On Fri, 27 May 2022 19:51:23 +0900
Takashi Yano wrote:
> diff --git a/winsup/cygwin/cygheap.cc b/winsup/cygwin/cygheap.cc
> index 01b49468e..c4031b919 100644
> --- a/winsup/cygwin/cygheap.cc
> +++ b/winsup/cygwin/cygheap.cc
> @@ -183,6 +183,8 @@ init_cygheap::init_installation_root ()
>         if (p)
>           p = wcschr (p + 1, L'\\');  /* Skip share name */
>       }
> +      else
> +     p = installation_root_buf + 4; /* 4 is the length of "\\\\?\\" */
>      }
>    installation_root_buf[1] = L'?';
>    RtlInitEmptyUnicodeString (&installation_key, installation_key_buf,

I think the following patch makes more sense.

diff --git a/winsup/cygwin/cygheap.cc b/winsup/cygwin/cygheap.cc
index 01b49468e..5623c9f5f 100644
--- a/winsup/cygwin/cygheap.cc
+++ b/winsup/cygwin/cygheap.cc
@@ -183,6 +183,11 @@ init_cygheap::init_installation_root ()
          if (p)
            p = wcschr (p + 1, L'\\');  /* Skip share name */
        }
+      else if (!wcsncmp (p + 2, L"?\\", 2))
+       {
+         len = 4;
+         p = installation_root_buf + 4;
+       }
     }
   installation_root_buf[1] = L'?';
   RtlInitEmptyUnicodeString (&installation_key, installation_key_buf,

-- 
Takashi Yano <takashi.y...@nifty.ne.jp>

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