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-rw-r--r--sysdeps/mach/hurd/sigaction.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/sysdeps/mach/hurd/sigaction.c b/sysdeps/mach/hurd/sigaction.c
index ebe70664be..df28131281 100644
--- a/sysdeps/mach/hurd/sigaction.c
+++ b/sysdeps/mach/hurd/sigaction.c
@@ -67,6 +67,14 @@ DEFUN(__sigaction, (sig, act, oact),
__spin_lock (&ss->lock);
pending = ss->pending & ~ss->blocked;
}
+ else if (a.sa_handler == SIG_IGN || a.sa_handler == SIG_DFL)
+ /* We are changing to an action that might be to ignore SIG signals.
+ If SIG is blocked and pending and the new action is to ignore it, we
+ must remove it from the pending set now; if the action is changed
+ back and then SIG is unblocked, the signal pending now should not
+ arrive. So wake up the signal thread to check the new state and do
+ the right thing. */
+ pending = ss->pending & __sigmask (sig);
else
pending = 0;