initial import

1 files changed, 57 insertions, 0 deletions

diff --git a/sysdeps/posix/sigintr.c b/sysdeps/posix/sigintr.c
new file mode 100644
index 0000000000..441c643df8
--- /dev/null
+++ b/sysdeps/posix/sigintr.c
@@ -0,0 +1,57 @@
+/* Copyright (C) 1992, 1994 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 <stddef.h>
+#include <signal.h>
+#include <errno.h>
+
+/* If INTERRUPT is nonzero, make signal SIG interrupt system calls
+   (causing them to fail with EINTR); if INTERRUPT is zero, make system
+   calls be restarted after signal SIG.  */
+int
+DEFUN(siginterrupt, (sig, interrupt),
+      int sig AND int interrupt)
+{
+#ifdef	SA_RESTART
+  extern sigset_t _sigintr;	/* Defined in signal.c.  */
+  struct sigaction action;
+
+  if (__sigaction (sig, (struct sigaction *) NULL, &action) < 0)
+    return -1;
+
+  if (interrupt)
+    {
+      __sigaddset (&_sigintr, sig);
+      action.sa_flags &= ~SA_RESTART;
+    }
+  else
+    {
+      __sigdelset (&_sigintr, sig);
+      action.sa_flags |= SA_RESTART;
+    }
+
+  if (__sigaction (sig, &action, (struct sigaction *) NULL) < 0)
+    return -1;
+
+  return 0;
+#else
+  errno = ENOSYS;
+  return -1;
+#endif
+}