendedData, retrieve extended data from it
128 if fiExt, ok := fi.(FileInfoExtendedData); ok {
129 fileStat.Extended = fiExt.Extended()
130 if len(fileStat.Extended) > 0 {
131 flags |= sshFileXferAttrExtended
132 }
133 }
134
135 return flags, fileStat
136}