I am trying to apply diff on two folders on the files which have same name.
I am checking name of files and then applying diff over them.
I am also calculating CKJM Metrics for them.
On running it is exiting with error code 1.
Kindly help in running CMD operations through java program .
Error : Exited with error code 1
Exited with error code 1
Exited with error code 1
Exited with error code 1
Exited with error code 1
Exited with error code 1
Exited with error code 1
Exited with error code 1
Exited with error code 1
Exited with error code 1
Exited with error code 1
Exited with error code 1
Exited with error code 1
Exited with error code 1
Exited with error code 1
Exited with error code 1
Exited with error code 1
Exited with error code 1
Exited with error code 1
Exited with error code 1
Exited with error code 1
Exited with error code 1
The common file names are [Inverse Trigono.doc, Limit _ Continuity & Differentia
bility.doc, Parabola.doc, Permutation and combination.doc, Probability.doc, Quad
ratic Equation and Expression.doc, Sequence and Series.doc, Solution of triangle
.doc, Straight Line.doc, TEST PAPER.rar, Vectors.doc]
p.s. I have gone through nearly all similar questions asked here but it seems like This is a bit different.
import java.io.BufferedReader;
import java.io.File;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
public class ListFiles111 {
public static void main(String[] args) {
// Path of Folder 1
String path1 = "C:\\Users\\hi\\Downloads\\IIT Typing\\IIT Typing";
// Path of Folder 2
String path2 = "C:\\Users\\hi\\Downloads\\IIT Typing\\IIT Typing"; 2
File folder1 = new File(path1);
File folder2 = new File(path2);
ArrayList<String> commonfiles = new ArrayList<>();
// Array list of files of folder 1 created.
List<File> filesList1 = Arrays.asList(folder1.listFiles());
// Array list of files of folder 1 created
List<File> filesList2 = Arrays.asList(folder2.listFiles());
for (File f1 : filesList1)
{
if (f1.isFile())
{
for (File f2 : filesList2)
{
if (f2.isFile() && f1.getName().equals(f2.getName()))
{
// Adding common name files in new Array list
commonfiles.add(f1.getName());
try
{
Runtime rt = Runtime.getRuntime();
String[] cmd = new String[5];
cmd[0] = "cmd.exe " ;
cmd[1] = "/C " ;
cmd[2] = "diff ";
cmd[3] = f1.getName() + " ";
cmd[4] = f2.getName();
Process pr = rt.exec( cmd );
BufferedReader input = new BufferedReader(
new InputStreamReader(pr.getInputStream()));
String line = null;
while ((line = input.readLine()) != null)
{
System.out.println(line);
}
int exitVal = pr.waitFor();
System.out.println("Exited with error code "
+ exitVal);
}
catch (Exception e)
{
System.out.println(e.toString());
e.printStackTrace();
}
try
{
Runtime rt = Runtime.getRuntime();
String[] cmdd = new String[6];
cmdd[0] = "cmd.exe " ;
cmdd[1] = "/C " ;
cmdd[2] = "java ";
cmdd[3] = "-jar ";
cmdd[4] = "C:\\Users\\hi\\Desktop\\ckjm-1.9\\build\\ckjm-1.9.jar ";
cmdd[5] = "C:\\Users\\hi\\Desktop\\*.class";
Process pr = rt.exec( cmdd );
BufferedReader input = new BufferedReader(
new InputStreamReader(pr.getInputStream()));
String line = null;
while ((line = input.readLine()) != null)
{
System.out.println(line);
}
int exitVal = pr.waitFor();
System.out.println("Exited with error code "
+ exitVal);
}
catch (Exception e)
{
System.out.println(e.toString());
e.printStackTrace();
}
}
}
}
}
System.out.println("The common file names are " + commonfiles);
}
}
Consider using ProcessBuilder instead of Runtime.exec(), it allows you a lot more control than Runtime.exec(), and will allow you to read the stdout and stderr of the utility you are calling, which will help you find the cause of your problem.
