1 files changed, 70 insertions, 0 deletions
diff --git a/libpthread/signal/kill.c b/libpthread/signal/kill.c
new file mode 100644
index 00000000..27c9c32a
--- /dev/null
+++ b/libpthread/signal/kill.c
@@ -0,0 +1,70 @@
+/* kill.c - Generic kill implementation.
+   Copyright (C) 2008 Free Software Foundation, Inc.
+   Written by Neal H. Walfield <neal@gnu.org>.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public License
+   as published by the Free Software Foundation; either version 3 of
+   the License, or (at your option) any later version.
+
+   The GNU Hurd is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this program.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include "sig-internal.h"
+
+int
+kill (pid_t pid, int signo)
+{
+  if (pid != getpid ())
+    {
+      errno = EOPNOTSUPP;
+      return -1;
+    }
+
+  /* "Signals generated for the process shall be delivered to exactly
+     one of those threads within the process which is in a call to a
+     sigwait() function selecting that signal or has not blocked
+     delivery of the signal.  If there are no threads in a call to a
+     sigwait() function selecting that signal, and if all threads
+     within the process block delivery of the signal, the signal shall
+     remaing pending on the process" (2.4.1).  */
+
+  /* First, see if there is a waiter, which is interested in this
+     signal.  */
+  pthread_mutex_lock (&sig_lock);
+
+  struct sigwaiter *waiter;
+  for (waiter = sigwaiters; waiter; waiter = waiter->next)
+    if ((waiter->signals & sigmask (signo)))
+      /* Got a winner.  */
+      {
+	sigdelset (&process_pending, signo);
+
+	pthread_mutex_lock (&waiter->ss->lock);
+	sigdelset (&waiter->ss->pending, signo);
+
+	memset (&waiter->info, 0, sizeof (waiter->info));
+	waiter->info.si_signo = signo;
+
+	sigwaiter_unblock (waiter);
+
+	return 0;
+      }
+
+  pthread_mutex_unlock (&sig_lock);
+
+  /* XXX: We just generate the signal for the current thread.  If the
+     current thread has blocked the signal, the correct thing to do is
+     to iterate over all the other threads and find on that hasn't
+     blocked it.  */
+  return pthread_kill (pthread_self (), signo);
+}
+