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-rw-r--r--cpukit/posix/src/sigaction.c93
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diff --git a/cpukit/posix/src/sigaction.c b/cpukit/posix/src/sigaction.c
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+/*
+ * 3.3.4 Examine and Change Signal Action, P1003.1b-1993, p. 70
+ *
+ * COPYRIGHT (c) 1989-1999.
+ * 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 <pthread.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>
+#include <rtems/score/isr.h>
+
+/*
+ * PARAMETERS_PASSING_S is defined in ptimer.c
+ */
+
+extern void PARAMETERS_PASSING_S (int num_signal, const struct sigaction inf);
+
+int sigaction(
+ int sig,
+ const struct sigaction *act,
+ struct sigaction *oact
+)
+{
+ ISR_Level level;
+
+ if ( oact )
+ *oact = _POSIX_signals_Vectors[ sig ];
+
+ if ( !sig )
+ rtems_set_errno_and_return_minus_one( EINVAL );
+
+ if ( !is_valid_signo(sig) )
+ rtems_set_errno_and_return_minus_one( EINVAL );
+
+ /*
+ * Some signals cannot be ignored (P1003.1b-1993, pp. 70-72 and references.
+ *
+ * NOTE: Solaris documentation claims to "silently enforce" this which
+ * contradicts the POSIX specification.
+ */
+
+ if ( sig == SIGKILL )
+ rtems_set_errno_and_return_minus_one( EINVAL );
+
+ /*
+ * Evaluate the new action structure and set the global signal vector
+ * appropriately.
+ */
+
+ if ( act ) {
+
+ /*
+ * Unless the user is installing the default signal actions, then
+ * we can just copy the provided sigaction structure into the vectors.
+ */
+
+ _ISR_Disable( level );
+ if ( act->sa_handler == SIG_DFL ) {
+ _POSIX_signals_Vectors[ sig ] = _POSIX_signals_Default_vectors[ sig ];
+ } else {
+ _POSIX_signals_Clear_process_signals( sig );
+ _POSIX_signals_Vectors[ sig ] = *act;
+ }
+ _ISR_Enable( level );
+ }
+
+ /*
+ * No need to evaluate or dispatch because:
+ *
+ * + If we were ignoring the signal before, none could be pending
+ * now (signals not posted when SIG_IGN).
+ * + If we are now ignoring a signal that was previously pending,
+ * we clear the pending signal indicator.
+ */
+
+ return 0;
+}