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Cygwin: pty: Fix state management for pseudo console support.

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- Pseudo console support introduced by commit
  169d65a577 has some bugs which
  cause mismatch between state variables and real pseudo console
  state regarding console attaching and r/w pipe switching. This
  patch fixes this issue by redesigning the state management.
This commit is contained in:
Takashi Yano
2019-09-04 10:45:35 +09:00
committed by Corinna Vinschen
parent ffbb9b4971
commit 583102e7c9
6 changed files with 290 additions and 255 deletions
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25
winsup/cygwin/fhandler_console.cc
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@ -3136,16 +3136,29 @@ DWORD
fhandler_console::get_console_process_id (DWORD pid, bool match)
{
DWORD tmp;
int num = GetConsoleProcessList (&tmp, 1);
DWORD *list = (DWORD *)
HeapAlloc (GetProcessHeap (), 0, num * sizeof (DWORD));
num = GetConsoleProcessList (list, num);
DWORD num, num_req;
num = 1;
num_req = GetConsoleProcessList (&tmp, num);
DWORD *list;
while (true)
{
list = (DWORD *)
HeapAlloc (GetProcessHeap (), 0, num_req * sizeof (DWORD));
num = num_req;
num_req = GetConsoleProcessList (list, num);
if (num_req > num)
HeapFree (GetProcessHeap (), 0, list);
else
break;
}
num = num_req;
tmp = 0;
for (int i=0; i<num; i++)
for (DWORD i=0; i<num; i++)
if ((match && list[i] == pid) || (!match && list[i] != pid))
{
tmp = list[i];
//break;
break;
}
HeapFree (GetProcessHeap (), 0, list);
return tmp;