readdirents(2) now returns ERANGE if insufficient storage space

was provided, but that the needed size could be copied to d_namelen.

sortix/directory.cpp

@@ -65,7 +65,7 @@ namespace Sortix
 				// space buffer is empty on the next call, so that'll probably
 				// succeed. The directory read function will store the number of
 				// bytes needed in the d_namelen variable and set errno to
-				// EINVAL such that userspace knows we need a larger buffer.
+				// ERANGE such that userspace knows we need a larger buffer.
 				if ( dir->Read(dirent, size) ) { return (prev) ? 0 : -1; }
 
 				// Insert the current dirent into the single-linked list for

sortix/fs/devfs.cpp

@@ -317,7 +317,7 @@ namespace Sortix
 		if ( available < needed )
 		{
 			dirent->d_namelen = needed;
-			Error::Set(EINVAL);
+			Error::Set(ERANGE);
 			return 0;
 		}
 

sortix/fs/initfs.cpp

@@ -184,7 +184,7 @@ namespace Sortix
 		if ( available < needed )
 		{
 			dirent->d_namelen = needed;
-			Error::Set(EINVAL);
+			Error::Set(ERANGE);
 			return 0;
 		}
 

sortix/fs/ramfs.cpp

@@ -222,7 +222,7 @@ namespace Sortix
 		if ( available < needed )
 		{
 			dirent->d_namelen = needed;
-			Error::Set(EINVAL);
+			Error::Set(ERANGE);
 			return 0;
 		}