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Cygwin: handle_sigprocmask: If new signal set is NULL, ignore "how" 

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:

"If set is a null pointer, the value of the argument how is not
significant"

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This commit is contained in:
Corinna Vinschen 2022-03-01 14:09:56 +01:00
parent 25937aa1d0
commit c78f149733
1 changed files with 3 additions and 3 deletions
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6
winsup/cygwin/signal.cc
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@ -205,15 +205,15 @@ sigprocmask (int how, const sigset_t *set, sigset_t *oldset)
int __reg3 int __reg3
handle_sigprocmask (int how, const sigset_t *set, sigset_t *oldset, sigset_t& opmask) handle_sigprocmask (int how, const sigset_t *set, sigset_t *oldset, sigset_t& opmask)
{ {
/* check that how is in right range */ /* check that how is in right range if set is not NULL */
if (how != SIG_BLOCK && how != SIG_UNBLOCK && how != SIG_SETMASK) if (set && how != SIG_BLOCK && how != SIG_UNBLOCK && how != SIG_SETMASK)
{ {
syscall_printf ("Invalid how value %d", how); syscall_printf ("Invalid how value %d", how);
return EINVAL; return EINVAL;
} }
__try __try
{ {
if (oldset) if (oldset)
*oldset = opmask; *oldset = opmask;