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From: Corinna Vinschen <corinna@sourceware.org>
To: cygwin-cvs@sourceware.org
Subject: [newlib-cygwin] Cygwin: handle_sigprocmask: If new signal set is NULL,
 ignore "how"
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https://sourceware.org/git/gitweb.cgi?p=3Dnewlib-cygwin.git;h=3Dc78f1497338=
99f29f5881e290b4c3cd8c23c11ef

commit c78f149733899f29f5881e290b4c3cd8c23c11ef
Author: Corinna Vinschen <corinna@vinschen.de>
Date:   Tue Mar 1 14:09:56 2022 +0100

    Cygwin: handle_sigprocmask: If new signal set is NULL, ignore "how"
   =20
    The "how" value only makes sense if a new set is given.  If we
    only read the current signal set, ignore the value of "how" per
    POSIX:
   =20
    "If set is a null pointer, the value of the argument how is not
    significant"
   =20
    Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

Diff:
---
 winsup/cygwin/signal.cc | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/winsup/cygwin/signal.cc b/winsup/cygwin/signal.cc
index 2cf750f5c..9b6c2509d 100644
--- a/winsup/cygwin/signal.cc
+++ b/winsup/cygwin/signal.cc
@@ -205,15 +205,15 @@ sigprocmask (int how, const sigset_t *set, sigset_t *=
oldset)
 int __reg3
 handle_sigprocmask (int how, const sigset_t *set, sigset_t *oldset, sigset=
_t& opmask)
 {
-  /* check that how is in right range */
-  if (how !=3D SIG_BLOCK && how !=3D SIG_UNBLOCK && how !=3D SIG_SETMASK)
+  /* check that how is in right range if set is not NULL */
+  if (set && how !=3D SIG_BLOCK && how !=3D SIG_UNBLOCK && how !=3D SIG_SE=
TMASK)
     {
       syscall_printf ("Invalid how value %d", how);
       return EINVAL;
     }
=20
   __try
-	{
+    {
       if (oldset)
 	*oldset =3D opmask;