# HG changeset patch
# User Markus Mützel <markus.muetzel@gmx.de>
# Date 1661276656 -7200
# Node ID 4c38cf0ce06cf4a37a5eb37ec6f3235d5a62defd
# Parent  6bcc5e6d77fef32f97ec341af9dd0aa0b741a1f4
canonicalize_file_name: Check root of potential mapped network drive (bug #62847).

* liboctave/system/file-ops.cc (canonicalize_file_name): Make sure to compare
with the canonicalized path corresponding to the root of the drive when checking
if a file is on a mapped network drive.

diff -r 6bcc5e6d77fe -r 4c38cf0ce06c liboctave/system/file-ops.cc
--- a/liboctave/system/file-ops.cc	Thu Aug 18 08:40:57 2022 +0200
+++ b/liboctave/system/file-ops.cc	Tue Aug 23 19:44:16 2022 +0200
@@ -750,11 +750,12 @@
 
           // If the initial path looked like a mapped network drive, replace
           // portion of path that corresponds to mapped root with drive root.
-          if (name.size () < 2 || name[1] != ':')
+          if (name.size () < 3 || name[1] != ':')
             return retval;
 
           // UNC path corresponding to original drive letter (mappped drive)
-          std::wstring orig_map = wname.substr (0, 2);
+          std::wstring orig_map = wname.substr (0, 3);
+          orig_map[2] = L'\\';
           HANDLE h_map = CreateFileW (orig_map.c_str (), GENERIC_READ,
                                       FILE_SHARE_READ, nullptr, OPEN_EXISTING,
                                       FILE_FLAG_BACKUP_SEMANTICS