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
|
#region Disclaimer / License
// Copyright (C) 2011, Kenneth Skovhede
// http://www.hexad.dk, opensource@hexad.dk
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
//
using System.Linq;
#endregion
using System;
using System.Collections.Generic;
using System.Text;
namespace Duplicati.Library.Snapshots
{
/// <summary>
/// A simple implementation of snapshots that only uses the regular System.IO operations,
/// used to simplify code that uses snapshots, but also handles a non-snapshot enabled systems
/// </summary>
public abstract class NoSnapshot : ISnapshotService
{
/// <summary>
/// The list of all folders in the snapshot
/// </summary>
protected string[] m_sources;
/// <summary>
/// A frequently used char-as-string
/// </summary>
protected readonly string DIR_SEP = System.IO.Path.DirectorySeparatorChar.ToString();
/// <summary>
/// Constructs a new backup snapshot, using all the required disks
/// </summary>
/// <param name="sourcepaths">The folders that are about to be backed up</param>
public NoSnapshot(string[] sources)
: this(sources, new Dictionary<string, string>())
{
}
/// <summary>
/// Constructs a new backup snapshot, using all the required disks
/// </summary>
/// <param name="folders">The folders that are about to be backed up</param>
/// <param name="options">A set of system options</param>
public NoSnapshot(string[] sources, Dictionary<string, string> options)
{
m_sources = new string[sources.Length];
for (int i = 0; i < m_sources.Length; i++)
m_sources[i] = System.IO.Directory.Exists(sources[i]) ? Utility.Utility.AppendDirSeparator(sources[i]) : sources[i];
}
#region Private Methods
/// <summary>
/// Lists all folders in the given folder
/// </summary>
/// <returns>All folders found in the folder</returns>
/// <param name='folder'>The folder to examinate</param>
protected virtual string[] ListFolders(string folder)
{
return System.IO.Directory.GetDirectories(folder);
}
/// <summary>
/// Lists all files in the given folder
/// </summary>
/// <returns>All folders found in the folder</returns>
/// <param name='folder'>The folder to examinate</param>
protected virtual string[] ListFiles(string folder)
{
return System.IO.Directory.GetFiles(folder);
}
#endregion
#region ISnapshotService Members
/// <summary>
/// Cleans up any resources and closes the backup set
/// </summary>
public void Dispose()
{
}
/// <summary>
/// Enumerates all files and folders in the snapshot
/// </summary>
/// <param name="callback">The callback to invoke with each found path</param>
public IEnumerable<string> EnumerateFilesAndFolders(Duplicati.Library.Utility.Utility.EnumerationFilterDelegate callback)
{
return m_sources.SelectMany(
s => Utility.Utility.EnumerateFileSystemEntries(s, callback, this.ListFolders, this.ListFiles, this.GetAttributes)
);
}
/// <summary>
/// Gets the last write time of a given file in UTC
/// </summary>
/// <param name="file">The full path to the file in non-snapshot format</param>
/// <returns>The last write time of the file</returns>
public virtual DateTime GetLastWriteTimeUtc(string file)
{
return System.IO.File.GetLastWriteTimeUtc(file);
}
/// <summary>
/// Gets the last write time of a given file in UTC
/// </summary>
/// <param name="file">The full path to the file in non-snapshot format</param>
/// <returns>The last write time of the file</returns>
public virtual DateTime GetCreationTimeUtc(string file)
{
return System.IO.File.GetCreationTimeUtc(file);
}
/// <summary>
/// Opens a file for reading
/// </summary>
/// <param name="file">The full path to the file in non-snapshot format</param>
/// <returns>An open filestream that can be read</returns>
public virtual System.IO.Stream OpenRead(string file)
{
return System.IO.File.Open(file, System.IO.FileMode.Open, System.IO.FileAccess.Read, System.IO.FileShare.ReadWrite);
}
/// <summary>
/// Returns the size of a file
/// </summary>
/// <param name="file">The full path to the file in non-snapshot format</param>
/// <returns>The lenth of the file</returns>
public virtual long GetFileSize(string file)
{
return new System.IO.FileInfo(file).Length;
}
/// <summary>
/// Returns the symlink target if the entry is a symlink, and null otherwise
/// </summary>
/// <param name="file">The file or folder to examine</param>
/// <returns>The symlink target</returns>
public abstract string GetSymlinkTarget(string file);
/// <summary>
/// Gets the attributes for the given file or folder
/// </summary>
/// <returns>The file attributes</returns>
/// <param name="file">The file or folder to examine</param>
public virtual System.IO.FileAttributes GetAttributes(string file)
{
if (file.EndsWith(DIR_SEP))
return System.IO.File.GetAttributes(file.Substring(0, file.Length - 1));
else
return System.IO.File.GetAttributes(file);
}
/// <summary>
/// Gets the metadata for the given file or folder
/// </summary>
/// <returns>The metadata for the given file or folder</returns>
/// <param name="file">The file or folder to examine</param>
public abstract Dictionary<string, string> GetMetadata(string file);
/// <summary>
/// Gets a value indicating if the path points to a block device
/// </summary>
/// <returns><c>true</c> if this instance is a block device; otherwise, <c>false</c>.</returns>
/// <param name="file">The file or folder to examine</param>
public abstract bool IsBlockDevice(string file);
/// <summary>
/// Gets a unique hardlink target ID
/// </summary>
/// <returns>The hardlink ID</returns>
/// <param name="file">The file or folder to examine</param>
public abstract string HardlinkTargetID(string path);
#endregion
}
}
|
