src/java.base/unix/native/libjava/Console_md.c

rev 51515 : 8209937: Enhance java.io.Console - provide methods to query console width and height
Contributed-by: christoph.langer@sap.com, matthias.baesken@sap.com

*** 1,7 ****
  /*
!  * Copyright (c) 2005, 2006, 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
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
--- 1,7 ----
  /*
!  * Copyright (c) 2005, 2018, 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
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
*** 25,39 ****
  
  #include "jni.h"
  #include "jni_util.h"
  #include "jvm.h"
  #include "java_io_Console.h"
- 
  #include <stdlib.h>
  #include <unistd.h>
  #include <termios.h>
  
  JNIEXPORT jboolean JNICALL
  Java_java_io_Console_istty(JNIEnv *env, jclass cls)
  {
      return isatty(fileno(stdin)) && isatty(fileno(stdout));
  }
--- 25,62 ----
  
  #include "jni.h"
  #include "jni_util.h"
  #include "jvm.h"
  #include "java_io_Console.h"
  #include <stdlib.h>
+ #include <sys/ioctl.h>
+ #include <sys/resource.h>
  #include <unistd.h>
  #include <termios.h>
  
+ JNIEXPORT jint JNICALL
+ Java_java_io_Console_width(JNIEnv *env, jobject this)
+ {
+     struct winsize w;
+ 
+     if (ioctl(0, TIOCGWINSZ, &w) == 0 || ioctl(1, TIOCGWINSZ, &w) == 0 || ioctl(2, TIOCGWINSZ, &w) == 0) {
+         return w.ws_col;
+     }
+     return -1;
+ }
+ 
+ JNIEXPORT jint JNICALL
+ Java_java_io_Console_height(JNIEnv *env, jobject this)
+ {
+     struct winsize w;
+ 
+     if (ioctl(0, TIOCGWINSZ, &w) == 0 || ioctl(1, TIOCGWINSZ, &w) == 0 || ioctl(2, TIOCGWINSZ, &w) == 0) {
+         return w.ws_row;
+     }
+     return -1;
+ }
+ 
  JNIEXPORT jboolean JNICALL
  Java_java_io_Console_istty(JNIEnv *env, jclass cls)
  {
      return isatty(fileno(stdin)) && isatty(fileno(stdout));
  }