Initial revision

diff --git a/sysdeps/mach/hurd/sigaction.c b/sysdeps/mach/hurd/sigaction.c
new file mode 100644 (file)
index 0000000..36b8788
--- /dev/null
+++ b/sysdeps/mach/hurd/sigaction.c
@@ -0,0 +1,78 @@
+/* Copyright (C) 1991, 1992 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>
+
+/* 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;
+
+  if (sig <= 0 || sig >= NSIG ||
+      (act != NULL && act->sa_handler != SIG_DFL &&
+       ((__sigmask (sig) & _SIG_CANT_IGNORE) ||
+       act->sa_handler == SIG_ERR)))
+    {
+      errno = EINVAL;
+      return -1;
+    }
+
+  /* Copy so we fault before taking locks.  */
+  if (act != NULL)
+    a = *act;
+
+  ss = _hurd_thread_sigstate (__mach_thread_self ());
+
+  if (sig == SIGCHLD && act != NULL)
+    __proc_mark_nostopchild (_hurd_proc, a.sa_flags & SA_NOCLDSTOP);
+
+  old = ss->actions[sig];
+
+  if (act != NULL)
+    {
+      /* If SIG is to be ignored, remove it from the pending set.  */
+      if (a.sa_handler == SIG_IGN)
+       __sigdelmember (sig, &ss->pending);
+      else
+       switch (sig)
+         {
+         case SIGCONT:
+         case SIGIO:
+         case SIGURG:
+         case SIGCHLD:
+         case SIGWINCH:
+           if (a.sa_handler == SIG_DFL)
+             __sigdelmember (sig, &ss->pending);
+         }
+      
+      ss->actions[sig] = a;
+    }
+  __mutex_unlock (&ss->lock);
+
+  if (oact != NULL)
+    *oact = old;
+
+  return 0;
+}