8285987: executing shell scripts without #! fails on Alpine linux

Reviewed-by: mdoerr, goetz

Author: MBaesken

test/jdk/java/lang/ProcessBuilder/Basic.java

@@ -486,15 +486,15 @@ public static void main(String args[]) throws Throwable {
                             equal(run(pb).exitValue(),
                                   False.exitValue());
                             // Traditional shell scripts without #!
-                            setFileContents(prog, "exec /bin/true\n");
-                            prog.setExecutable(true);
-                            equal(run(pb).exitValue(),
-                                  True.exitValue());
-                            prog.delete();
-                            setFileContents(prog, "exec /bin/false\n");
-                            prog.setExecutable(true);
-                            equal(run(pb).exitValue(),
-                                  False.exitValue());
+                            if (!(Platform.isLinux() && Platform.isMusl())) {
+                                setFileContents(prog, "exec /bin/true\n");
+                                prog.setExecutable(true);
+                                equal(run(pb).exitValue(), True.exitValue());
+                                prog.delete();
+                                setFileContents(prog, "exec /bin/false\n");
+                                prog.setExecutable(true);
+                                equal(run(pb).exitValue(), False.exitValue());
+                            }
                             prog.delete();
                         }
 
@@ -511,14 +511,16 @@ public static void main(String args[]) throws Throwable {
                         pb.command(cmd);
 
                         // Test traditional shell scripts without #!
-                        setFileContents(dir1Prog, "/bin/echo \"$@\"\n");
-                        pb.command(new String[] {"prog", "hello", "world"});
-                        checkPermissionDenied(pb);
-                        dir1Prog.setExecutable(true);
-                        equal(run(pb).out(), "hello world\n");
-                        equal(run(pb).exitValue(), True.exitValue());
-                        dir1Prog.delete();
-                        pb.command(cmd);
+                        if (!(Platform.isLinux() && Platform.isMusl())) {
+                            setFileContents(dir1Prog, "/bin/echo \"$@\"\n");
+                            pb.command(new String[] {"prog", "hello", "world"});
+                            checkPermissionDenied(pb);
+                            dir1Prog.setExecutable(true);
+                            equal(run(pb).out(), "hello world\n");
+                            equal(run(pb).exitValue(), True.exitValue());
+                            dir1Prog.delete();
+                            pb.command(cmd);
+                        }
 
                         // If prog found on both parent and child's PATH,
                         // parent's is used.

test/langtools/jdk/jshell/ExternalEditorTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2022, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -25,6 +25,8 @@
  * @test
  * @summary Testing external editor.
  * @bug 8143955 8080843 8163816 8143006 8169828 8171130 8162989 8210808
+ * @comment musl/Alpine has problems executing some shell scripts, see 8285987
+ * @requires !vm.musl
  * @modules jdk.jshell/jdk.internal.jshell.tool
  * @build ReplToolTesting CustomEditor EditorTestBase
  * @run testng ExternalEditorTest

test/lib/jdk/test/lib/Platform.java

@@ -189,6 +189,19 @@ public static String getVMVersion() {
         return vmVersion;
     }
 
+    public static boolean isMusl() {
+        try {
+            ProcessBuilder pb = new ProcessBuilder("ldd", "--version");
+            pb.redirectErrorStream(true);
+            Process p = pb.start();
+            BufferedReader b = new BufferedReader(new InputStreamReader(p.getInputStream()));
+            String l = b.readLine();
+            if (l != null && l.contains("musl")) { return true; }
+        } catch(Exception e) {
+        }
+        return false;
+    }
+
     public static boolean isAArch64() {
         return isArch("aarch64");
     }