From c8dbad5856170e32554db2345acd43c2bb0bd729 Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Mon, 16 Oct 2023 16:42:27 +0200
Subject: Track each entry's index.

---
 lbup/_mountinfo.py | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/lbup/_mountinfo.py b/lbup/_mountinfo.py
index 0328131..d2640ce 100644
--- a/lbup/_mountinfo.py
+++ b/lbup/_mountinfo.py
@@ -24,6 +24,8 @@ class NotAbsRoot(Exception):
     pass
 
 class _MountEntry:
+    index         = None
+    "index of this entry in mountinfo"
     mount_id      = None
     "mount ID, bytes"
     parent_id     = None
@@ -51,7 +53,8 @@ class _MountEntry:
     parent        = None
     "parent mountinfo entry, None if it does not exit"
 
-    def __init__(self, line):
+    def __init__(self, index, line):
+        self.index     = index
         self.raw_entry = line
 
         items = line.split()
@@ -111,9 +114,9 @@ class MountInfo:
 
     def __init__(self, data):
         mounts = OrderedDict()
-        for line in data.splitlines():
+        for i, line in enumerate(data.splitlines()):
             try:
-                e = _MountEntry(line)
+                e = _MountEntry(i, line)
             except NotAbsRoot:
                 pass
 
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