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Merge pull request #591 from CnCNet/develop
Release 2.11.2.0
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,94 @@ | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.IO; | ||
| using System.Linq; | ||
| using System.Runtime.InteropServices; | ||
| using System.Runtime.Versioning; | ||
| using System.Text; | ||
| using System.Threading.Tasks; | ||
|
|
||
| using ClientCore.Extensions; | ||
|
|
||
| using Rampastring.Tools; | ||
|
|
||
| namespace ClientCore | ||
| { | ||
| public class FileHelper | ||
| { | ||
|
|
||
| /// <summary> | ||
| /// Establishes a hard link between an existing file and a new file. This function is only supported on the NTFS file system, and only for files, not directories. | ||
| /// <br/> | ||
| /// https://learn.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-createhardlinkw | ||
| /// </summary> | ||
| /// <param name="lpFileName">The name of the new file.</param> | ||
| /// <param name="lpExistingFileName">The name of the existing file.</param> | ||
| /// <param name="lpSecurityAttributes">Reserved; must be NULL.</param> | ||
| /// <returns>If the function succeeds, the return value is nonzero. If the function fails, the return value is zero (0).</returns> | ||
| [DllImport("Kernel32.dll", SetLastError = true, CharSet = CharSet.Unicode, EntryPoint = "CreateHardLinkW")] | ||
| [DefaultDllImportSearchPaths(DllImportSearchPath.System32)] | ||
| [SupportedOSPlatform("windows")] | ||
| private static extern bool CreateHardLink(string lpFileName, string lpExistingFileName, IntPtr lpSecurityAttributes); | ||
|
|
||
| /// <summary> | ||
| /// The link function makes a new link to the existing file named by oldname, under the new name newname. | ||
| /// <br/> | ||
| /// https://www.gnu.org/software/libc/manual/html_node/Hard-Links.html | ||
| /// <param name="oldname"></param> | ||
| /// <param name="newname"></param> | ||
| /// <returns>This function returns a value of 0 if it is successful and -1 on failure.</returns> | ||
| [DllImport("libc", EntryPoint = "link", SetLastError = true)] | ||
| [SupportedOSPlatform("linux")] | ||
| [SupportedOSPlatform("osx")] | ||
| private static extern int link([MarshalAs(UnmanagedType.LPUTF8Str)] string oldname, [MarshalAs(UnmanagedType.LPUTF8Str)] string newname); | ||
|
|
||
| /// <summary> | ||
| /// Creates hard link to the source file or copy that file, if got an error. | ||
| /// </summary> | ||
| /// <param name="source"></param> | ||
| /// <param name="destination"></param> | ||
| /// <param name="fallback"></param> | ||
| /// <exception cref="IOException"></exception> | ||
| /// <exception cref="PlatformNotSupportedException"></exception> | ||
| public static void CreateHardLinkFromSource(string source, string destination, bool fallback = true) | ||
| { | ||
| if (fallback) | ||
| { | ||
| try | ||
| { | ||
| CreateHardLinkFromSource(source, destination, fallback: false); | ||
| } | ||
| catch (Exception ex) | ||
| { | ||
| Logger.Log($"Failed to create hard link at {destination}. Fallback to copy. {ex.Message}"); | ||
| File.Copy(source, destination, true); | ||
| } | ||
|
|
||
| return; | ||
| } | ||
|
|
||
| if (File.Exists(destination)) | ||
| { | ||
| FileInfo destinationFile = new(destination); | ||
| destinationFile.IsReadOnly = false; | ||
| destinationFile.Delete(); | ||
| } | ||
|
|
||
| if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows)) | ||
| { | ||
| if (!CreateHardLink(destination, source, IntPtr.Zero)) | ||
| Marshal.ThrowExceptionForHR(Marshal.GetHRForLastWin32Error()); | ||
| } | ||
| else if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux) || RuntimeInformation.IsOSPlatform(OSPlatform.OSX)) | ||
| { | ||
| if (link(source, destination) != 0) | ||
| throw new IOException(string.Format("Unable to create hard link at {0} with the following error code: {1}" | ||
| .L10N("Client:DTAConfig:CreateHardLinkFailed"), destination, Marshal.GetLastWin32Error())); | ||
| } | ||
| else | ||
| { | ||
| throw new PlatformNotSupportedException(); | ||
| } | ||
| } | ||
| } | ||
| } |
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