1 files changed, 84 insertions, 0 deletions
diff --git a/sysdeps/mach/hurd/sigaction.c b/sysdeps/mach/hurd/sigaction.c
new file mode 100644
index 0000000000..91de02cd17
--- /dev/null
+++ b/sysdeps/mach/hurd/sigaction.c
@@ -0,0 +1,84 @@
+/* Copyright (C) 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#include <errno.h>
+#include <signal.h>
+#include <hurd.h>
+#include <hurd/signal.h>
+
+/* If ACT is not NULL, change the action for SIG to *ACT.
+   If OACT is not NULL, put the old action for SIG in *OACT.  */
+int
+DEFUN(__sigaction, (sig, act, oact),
+      int sig AND CONST struct sigaction *act AND struct sigaction *oact)
+{
+  struct hurd_sigstate *ss;
+  struct sigaction a, old;
+  sigset_t pending;
+
+  if (sig <= 0 || sig >= NSIG ||
+      (act != NULL && act->sa_handler != SIG_DFL &&
+       ((__sigmask (sig) & _SIG_CANT_MASK) ||
+	act->sa_handler == SIG_ERR)))
+    {
+      errno = EINVAL;
+      return -1;
+    }
+
+  /* Copy so we fault before taking locks.  */
+  if (act != NULL)
+    a = *act;
+
+  ss = _hurd_self_sigstate ();
+
+  __spin_lock (&ss->lock);
+  old = ss->actions[sig];
+  if (act != NULL)
+    ss->actions[sig] = a;
+
+  if (act != NULL && sig == SIGCHLD)
+    {
+      ss->critical_section = 1;
+      __spin_unlock (&ss->lock);
+
+      /* Inform the proc server whether or not it should send us SIGCHLD for
+	 stopped children.  We do this in a critical section so that no
+	 SIGCHLD can arrive in the middle and be of indeterminate status.  */
+      __USEPORT (PROC,
+		 __proc_mod_stopchild (port, !(a.sa_flags & SA_NOCLDSTOP)));
+
+      __spin_lock (&ss->lock);
+      ss->critical_section = 0;
+      pending = ss->pending & ~ss->blocked;
+    }
+  else
+    pending = 0;
+
+  __spin_unlock (&ss->lock);
+
+  if (pending)
+    __msg_sig_post (_hurd_msgport, 0, __mach_task_self ());
+
+  if (oact != NULL)
+    *oact = old;
+
+  return 0;
+}
+
+weak_alias (__sigaction, sigaction)