Method exec

ij/src/main/java/ij/macro/Functions.java:5346–5401

()

	}

	String exec() {
		String[] cmd;
		StringBuffer sb = new StringBuffer(256);
		String arg1 = getFirstString();
		if (interp.nextToken()==',') {
			Vector v = new Vector();
			v.add(arg1);
			do
				v.add(getNextString());
			while (interp.nextToken()==',');
			cmd = new String[v.size()];
			v.copyInto((String[])cmd);
		} else
			cmd = Tools.split(arg1);
		interp.getRightParen();
		boolean openingDoc = cmd.length==2&&cmd[0].equals("open") || cmd.length==5&&cmd[3].equals("excel.exe");
		if (openingDoc&&IJ.isWindows()) {
			String path = cmd[1];
			if (path.startsWith("http://")||path.startsWith("HTTP://")) {
				cmd = new String[4];
				cmd[2] = "start";
				cmd[3] = path;
			} else {
				cmd = new String[3];
				cmd[2] = path;
			}
			cmd[0] = "cmd";
			cmd[1] = "/c";
		}
		BufferedReader reader = null;
		try {
			Process p = Runtime.getRuntime().exec(cmd);
			boolean returnImmediately = openingDoc || !waitForCompletion;
			waitForCompletion = true;
			if (returnImmediately){
				handleProcessBuffers(p.getInputStream(), p.getErrorStream()); // empty both buffers
				return null;
			} else {
				handleProcessBuffers(p.getErrorStream()); // empty only unused ErrorStream buffer
			}
			reader = new BufferedReader(new InputStreamReader(p.getInputStream())); // notice that this function will discard all process error output
			String line; int count=1;
			while ((line=reader.readLine())!=null)  {
        		sb.append(line+"\n");
        		if (count++==1&&line.startsWith("Microsoft Windows")){
					handleProcessBuffers(p.getInputStream()); // must empty the InputStream buffer anyway
					break; // user probably ran 'cmd' without /c option
				}
        	}
		} catch (Exception e) {
    		sb.append(e.getMessage()+"\n");
		} finally {
			if (reader!=null) try {reader.close();} catch (IOException e) {}
		}
		return sb.toString();
	}

	double getValue() {