1 files changed, 117 insertions, 0 deletions
diff --git a/lib/libpthread/thread/thr_sigaction.c b/lib/libpthread/thread/thr_sigaction.c
new file mode 100644
index 0000000..694f37e
--- /dev/null
+++ b/lib/libpthread/thread/thr_sigaction.c
@@ -0,0 +1,117 @@
+/*
+ * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by John Birrell.
+ * 4. Neither the name of the author nor the names of any co-contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+#include <signal.h>
+#include <errno.h>
+#include <pthread.h>
+#include "thr_private.h"
+
+__weak_reference(_sigaction, sigaction);
+
+int
+_sigaction(int sig, const struct sigaction * act, struct sigaction * oact)
+{
+	int ret = 0;
+	int err = 0;
+	struct sigaction newact, oldact;
+	struct pthread *curthread;
+	kse_critical_t crit;
+
+	/* Check if the signal number is out of range: */
+	if (sig < 1 || sig > _SIG_MAXSIG) {
+		/* Return an invalid argument: */
+		errno = EINVAL;
+		ret = -1;
+	} else {
+		if (act)
+			newact = *act;
+
+		crit = _kse_critical_enter();
+		curthread = _get_curthread();
+		KSE_LOCK_ACQUIRE(curthread->kse, &_thread_signal_lock);
+
+		oldact = _thread_sigact[sig - 1];
+
+		/* Check if a signal action was supplied: */
+		if (act != NULL) {
+			/* Set the new signal handler: */
+			_thread_sigact[sig - 1] = newact;
+		}
+
+		/*
+		 * Check if the kernel needs to be advised of a change
+		 * in signal action:
+		 */
+		if (act != NULL && sig != SIGINFO) {
+
+			newact.sa_flags |= SA_SIGINFO;
+
+			/*
+			 * Check if the signal handler is being set to
+			 * the default or ignore handlers:
+			 */
+			if (newact.sa_handler != SIG_DFL &&
+			    newact.sa_handler != SIG_IGN) {
+				/*
+				 * Specify the thread kernel signal
+				 * handler:
+				 */
+				newact.sa_handler = (void (*) ())_thr_sig_handler;
+			}
+			/* Change the signal action in the kernel: */
+			if (__sys_sigaction(sig, &newact, NULL) != 0) {
+				_thread_sigact[sig - 1] = oldact;
+				/* errno is in kse, will copy it to thread */
+				err = errno;
+				ret = -1;
+			}
+		}
+		KSE_LOCK_RELEASE(curthread->kse, &_thread_signal_lock);
+		_kse_critical_leave(crit);
+		/*
+		 * Check if the existing signal action structure contents are
+		 * to be returned: 
+		*/
+		if (oact != NULL) {
+			/* Return the existing signal action contents: */
+			*oact = oldact;
+		}
+		if (ret != 0) {
+			/* Return errno to thread */
+			errno = err;
+		}
+	}
+
+	/* Return the completion status: */
+	return (ret);
+}