From 1d8f5f2ea3651e1c11ac5bb2256940cc7587ab0d Mon Sep 17 00:00:00 2001
From: tv <tv@NetBSD.org>
Date: Wed, 9 Aug 2000 20:20:49 +0000
Subject: [PATCH] Pretend to do something useful (just fill in oldsigaction
 with SIG_IGN and zeroes) if the mapped signal number comes up zero. 
 Previously, sigaction1() would return an error, confusing some linux apps
 trying to set handlers for "all" signals.

---
 sys/compat/linux/common/linux_sigaction.c | 17 ++++++++++++-----
 sys/compat/linux/common/linux_signal.c    | 17 ++++++++++++-----
 2 files changed, 24 insertions(+), 10 deletions(-)

diff --git a/sys/compat/linux/common/linux_sigaction.c b/sys/compat/linux/common/linux_sigaction.c
index 4fc165a18b92..90148d96e816 100644
--- a/sys/compat/linux/common/linux_sigaction.c
+++ b/sys/compat/linux/common/linux_sigaction.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: linux_sigaction.c,v 1.19 2000/03/30 11:27:17 augustss Exp $	*/
+/*	$NetBSD: linux_sigaction.c,v 1.20 2000/08/09 20:20:49 tv Exp $	*/
 
 /*-
  * Copyright (c) 1995, 1998 The NetBSD Foundation, Inc.
@@ -91,10 +91,17 @@ linux_sys_sigaction(p, v, retval)
 	sig = SCARG(uap, signum);
 	if (sig < 0 || sig >= LINUX__NSIG)
 		return (EINVAL);
-	error = sigaction1(p, linux_to_native_sig[sig],
-	    SCARG(uap, nsa) ? &nbsa : 0, SCARG(uap, osa) ? &obsa : 0);
-	if (error)
-		return (error);
+	if (sig > 0 && !linux_to_native_sig[sig]) {
+		/* Pretend that we did something useful for unknown signals. */
+		obsa.sa_handler = SIG_IGN;
+		sigemptyset(&obsa.sa_mask);
+		obsa.sa_flags = 0;
+	} else {
+		error = sigaction1(p, linux_to_native_sig[sig],
+		    SCARG(uap, nsa) ? &nbsa : 0, SCARG(uap, osa) ? &obsa : 0);
+		if (error)
+			return (error);
+	}
 	if (SCARG(uap, osa)) {
 		native_to_linux_old_sigaction(&obsa, &olsa);
 		error = copyout(&olsa, SCARG(uap, osa), sizeof(olsa));
diff --git a/sys/compat/linux/common/linux_signal.c b/sys/compat/linux/common/linux_signal.c
index 951627ef7dea..26233b35973b 100644
--- a/sys/compat/linux/common/linux_signal.c
+++ b/sys/compat/linux/common/linux_signal.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: linux_signal.c,v 1.28 2000/07/28 21:49:09 tron Exp $	*/
+/*	$NetBSD: linux_signal.c,v 1.29 2000/08/09 20:20:49 tv Exp $	*/
 /*-
  * Copyright (c) 1995, 1998 The NetBSD Foundation, Inc.
  * All rights reserved.
@@ -344,10 +344,17 @@ linux_sys_rt_sigaction(p, v, retval)
 	sig = SCARG(uap, signum);
 	if (sig < 0 || sig >= LINUX__NSIG)
 		return (EINVAL);
-	error = sigaction1(p, linux_to_native_sig[sig],
-	    SCARG(uap, nsa) ? &nbsa : NULL, SCARG(uap, osa) ? &obsa : NULL);
-	if (error)
-		return (error);
+	if (sig > 0 && !linux_to_native_sig[sig]) {
+		/* Pretend that we did something useful for unknown signals. */
+		obsa.sa_handler = SIG_IGN;
+		sigemptyset(&obsa.sa_mask);
+		obsa.sa_flags = 0;
+	} else {
+		error = sigaction1(p, linux_to_native_sig[sig],
+		    SCARG(uap, nsa) ? &nbsa : NULL, SCARG(uap, osa) ? &obsa : NULL);
+		if (error)
+			return (error);
+	}
 	if (SCARG(uap, osa)) {
 		native_to_linux_sigaction(&obsa, &olsa);
 		error = copyout(&olsa, SCARG(uap, osa), sizeof(olsa));