1 files changed, 59 insertions, 0 deletions
diff --git a/cpukit/posix/src/sigsuspend.c b/cpukit/posix/src/sigsuspend.c
new file mode 100644
index 0000000000..77b6d90a29
--- /dev/null
+++ b/cpukit/posix/src/sigsuspend.c
@@ -0,0 +1,59 @@
+/*
+ *  3.3.7 Wait for a Signal, P1003.1b-1993, p. 75
+ *
+ *  COPYRIGHT (c) 1989-2004.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.com/license/LICENSE.
+ *
+ *  $Id$
+ */
+
+#if HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <assert.h>
+#include <signal.h>
+#include <errno.h>
+
+#include <rtems/system.h>
+#include <rtems/posix/pthread.h>
+#include <rtems/posix/psignal.h>
+#include <rtems/seterr.h>
+
+int sigsuspend(
+  const sigset_t  *sigmask
+)
+{
+  sigset_t            saved_signals_blocked;
+  sigset_t            current_unblocked_signals;
+  int                 status;
+  POSIX_API_Control  *api;
+
+  api = _Thread_Executing->API_Extensions[ THREAD_API_POSIX ];
+
+  /*
+   *  We use SIG_BLOCK and not SIG_SETMASK because there may be
+   *  signals which might be pending, which might get caught here.
+   *  We want the signals to be caught inside sigtimedwait.
+   */
+  status = sigprocmask( SIG_BLOCK, sigmask, &saved_signals_blocked );
+
+  current_unblocked_signals = ~(*sigmask);
+  status = sigtimedwait( &current_unblocked_signals, NULL, NULL );
+
+  (void) sigprocmask( SIG_SETMASK, &saved_signals_blocked, NULL );
+
+  /*
+   * sigtimedwait() returns the signal number while sigsuspend()
+   * is supposed to return -1 and EINTR when a signal is caught.
+   */
+  #if defined(RTEMS_DEBUG)
+    assert( status != -1 );
+  #endif
+
+  rtems_set_errno_and_return_minus_one( EINTR );
+}