Another thing is you pass your files to your utility using File.getName() which is only going to return the name of the file itself, not its complete path. Therefore, your diff utility will interpret those file names according to its working directory, which is probably different from the folder where your files are stored. To solve this, you can either use ProcessBuilder to set the working directory before invoking your utility, or you can use File.getAbsolutePath() or File.getCanonicalPath() to pass the full path.
I'm not sure if it is relevant on Windows, but have you tried removing the trailing spaces from the arguments you pass to Runtime.exec()? Remember that you are not actually building a command string. The arguments that you pass to Runtime.exec() will be passed "as-is" to your operating system, and will end up "as-is" in the created process. in your case, this means that your OS will be looking for a binary called "cmd.exe ", which I'm pretty sure doesn't exist. Same goes for all your other parameters.
Also, Don't call "cmd.exe", call your program directly. What's the point of calling the shell and telling it to open your program. Just open the program directly.
Answering this, even though it is old because I was just looking for something similar.
The return code '1' is from cmd.exe and indicates a "partial" issue according to this https://msdn.microsoft.com/en-us/library/ms194959(v=vs.100).aspx link. It may not be getting as far as running "diff" at all. Or perhaps, as suggested above, cmd.exe cannot find the files to pass as in/output to diff. Again, this would result in diff not actually being called and the return code coming from the shell; not the diff program.
Hth
Related
I'm having trouble with ProcessBuilder not running a command on the server.
Early in my project I use Runtime.exec() just to retrieve output from a program which works fine:
private List<SatelliteCode> getSatelliteCodes() {
List<SatelliteCode> codes = new ArrayList<>();
Runtime runtime = Runtime.getRuntime();
String[] commands = { "w_scan", "-s?" };
Process process;
try {
process = runtime.exec(commands);
BufferedReader error = new BufferedReader(new InputStreamReader(process.getErrorStream()));
String s = error.readLine(); // discard first line
while ((s = error.readLine()) != null) {
s = s.trim();
int i = s.indexOf('\t'); // separated by a tab!?!?
codes.add(new SatelliteCode(s.substring(0, i), s.substring(i)));
}
} catch (IOException e) {
e.printStackTrace();
}
return codes;
}
Running this in the terminal works fine and I get all the output I need:
w_scan -fs -cGB -sS19E2 > channels.conf
However, the server needs to grab the ongoing output from the 'process.getErrorStream()' to display in the web interface. What is actually happening is the ProcessBuilder is failing and returning an exit code of 1.
The function that initialises the ProcessBuilder and to start the scan running is [EDIT 1]:
private static StringBuilder scan_error_output = null;
#Override
public boolean startSatelliteScan(String user, String country_code, String satellite_code) {
UserAccountPermissions perm = validateUserEdit(user);
if (perm == null) return false;
Shared.writeUserLog(user, Shared.getTimeStamp() +
": DVB satellite scan started " +
country_code + " - " + satellite_code +
System.lineSeparator() + System.lineSeparator());
scan_error_output = new StringBuilder();
new ScanThread(country_code, satellite_code).start();
// write out country code and satellite code to prefs file
BufferedWriter bw = null;
try {
bw = new BufferedWriter(new FileWriter(satellite_last_scan_codes));
bw.write(country_code); bw.newLine();
bw.write(satellite_code); bw.newLine();
bw.close();
} catch (IOException e) {
e.printStackTrace();
}
return true;
}
That will then run two other threads on the server, one that will run the scan itself and wait for it to finish so that it can get the final scan data. And the other which constantly updates the output from the std error stream which is then polled at intervals from the clients browser. This is much like showing the ongoing output from the terminal.
