--- Libc/Libc-1725.40.4/sys/sigaction.c
+++ Libc/Libc-262/sys/sigaction.c
@@ -1,60 +1,89 @@
 /*
- * Copyright (c) 1999-2017 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
  *
  * @APPLE_LICENSE_HEADER_START@
  * 
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * The contents of this file constitute Original Code as defined in and
+ * are subject to the Apple Public Source License Version 1.1 (the
+ * "License").  You may not use this file except in compliance with the
+ * License.  Please obtain a copy of the License at
+ * http://www.apple.com/publicsource and read it before using this file.
  * 
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * This Original Code and all software distributed under the License are
+ * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
+ * License for the specific language governing rights and limitations
+ * under the License.
  * 
  * @APPLE_LICENSE_HEADER_END@
  */
+/*
+ * Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved
+ *
+ *	@(#)sigaction.c	1.0
+ */
 
-#if __has_include(<CrashReporterClient.h>)
-#include <CrashReporterClient.h>
-#else
-#define CRSetCrashLogMessage(...)
-#endif
-#include <stdlib.h>
-#include <stdio.h>
-#include <unistd.h>
+#include <sys/syscall.h>
 #include <signal.h>
 #include <sys/signal.h>
 #include <errno.h>
 
-#pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wstrict-prototypes"
+/*
+ *	Intercept the sigaction syscall and use our signal trampoline
+ *	as the signal handler instead.  The code here is derived
+ *	from sigvec in sys/kern_sig.c.
+ */
 
-extern int __platform_sigaction (int sig,
-		const struct sigaction * __restrict nsv,
-		struct sigaction * __restrict osv);
+#if defined(__DYNAMIC__)
+extern int __in_sigtramp;
+#endif
+
+static int
+sigaction__ (sig, nsv, osv, bind)
+        int sig;
+	register struct sigaction *nsv, *osv;
+        int bind;
+{
+	struct sigaction vec;
+	void (*prevsig)();
+	extern void _sigtramp();
+	struct __sigaction sa;
+	struct __sigaction *sap;
+
+	if (sig <= 0 || sig >= NSIG || sig == SIGKILL || sig == SIGSTOP) {
+	        errno = EINVAL;
+	        return (-1);
+	}
+	sap = (struct __sigaction *)0;
+	if (nsv) {
+		sa.sa_handler = nsv->sa_handler;
+		sa.sa_tramp = _sigtramp;
+		sa.sa_mask = nsv->sa_mask;
+		sa.sa_flags = nsv->sa_flags;	
+		sap = &sa;
+	        if (nsv->sa_handler != (void (*)())SIG_DFL && nsv->sa_handler != (void (*)())SIG_IGN) {
+#ifdef __DYNAMIC__
+                    if (bind && (__in_sigtramp == 0))				// XXX
+		  _dyld_bind_fully_image_containing_address(nsv->sa_handler);
+#endif
+	        }
+	}
+	if (syscall (SYS_sigaction, sig, sap, osv) < 0) {
+	        return (-1);
+	}
+	return (0);
+}
+
 
 int
-sigaction (int sig, const struct sigaction * __restrict nsv,
-		struct sigaction * __restrict osv)
+sigaction (sig, nsv, osv)
+        int sig;
+	register const struct sigaction *nsv;
+        register struct sigaction *osv;
 {
-	int ret = __platform_sigaction(sig, nsv, osv);
-#ifdef FEATURE_SIGNAL_RESTRICTION
-	// Note: The "sig != 0" here is to force the compiler to maintain that "sig"
-	// is live, and in a register, after __sigaction so it is visible in the
-	// crashing register state.
-	if (ret == -1 && errno == ENOTSUP && sig != 0) {
-		CRSetCrashLogMessage("sigaction on fatal signals is not supported");
-		__builtin_trap();
-	}
-#endif
-	return ret;
+    return sigaction__(sig, nsv, osv, 1);
 }
 
 // XXX
@@ -66,8 +95,7 @@
 	register const struct sigaction *nsv;
         register struct sigaction *osv;
 {
-    return sigaction(sig, nsv, osv);
+    return sigaction__(sig, nsv, osv, 0);
 }
 #endif
 
-#pragma clang diagnostic pop