From 50971115a52e00a6ee394eb802a4a2666fa5c353 Mon Sep 17 00:00:00 2001
From: Natalia Portillo <claunia@claunia.com>
Date: Mon, 22 Jul 2019 01:36:27 +0100
Subject: [PATCH] Implement getxattr for ISO9660.

---
 DiscImageChef.Filesystems/ISO9660/Xattr.cs | 40 +++++++++++++++++++---
 1 file changed, 35 insertions(+), 5 deletions(-)

diff --git a/DiscImageChef.Filesystems/ISO9660/Xattr.cs b/DiscImageChef.Filesystems/ISO9660/Xattr.cs
index f412a4b6c..5e47c4ed8 100644
--- a/DiscImageChef.Filesystems/ISO9660/Xattr.cs
+++ b/DiscImageChef.Filesystems/ISO9660/Xattr.cs
@@ -16,14 +16,44 @@ namespace DiscImageChef.Filesystems.ISO9660
 
             xattrs = new List<string>();
 
-            if(entry.AssociatedFile != null)
-            {
-                xattrs.Add("org.iso.9660.ea");
-            }
+            if(entry.AssociatedFile != null) xattrs.Add("org.iso.9660.ea");
 
             return Errno.NoError;
         }
 
-        public Errno GetXattr(string path, string xattr, ref byte[] buf) => throw new NotImplementedException();
+        public Errno GetXattr(string path, string xattr, ref byte[] buf)
+        {
+            buf = null;
+            if(!mounted) return Errno.AccessDenied;
+
+            Errno err = GetFileEntry(path, out DecodedDirectoryEntry entry);
+            if(err != Errno.NoError) return err;
+
+            switch(xattr)
+            {
+                case "org.iso.9660.ea":
+                    if(entry.AssociatedFile is null) return Errno.NoSuchExtendedAttribute;
+
+                    if(entry.AssociatedFile.Extent == 0) return Errno.InvalidArgument;
+
+                    if(entry.AssociatedFile.Size == 0)
+                    {
+                        buf = new byte[0];
+                        return Errno.NoError;
+                    }
+
+                    // TODO: XA
+                    uint eaSizeInSectors = entry.AssociatedFile.Size / 2048;
+                    if(entry.AssociatedFile.Size % 2048 > 0) eaSizeInSectors++;
+
+                    byte[] ea = image.ReadSectors(entry.AssociatedFile.Extent, eaSizeInSectors);
+
+                    buf = new byte[entry.AssociatedFile.Size];
+                    Array.Copy(ea, 0, buf, 0, buf.LongLength);
+
+                    return Errno.NoError;
+                default: return Errno.NoSuchExtendedAttribute;
+            }
+        }
     }
 }
\ No newline at end of file