The scan thread (which fails to start the process) [EDIT 1]:
private static class ScanThread extends Thread {
private String cc, sc;
public ScanThread(String country_code, String satellite_code) {
cc = country_code;
sc = satellite_code;
}
public void run() {
ProcessBuilder pb = new ProcessBuilder("/usr/bin/w_scan",
"-fs", "-c" + cc, "-s" + sc);
pb.redirectOutput(new File(satellite_scan_file));
Process process;
try {
System.out.println("Scan thread started");
process = pb.start();
IOScanErrorOutputHandler error_output_handler = new IOScanErrorOutputHandler(process.getErrorStream());
error_output_handler.start();
int result = process.waitFor();
System.out.println(cc + " - " + sc + " - " +
"Process.waitFor() result " + result);
} catch (IOException e) {
System.out.println(e.getMessage());
e.printStackTrace();
} catch (InterruptedException e) {
System.out.println(e.getMessage());
e.printStackTrace();
}
System.out.println("Scan thread finished");
}
}
The error output stream thread which captures the output which obviously doesn't start due to the scan thread failing:
private static class IOScanErrorOutputHandler extends Thread {
private InputStream inputStream;
IOScanErrorOutputHandler(InputStream inputStream) {
this.inputStream = inputStream;
}
public void run() {
Scanner br = null;
try {
System.out.println("Scan thread Error IO capture running");
br = new Scanner(new InputStreamReader(inputStream));
String line = null;
while (br.hasNextLine()) {
line = br.nextLine();
scan_error_output.append(line + System.getProperty("line.separator"));
}
} finally {
br.close();
}
System.out.println("Scan thread Error IO capture finished");
scan_error_output = null;
}
}
And the server function which returns the std error output progress:
#Override
public String pollScanResult(String user) {
if (validateUserEdit(user) == null) return null;
StringBuilder sb = scan_error_output; // grab instance
if (sb == null) return null;
return sb.toString();
}
As mentioned above, Runtime.exec() works fine, but the ProcessBuilder is failing.
NB: I'm on Linux Mint 18.1, using Apache Tomcat 8 as the server, linux default JDK 8 and GWT 2.7 [Correction from 2.8] in Eclipse Neon.
Can anyone see what I am doing wrong?
Many thanks in advance...
[EDIT 1]
Whilst developing this on another machine, Linux Mint 17.2, JDK 8 and Apache Tomcat 7, for DVB-T, this method worked fine and polling for the scan output showed up in the client's browser.
The ProcessBuilder.start still returns 1 and an empty file is created for the output scan file.
[EDIT 2]
It appears that the reason the ProcessBuilder is failing is because the user 'tomcat8' doesn't have permissions to run 'w_scan'. 'w_scan' works from the terminal, but not from the tomcat server. Somehow I've got to fix that now.
[SOLUTIONS]
After being put in the right direction by VGR for getting the error stream from the ProcessBuilder, I started digging further and found I was getting:
main:3909: FATAL: failed to open '/dev/dvb/adapter0/frontend0': 13 Permission denied
Apache tomcat 8 didn't have permission to access the DVB-S frontend to run a scan. This was fixed in two ways:
1 - 03catalina.policy I added the extra permissions (whether they made a difference I do not know).
grant codeBase "file:/dev/dvb/-" {
permission java.io.FilePermission "file:/dev/dvb/-", "read, write";
permission java.security.AllPermission;
};
2 - The dvb frontends belong to the 'video' group. So I needed to add the user tomcat8 to that group.
usermod -a -G video tomcat8
All works for now...
You are not doing the same thing with ProcessBuilder that you’re doing with Runtime.exec, so I don't know why you think ProcessBuilder is the problem.
You have a few problems with how you’re writing the command’s output to a file.
First, the presence of ">", satellite_scan_temp_file in your ProcessBuilder command is incorrect. Output redirection is not part of any command; it is handled by a shell. But when you run with Runtime.exec or ProcessBuilder, you are not running in a shell, you are executing the process directly. Neither w_scan nor any other command considers > a special character.
