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Track inodes and use them for hard link comparisons on linux #535

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Track inodes and use them for hard link comparisons on linux #535

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10 changes: 10 additions & 0 deletions VDF.Core/FileEntry.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -38,6 +38,14 @@ public FileEntry(FileInfo fileInfo) {
DateCreated = fileInfo.CreationTimeUtc;
DateModified = fileInfo.LastWriteTimeUtc;
FileSize = fileInfo.Length;
if (CoreUtils.IsWindows) {
Inode = 0;
} else {
var ok = Mono.Unix.Native.Syscall.stat(_Path, out var stat);
if (ok == 0) {
Inode = stat.st_ino;
}
}
}

[ProtoMember(1)]
Expand Down Expand Up @@ -65,6 +73,8 @@ public string Path {
public DateTime DateModified;
[ProtoMember(8)]
public long FileSize;
[ProtoMember(9)]
public ulong Inode;

[ProtoIgnore]
internal bool invalid = true;
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10 changes: 10 additions & 0 deletions VDF.Core/ScanEngine.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -477,6 +477,16 @@ void ScanForDuplicates() {
continue;
}

// Shortcut for linux, if the inodes are known and they are the same
// these two files are by definition hard links of each other
// no further inspection necessary
if (Settings.ExcludeHardLinks &&
entry.Inode > 0 &&
entry.Inode == compItem.Inode) {
isDuplicate = false;
break;
}


flags = DuplicateFlags.None;
isDuplicate = CheckIfDuplicate(entry, null, compItem, out difference);
Expand Down