ssh/test: add port for aix/ppc64

Fixes golang/go#31413

Change-Id: I52105280a2237f23cd91b8ec92fd89cf62564572
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/171917
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

ssh/test/session_test.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !windows,!solaris,!aix,!js
+// +build !windows,!solaris,!js
 
 package test
 
@@ -13,6 +13,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"runtime"
 	"strings"
 	"testing"
 
@@ -217,6 +218,11 @@ func TestKeyChange(t *testing.T) {
 }
 
 func TestInvalidTerminalMode(t *testing.T) {
+	if runtime.GOOS == "aix" {
+		// On AIX, sshd cannot acquire /dev/pts/* if launched as
+		// a non-root user.
+		t.Skipf("skipping on %s", runtime.GOOS)
+	}
 	server := newServer(t)
 	defer server.Shutdown()
 	conn := server.Dial(clientConfig())
@@ -234,6 +240,11 @@ func TestInvalidTerminalMode(t *testing.T) {
 }
 
 func TestValidTerminalMode(t *testing.T) {
+	if runtime.GOOS == "aix" {
+		// On AIX, sshd cannot acquire /dev/pts/* if launched as
+		// a non-root user.
+		t.Skipf("skipping on %s", runtime.GOOS)
+	}
 	server := newServer(t)
 	defer server.Shutdown()
 	conn := server.Dial(clientConfig())
@@ -278,6 +289,11 @@ func TestValidTerminalMode(t *testing.T) {
 }
 
 func TestWindowChange(t *testing.T) {
+	if runtime.GOOS == "aix" {
+		// On AIX, sshd cannot acquire /dev/pts/* if launched as
+		// a non-root user.
+		t.Skipf("skipping on %s", runtime.GOOS)
+	}
 	server := newServer(t)
 	defer server.Shutdown()
 	conn := server.Dial(clientConfig())
@@ -351,7 +367,7 @@ func testOneCipher(t *testing.T, cipher string, cipherOrder []string) {
 		t.Fatalf("NewSession: %v", err)
 	}
 
-	out, err := session.Output(fmt.Sprintf("dd if=/dev/zero of=/dev/stdout bs=%d count=1", numBytes))
+	out, err := session.Output(fmt.Sprintf("dd if=/dev/zero bs=%d count=1", numBytes))
 	if err != nil {
 		t.Fatalf("Output: %v", err)
 	}