[JENKINS-37341] z/OS Unix System Services enablement

src/main/java/org/jenkinsci/plugins/durabletask/BourneShellScript.java

@@ -34,6 +34,7 @@
 import hudson.model.TaskListener;
 import hudson.tasks.Shell;
 import java.io.IOException;
+import java.nio.charset.Charset;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
@@ -42,10 +43,18 @@
 import java.util.concurrent.TimeUnit;
 import java.util.logging.Level;
 import java.util.logging.Logger;
+import java.io.File;
 import javax.annotation.Nonnull;
 import jenkins.model.Jenkins;
 import jenkins.security.MasterToSlaveCallable;
+import hudson.remoting.VirtualChannel;
 import org.kohsuke.stapler.DataBoundConstructor;
+import javax.annotation.CheckForNull;
+import jenkins.MasterToSlaveFileCallable;
+import org.apache.commons.io.FileUtils;
+import com.google.common.io.Files;
+
+
 
 /**
  * Runs a Bourne shell script on a Unix node using {@code nohup}.
@@ -54,7 +63,9 @@ public final class BourneShellScript extends FileMonitoringTask {
 
     private static final Logger LOGGER = Logger.getLogger(BourneShellScript.class.getName());
 
-    private static enum OsType {DARWIN, UNIX, WINDOWS}
+    private static enum OsType {DARWIN, UNIX, WINDOWS, ZOS}
+
+    private static final String SYSTEM_DEFAULT_CHARSET = "SYSTEM_DEFAULT";
 
     /** Number of times we will show launch diagnostics in a newly encountered workspace before going mute to save resources. */
     @SuppressWarnings("FieldMayBeFinal")
@@ -106,12 +117,22 @@ public String getScript() {
         if (script.isEmpty()) {
             listener.getLogger().println("Warning: was asked to run an empty script");
         }
-
+        OsType os = ws.act(new getOsType());
+        String scriptEncodingCharset = "UTF-8";
+        if(os == OsType.ZOS) {
+            Charset zOSSystemEncodingCharset = Charset.forName(ws.act(new getIBMzOsEncoding()));
+            if(SYSTEM_DEFAULT_CHARSET.equals(getCharset())) {
+                // Setting default charset to IBM z/OS default EBCDIC charset on z/OS if no encoding specified on sh step
+                charset(zOSSystemEncodingCharset);
+            }
+            scriptEncodingCharset = zOSSystemEncodingCharset.name();
+        }
+
         ShellController c = new ShellController(ws);
-
+        c.isZos = (os == OsType.ZOS);
         FilePath shf = c.getScriptFile(ws);
 
-        shf.write(script, "UTF-8");
+        shf.write(script, scriptEncodingCharset);
 
         final Jenkins jenkins = Jenkins.getInstance();
         String interpreter = "";
@@ -125,8 +146,6 @@ public String getScript() {
         String scriptPath = shf.getRemote();
         List<String> args = new ArrayList<>();
 
-        OsType os = ws.act(new getOsType());
-
         if (os != OsType.DARWIN) { // JENKINS-25848
             args.add("nohup");
         }
@@ -196,6 +215,9 @@ public String getScript() {
         /** Last-observed modification time of {@link getLogFile} on remote computer, in milliseconds. */
         private transient long checkedTimestamp;
 
+        /** Caching zOS flag to avoid round trip calls in exitStatus()         */
+        private boolean isZos;
+
         private ShellController(FilePath ws) throws IOException, InterruptedException {
             super(ws);
         }
@@ -210,7 +232,15 @@ private FilePath pidFile(FilePath ws) throws IOException, InterruptedException {
         }
 
         @Override protected Integer exitStatus(FilePath workspace, TaskListener listener) throws IOException, InterruptedException {
-            Integer status = super.exitStatus(workspace, listener);
+            Integer status;
+            if(isZos) {
+                // We need to transcode status file from EBCDIC only on z/OS platform
+                FilePath statusFile = getResultFile(workspace);
+                status = statusFile.act(new StatusCheckWithEncoding(getCharset()));
+            }
+            else {
+                status = super.exitStatus(workspace, listener);
+            }
             if (status != null) {
                 LOGGER.log(Level.FINE, "found exit code {0} in {1}", new Object[] {status, controlDir});
                 return status;
@@ -268,10 +298,50 @@ private static final class getOsType extends MasterToSlaveCallable<OsType,Runtim
               return OsType.DARWIN;
             } else if (Platform.current() == Platform.WINDOWS) {
               return OsType.WINDOWS;
+            } else if(Platform.current() == Platform.UNIX && System.getProperty("os.name").equals("z/OS")) {
+              return OsType.ZOS;  
             } else {
               return OsType.UNIX; // Default Value
             }
         }
         private static final long serialVersionUID = 1L;
     }
+
+    private static final class getIBMzOsEncoding extends MasterToSlaveCallable<String,RuntimeException> {
+        @Override public String call() throws RuntimeException {
+            // Not null on z/OS systems
+            return System.getProperty("ibm.system.encoding");
+        }
+        private static final long serialVersionUID = 1L;
+    }
+
+    /* Local copy of StatusCheck to run on z/OS   */
+    static class StatusCheckWithEncoding extends MasterToSlaveFileCallable<Integer> {
+        private final String charset;
+        StatusCheckWithEncoding(String charset) {
+            this.charset = charset;
+        }
+        @Override
+        @CheckForNull
+        public Integer invoke(File f, VirtualChannel channel) throws IOException, InterruptedException {
+            if (f.exists() && f.length() > 0) {
+                try {
+                    String fileString = Files.readFirstLine(f, Charset.forName(charset));
+                    if (fileString == null || fileString.isEmpty()) {
+                        return null;
+                    } else {
+                        fileString = fileString.trim();
+                        if (fileString.isEmpty()) {
+                            return null;
+                        } else {
+                            return Integer.parseInt(fileString);
+                        }
+                    }
+                } catch (NumberFormatException x) {
+                    throw new IOException("corrupted content in " + f + ": " + x, x);
+                }
+            }
+            return null;
+        }
+    }
 }

src/main/java/org/jenkinsci/plugins/durabletask/FileMonitoringTask.java

@@ -114,6 +114,11 @@ protected FileMonitoringController launchWithCookie(FilePath workspace, Launcher
         charset = SYSTEM_DEFAULT_CHARSET;
     }
 
+    @CheckForNull final String getCharset()
+    {
+        return charset;
+    }
+
     /**
      * Should start a process which sends output to {@linkplain FileMonitoringController#getLogFile(FilePath) log file}
      * in the workspace and finally writes its exit code to {@linkplain FileMonitoringController#getResultFile(FilePath) result file}.
@@ -161,6 +166,10 @@ protected static class FileMonitoringController extends Controller { // TODO imp
         /** @see FileMonitoringTask#charset */
         private @CheckForNull String charset;
 
+        String getCharset() {
+            return charset;
+        }
+
         /**
          * {@link #transcodingCharset} on the remote side when using {@link #writeLog}.
          * May be a wrapper for null; initialized on demand.
@@ -526,4 +535,4 @@ private static class Watcher implements Runnable {
 
     }
 
-}
+}