Merge branch 'session-cleanup' of github.com:Alexander--/Android-Terminal-Emulator into Alexander---session-cleanup

Author: jackpal

build.gradle

@@ -1,10 +1,17 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
+task wrapper (type:Wrapper) {
+    gradleVersion = '2.2.1'
+    distributionUrl = 'https://services.gradle.org/distributions/gradle-2.2.1-all.zip'
+}
+
 buildscript {
     repositories {
         jcenter()
+        mavenCentral()
     }
     dependencies {
         classpath 'com.android.tools.build:gradle:1.0.0'
+        classpath 'com.jakewharton.sdkmanager:gradle-plugin:0.12.0'
     }
 }
 
@@ -13,3 +20,12 @@ allprojects {
         jcenter()
     }
 }
+
+subprojects {
+    def androidHome
+
+    if ((androidHome = System.env.'ANDROID_HOME')
+            && (androidHome = androidHome as File).exists()
+            && androidHome.canWrite())
+        apply plugin: 'android-sdk-manager'
+}

term/src/main/java/jackpal/androidterm/BoundSession.java

@@ -4,9 +4,11 @@
 import android.text.TextUtils;
 import jackpal.androidterm.util.TermSettings;
 
-public class BoundSession extends GenericTermSession {
+class BoundSession extends GenericTermSession {
     private final String issuerTitle;
 
+    private boolean fullyInitialized;
+
     BoundSession(ParcelFileDescriptor ptmxFd, TermSettings settings, String issuerTitle) {
         super(ptmxFd, settings, true);
 
@@ -24,4 +26,16 @@ public String getTitle() {
                ? issuerTitle
                : issuerTitle + " — " + extraTitle;
     }
+
+    @Override
+    public void initializeEmulator(int columns, int rows) {
+        super.initializeEmulator(columns, rows);
+
+        fullyInitialized = true;
+    }
+
+    @Override
+    boolean isFailFast() {
+        return !fullyInitialized;
+    }
 }

term/src/main/java/jackpal/androidterm/Exec.java

@@ -36,88 +36,8 @@ public class Exec
         System.loadLibrary("jackpal-androidterm5");
     }
 
-    private static Field descriptorField;
+    static native void setPtyWindowSizeInternal(int fd, int row, int col, int xpixel, int ypixel) throws IOException;
 
-    private static void cacheDescField() throws NoSuchFieldException {
-        if (descriptorField != null)
-            return;
-
-        descriptorField = FileDescriptor.class.getDeclaredField("descriptor");
-        descriptorField.setAccessible(true);
-    }
-
-    private static int getIntFd(ParcelFileDescriptor parcelFd) throws IOException {
-        if (Build.VERSION.SDK_INT >= 12)
-            return FdHelperHoneycomb.getFd(parcelFd);
-        else {
-            try {
-                cacheDescField();
-
-                return descriptorField.getInt(parcelFd.getFileDescriptor());
-            } catch (Exception e) {
-                throw new IOException("Unable to obtain file descriptor on this OS version: " + e.getMessage());
-            }
-        }
-    }
-
-    /**
-     * Set the widow size for a given pty. Allows programs
-     * connected to the pty learn how large their screen is.
-     */
-    public static void setPtyWindowSize(ParcelFileDescriptor fd, int row, int col, int xpixel, int ypixel) {
-        // If the tty goes away too quickly, this may get called after it's descriptor is closed
-        if (!fd.getFileDescriptor().valid())
-            return;
-
-        try {
-            setPtyWindowSizeInternal(getIntFd(fd), row, col, xpixel, ypixel);
-        } catch (IOException e) {
-            // pretend that everything is ok...
-            Log.e("exec", "Failed to set window size due to " + e.getMessage());
-        }
-    }
-
-    /**
-     * Set or clear UTF-8 mode for a given pty.  Used by the terminal driver
-     * to implement correct erase behavior in cooked mode (Linux >= 2.6.4).
-     */
-    public static void setPtyUTF8Mode(ParcelFileDescriptor fd, boolean utf8Mode) {
-        // If the tty goes away too quickly, this may get called after it's descriptor is closed
-        if (!fd.getFileDescriptor().valid())
-            return;
-
-        try {
-            setPtyUTF8ModeInternal(getIntFd(fd), utf8Mode);
-        } catch (IOException e) {
-            // pretend that everything is ok...
-            Log.e("exec", "Failed to set UTF mode due to " + e.getMessage());
-        }
-    }
-
-    /**
-     * Close a given file descriptor.
-     */
-    public static void close(ParcelFileDescriptor fd) {
-        try {
-            fd.close();
-        } catch (IOException e) {
-            // ok
-        }
-    }
-
-    /**
-     * Send SIGHUP to a process group, SIGHUP notifies a terminal client, that the terminal have been disconnected,
-     * and usually results in client's death, unless it's process is a daemon or have been somehow else detached
-     * from the terminal (for example, by the "nohup" utility).
-     */
-    public static void hangupProcessGroup(int processId) {
-        TermExec.sendSignal(-processId, 1);
-    }
-
-    private static native void setPtyWindowSizeInternal(int fd, int row, int col, int xpixel, int ypixel)
-            throws IOException;
-
-    private static native void setPtyUTF8ModeInternal(int fd, boolean utf8Mode)
-            throws IOException;
+    static native void setPtyUTF8ModeInternal(int fd, boolean utf8Mode) throws IOException;
 }
 

term/src/main/java/jackpal/androidterm/GenericTermSession.java

@@ -17,8 +17,10 @@
 package jackpal.androidterm;
 
 import java.io.*;
+import java.lang.reflect.Field;
 import java.util.ArrayList;
 
