On Aug 16 08:37, Takashi Yano wrote:
> After the commit 93508e5bb841, the access permissions argument passed
> to open_shared() is ignored and always replaced with (FILE_MAP_READ |
> FILE_MAP_WRITE). This causes the weird behaviour that sshd service
> process loses its cygwin PID. This triggers the failure in pty that
> transfer_input() does not work properly.
>
> This patch resumes the access permission settings to fix that.
>
> Fixes: 93508e5bb841 ("Cygwin: open_shared: don't reuse shared_locations
> parameter as output")
> Signedd-off-by: Takashi Yano <takashi.y...@nifty.ne.jp>
> ---
> winsup/cygwin/mm/shared.cc | 6 ++----
> 1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/winsup/cygwin/mm/shared.cc b/winsup/cygwin/mm/shared.cc
> index 40cdd4722..7977df382 100644
> --- a/winsup/cygwin/mm/shared.cc
> +++ b/winsup/cygwin/mm/shared.cc
> @@ -139,8 +139,7 @@ open_shared (const WCHAR *name, int n, HANDLE& shared_h,
> DWORD size,
> if (name)
> mapname = shared_name (map_buf, name, n);
> if (m == SH_JUSTOPEN)
> - shared_h = OpenFileMappingW (FILE_MAP_READ | FILE_MAP_WRITE, FALSE,
> - mapname);
> + shared_h = OpenFileMappingW (access, FALSE, mapname);
> else
> {
> created = true;
> @@ -165,8 +164,7 @@ open_shared (const WCHAR *name, int n, HANDLE& shared_h,
> DWORD size,
> do
> {
> addr = (void *) next_address;
> - shared = MapViewOfFileEx (shared_h, FILE_MAP_READ | FILE_MAP_WRITE,
> - 0, 0, 0, addr);
> + shared = MapViewOfFileEx (shared_h, access, 0, 0, 0, addr);
> next_address += wincap.allocation_granularity ();
> if (next_address >= SHARED_REGIONS_ADDRESS_HIGH)
> {
> --
> 2.39.0
Oh drat, whatever was I thinking at the time? Thanks for catching
and fixing this! Please push.
Corinna
