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Cygwin: pty: Fix the issue regarding open and close multiple PTYs. 

- If two PTYs are opened in the same process and the first one
  is closed, the helper process for the first PTY remains running.
  This patch fixes the issue.
This commit is contained in:
Takashi Yano 2020-01-14 13:10:54 +09:00 committed by Corinna Vinschen
parent a1c7e92084
commit bb7741acf8
1 changed files with 11 additions and 4 deletions
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15
winsup/cygwin/fhandler_tty.cc
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@ -2224,8 +2224,7 @@ fhandler_pty_master::close ()
termios_printf ("CloseHandle (output_mutex<%p>), %E", output_mutex);
if (!NT_SUCCESS (status))
debug_printf ("NtQueryObject: %y", status);
else if (obi.HandleCount == (get_pseudo_console () ? 2 : 1))
/* Helper process has inherited one. */
else if (obi.HandleCount == 1)
{
termios_printf ("Closing last master of pty%d", get_minor ());
/* Close Pseudo Console */
@ -3167,14 +3166,14 @@ fhandler_pty_master::setup_pseudoconsole ()
get_ttyp ()->attach_pcon_in_fork = true;
SIZE_T bytesRequired;
InitializeProcThreadAttributeList (NULL, 1, 0, &bytesRequired);
InitializeProcThreadAttributeList (NULL, 2, 0, &bytesRequired);
STARTUPINFOEXW si_helper;
ZeroMemory (&si_helper, sizeof (si_helper));
si_helper.StartupInfo.cb = sizeof (STARTUPINFOEXW);
si_helper.lpAttributeList = (PPROC_THREAD_ATTRIBUTE_LIST)
HeapAlloc (GetProcessHeap (), 0, bytesRequired);
InitializeProcThreadAttributeList (si_helper.lpAttributeList,
1, 0, &bytesRequired);
2, 0, &bytesRequired);
UpdateProcThreadAttribute (si_helper.lpAttributeList,
0,
PROC_THREAD_ATTRIBUTE_PSEUDOCONSOLE,
@ -3186,6 +3185,14 @@ fhandler_pty_master::setup_pseudoconsole ()
/* Create a pipe for receiving pseudo console handles */
HANDLE hr, hw;
CreatePipe (&hr, &hw, &sec_none, 0);
/* Inherit only handles which are needed by helper. */
HANDLE handles_to_inherit[] = {hello, goodbye, hw};
UpdateProcThreadAttribute (si_helper.lpAttributeList,
0,
PROC_THREAD_ATTRIBUTE_HANDLE_LIST,
handles_to_inherit,
sizeof (handles_to_inherit),
NULL, NULL);
/* Create helper process */
WCHAR cmd[MAX_PATH];
path_conv helper ("/bin/cygwin-console-helper.exe");