+import android.os.Build;
 import android.os.Handler;
 import android.os.Message;
 import android.os.ParcelFileDescriptor;
@@ -35,10 +37,14 @@
  * A terminal session, consisting of a TerminalEmulator, a TranscriptScreen,
  * and the I/O streams used to talk to the process.
  */
-public class GenericTermSession extends TermSession {
+class GenericTermSession extends TermSession {
     //** Set to true to force into 80 x 24 for testing with vttest. */
     private static final boolean VTTEST_MODE = false;
 
+    private static Field descriptorField;
+
+    private final long createdAt;
+
     // A cookie which uniquely identifies this session.
     private String mHandle;
 
@@ -53,7 +59,7 @@ public class GenericTermSession extends TermSession {
 
     private UpdateCallback mUTF8ModeNotify = new UpdateCallback() {
         public void onUpdate() {
-            Exec.setPtyUTF8Mode(mTermFd, getUTF8Mode());
+            setPtyUTF8Mode(getUTF8Mode());
         }
     };
 
@@ -62,6 +68,8 @@ public void onUpdate() {
 
         this.mTermFd = mTermFd;
 
+        this.createdAt = System.currentTimeMillis();
+
         updatePrefs(settings);
     }
 
@@ -79,7 +87,7 @@ public void initializeEmulator(int columns, int rows) {
         }
         super.initializeEmulator(columns, rows);
 
-        Exec.setPtyUTF8Mode(mTermFd, getUTF8Mode());
+        setPtyUTF8Mode(getUTF8Mode());
         setUTF8ModeUpdateCallback(mUTF8ModeNotify);
     }
 
@@ -90,7 +98,7 @@ public void updateSize(int columns, int rows) {
             rows = 24;
         }
         // Inform the attached pty of our new size:
-        Exec.setPtyWindowSize(mTermFd, rows, columns, 0, 0);
+        setPtyWindowSize(rows, columns, 0, 0);
         super.updateSize(columns, rows);
     }
 
@@ -117,7 +125,12 @@ protected void onProcessExit() {
 
     @Override
     public void finish() {
-        Exec.close(mTermFd);
+        try {
+            mTermFd.close();
+        } catch (IOException e) {
+            // ok
+        }
+
         super.finish();
     }
 
@@ -130,7 +143,7 @@ public void finish() {
      *     unset or an empty string.
      */
     public String getTitle(String defaultTitle) {
-        String title = super.getTitle();
+        String title = getTitle();
         if (title != null && title.length() > 0) {
             return title;
         } else {
@@ -148,4 +161,76 @@ public void setHandle(String handle) {
     public String getHandle() {
         return mHandle;
     }
+
+    @Override
+    public String toString() {
+        return getClass().getSimpleName() + '(' + createdAt + ',' + mHandle + ')';
+    }
+
+    /**
+     * Set the widow size for a given pty. Allows programs
+     * connected to the pty learn how large their screen is.
+     */
+    void setPtyWindowSize(int row, int col, int xpixel, int ypixel) {
+        // If the tty goes away too quickly, this may get called after it's descriptor is closed
+        if (!mTermFd.getFileDescriptor().valid())
+            return;
+
+        try {
+            Exec.setPtyWindowSizeInternal(getIntFd(mTermFd), row, col, xpixel, ypixel);
+        } catch (IOException e) {
+            Log.e("exec", "Failed to set window size: " + e.getMessage());
+
+            if (isFailFast())
+                throw new IllegalStateException(e);
+        }
+    }
+
+    /**
+     * Set or clear UTF-8 mode for a given pty.  Used by the terminal driver
+     * to implement correct erase behavior in cooked mode (Linux >= 2.6.4).
+     */
+    void setPtyUTF8Mode(boolean utf8Mode) {
+        // If the tty goes away too quickly, this may get called after it's descriptor is closed
+        if (!mTermFd.getFileDescriptor().valid())
+            return;
+
+        try {
+            Exec.setPtyUTF8ModeInternal(getIntFd(mTermFd), utf8Mode);
+        } catch (IOException e) {
+            Log.e("exec", "Failed to set UTF mode: " + e.getMessage());
+
+            if (isFailFast())
+                throw new IllegalStateException(e);
+        }
+    }
+
+    /**
+     * @return true, if failing to operate on file descriptor deserves an exception (never the case for ATE own shell)
+     */
+    boolean isFailFast() {
+        return false;
+    }
+
+    private static void cacheDescField() throws NoSuchFieldException {
+        if (descriptorField != null)
+            return;
+
+        descriptorField = FileDescriptor.class.getDeclaredField("descriptor");
+        descriptorField.setAccessible(true);
+    }
+
+    private static int getIntFd(ParcelFileDescriptor parcelFd) throws IOException {
+        if (Build.VERSION.SDK_INT >= 12)
+            return FdHelperHoneycomb.getFd(parcelFd);
+        else {
+            try {
+                cacheDescField();
+
+                return descriptorField.getInt(parcelFd.getFileDescriptor());
+            } catch (Exception e) {
+                throw new IOException("Unable to obtain file descriptor on this OS version: " + e.getMessage());
+            }
+        }
+    }
 }

term/src/main/java/jackpal/androidterm/ShellTermSession.java

@@ -207,7 +207,16 @@ private void onProcessExit(int result) {
 
     @Override
     public void finish() {
-        Exec.hangupProcessGroup(mProcId);
+        hangupProcessGroup();
         super.finish();
     }
+
+    /**
+     * Send SIGHUP to a process group, SIGHUP notifies a terminal client, that the terminal have been disconnected,
+     * and usually results in client's death, unless it's process is a daemon or have been somehow else detached
+     * from the terminal (for example, by the "nohup" utility).
+     */
+    void hangupProcessGroup() {
+        TermExec.sendSignal(-mProcId, 1);
+    }
 }