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Implement GetFileLinkCount() for Linux

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Bartłomiej Dach 2022-12-28 21:58:30 +01:00
parent d4b3965967
commit 8d79fa93ac
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1 changed files with 58 additions and 7 deletions
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55
osu.Game/IO/HardLinkHelper.cs
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@ -81,6 +81,10 @@ namespace osu.Game.IO
public static int GetFileLinkCount(string filePath)
{
int result = 0;
switch (RuntimeInfo.OS)
{
case RuntimeInfo.Platform.Windows:
SafeFileHandle handle = CreateFile(filePath, FileAccess.Read, FileShare.Read, IntPtr.Zero, FileMode.Open, FileAttributes.Archive, IntPtr.Zero);
ByHandleFileInformation fileInfo;
@ -88,12 +92,19 @@ namespace osu.Game.IO
if (GetFileInformationByHandle(handle, out fileInfo))
result = (int)fileInfo.NumberOfLinks;
CloseHandle(handle);
break;
case RuntimeInfo.Platform.Linux:
if (stat(filePath, out var statbuf) == 0)
result = (int)statbuf.st_nlink;
break;
}
return result;
}
[DllImport("libc", SetLastError = true)]
public static extern int link(string oldpath, string newpath);
#region Windows native methods
[DllImport("Kernel32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
public static extern bool CreateHardLink(string lpFileName, string lpExistingFileName, IntPtr lpSecurityAttributes);
@ -129,5 +140,45 @@ namespace osu.Game.IO
public readonly uint FileIndexHigh;
public readonly uint FileIndexLow;
}
#endregion
#region Linux native methods
[DllImport("libc", SetLastError = true)]
public static extern int link(string oldpath, string newpath);
[DllImport("libc", SetLastError = true)]
private static extern int stat(string pathname, out struct_stat statbuf);
// ReSharper disable once InconsistentNaming
// Struct layout is likely non-portable across unices. Tread with caution.
[StructLayout(LayoutKind.Sequential)]
private struct struct_stat
{
public readonly long st_dev;
public readonly long st_ino;
public readonly long st_nlink;
public readonly int st_mode;
public readonly int st_uid;
public readonly int st_gid;
public readonly long st_rdev;
public readonly long st_size;
public readonly long st_blksize;
public readonly long st_blocks;
public readonly timespec st_atim;
public readonly timespec st_mtim;
public readonly timespec st_ctim;
}
// ReSharper disable once InconsistentNaming
[StructLayout(LayoutKind.Sequential)]
private struct timespec
{
public readonly long tv_sec;
public readonly long tv_nsec;
}
#endregion
}
}