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* [newlib-cygwin] Cygwin: pipes: do not duplicate sec_none{_nih} locally when creating objects
@ 2021-09-14 15:07 Corinna Vinschen
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From: Corinna Vinschen @ 2021-09-14 15:07 UTC (permalink / raw)
To: cygwin-cvs
https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=8985f1c7c4d621498642e1c0fd349a5526006de4
commit 8985f1c7c4d621498642e1c0fd349a5526006de4
Author: Corinna Vinschen <corinna@vinschen.de>
Date: Mon Sep 13 22:02:51 2021 +0200
Cygwin: pipes: do not duplicate sec_none{_nih} locally when creating objects
We already fetched the correct SECURITY_ATTRIBUTES at the start of
fhandler_pipe::create, so using another SECURITY_ATTRIBUTES object for
the mutex and semaphore objects doesn't make much sense.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Diff:
---
winsup/cygwin/fhandler_pipe.cc | 10 +++-------
1 file changed, 3 insertions(+), 7 deletions(-)
diff --git a/winsup/cygwin/fhandler_pipe.cc b/winsup/cygwin/fhandler_pipe.cc
index 62cb1c0ec..70cfa3784 100644
--- a/winsup/cygwin/fhandler_pipe.cc
+++ b/winsup/cygwin/fhandler_pipe.cc
@@ -769,11 +769,7 @@ fhandler_pipe::create (fhandler_pipe *fhs[2], unsigned psize, int mode)
unique_id);
/* For the read side of the pipe, add a mutex. See raw_read for the
usage. */
- SECURITY_ATTRIBUTES sa = { .nLength = sizeof (SECURITY_ATTRIBUTES),
- .lpSecurityDescriptor = NULL,
- .bInheritHandle = !(mode & O_CLOEXEC)
- };
- HANDLE mtx = CreateMutexW (&sa, FALSE, NULL);
+ HANDLE mtx = CreateMutexW (sa, FALSE, NULL);
if (!mtx)
{
delete fhs[0];
@@ -786,11 +782,11 @@ fhandler_pipe::create (fhandler_pipe *fhs[2], unsigned psize, int mode)
fhs[0]->set_read_mutex (mtx);
res = 0;
}
- fhs[0]->select_sem = CreateSemaphore (&sa, 0, INT32_MAX, NULL);
+ fhs[0]->select_sem = CreateSemaphore (sa, 0, INT32_MAX, NULL);
if (fhs[0]->select_sem)
DuplicateHandle (GetCurrentProcess (), fhs[0]->select_sem,
GetCurrentProcess (), &fhs[1]->select_sem,
- 0, !(mode & O_CLOEXEC), DUPLICATE_SAME_ACCESS);
+ 0, sa->bInheritHandle, DUPLICATE_SAME_ACCESS);
}
debug_printf ("%R = pipe([%p, %p], %d, %y)", res, fhs[0], fhs[1], psize, mode);
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