The correct way to redirect to a file is with the redirectOutput method:
ProcessBuilder pb = new ProcessBuilder(
"/usr/bin/w_scan", "-fs", "-s" + satellite_code, "-c" + country_code);
pb.redirectOutput(new File(satellite_scan_temp_file));
Second, your ScanThread code is ignoring the (currently incorrect) redirect, and is attempting to read the command’s output. But there is no output, because you are redirecting it all to a file.
Once you are properly redirecting output to a file, you can remove your BufferedReader and BufferedWriter loops completely.
Finally, it is worth noting that the error output you captured probably told you that > is not a valid argument to the w_scan process.
I have a Java program created that runs VBSscripts after button clicks.
examplescript.vbs
How do I compile these vbs files and then call them to run in the program code? I've been troubleshooting for several days and can't find an answer. Once again I need to be able to run these scripts, at one point I had an input stream created to it but couldn't get it as a vbs file. Hopefully I'm overlooking something here
Edit:
This is what I currently have. With this code I receive the error "Windows Script Host. There is no script extension for file extension ".BufferedInputStream#4e34904""
ClassLoader classloader = Thread.currentThread().getContextClassLoader();
InputStream is = classloader.getResourceAsStream("hello.vbs");
try {
Runtime.getRuntime().exec("wscript " + is);
}
catch( IOException e ) {
System.out.println(e);
System.exit(0);
}
System.out.print(is);
You can run your VBScript as below.
Runtime.getRuntime().exec( "wscript path/to/examplescript.vbs" );
As already mentioned, VBScript is a script and doesn't need compiling. If you want to run code written in VBScript then you can do it this way:
This example uses VBScript to get the Motherboard Serial Number of a computer that is running Microsoft Windows:
try {
// Create a temporary script file named MBSerialxxxxxxxx.vbs
File file = File.createTempFile("MBSerial",".vbs");
// Delete the temporary file when virtual machines terminates
file.deleteOnExit();
try (FileWriter fw = new java.io.FileWriter(file)) {
String vbs = "Set objWMIService = GetObject(\"winmgmts:\\\\.\\root\\cimv2\")\n"
+ "Set colItems = objWMIService.ExecQuery _ \n"
+ " (\"Select * from Win32_BaseBoard\") \n"
+ "For Each objItem in colItems \n"
+ " Wscript.Echo objItem.SerialNumber \n"
+ " exit for ' do the first cpu only! \n"
+ "Next \n";
fw.write(vbs);
}
// Run the VBScript file....
Process p = Runtime.getRuntime().exec("cscript //NoLogo " + file.getPath());
// Read in any output to the command window.
BufferedReader input = new BufferedReader(new InputStreamReader(p.getInputStream()));
String line;
while ((line = input.readLine()) != null) {
// display the output...
System.out.println(line.trim());
}
input.close();
}
catch(IOException e){
e.printStackTrace();
}
I have a strange behavior when calling a perl script from Java.
The perl code is:
#!/usr/bin/env perl
use warnings;
print "dada\n";
$file = "settings.txt";
open $ds, "<", $file;
print "doudou\n";
while ($line = <$ds>){
print "$line\n";
last if $. == 4;
}
print "dodo\n";
close $ds;
As you can see, in this code I want to read the file "settings.txt" which contents :
1 : a
2 : b
3 : c
4 : d
And this script works when called from cygwin and the output is :
dada
doudou
1 : a
2 : b
3 : c
4 : d
dodo
But when I call it from Java using the following code:
String line;
String cmd = "perl C:\\Data\\Tests\\match_settings.pl";
try {
Process proc = Runtime.getRuntime().exec(cmd);
BufferedReader in = new BufferedReader(new InputStreamReader(proc.getInputStream()));
while ((line = in.readLine()) != null) {
System.out.println("Line :" + line);
}
in.close();
} catch (IOException a) {
// TODO Auto-generated catch block
a.printStackTrace();
}
Then when the Java function is executed, I get the output:
Line :dada
Line :doudou
Line :dodo
Which means that $line = <$ds> is not well executed, but I don't know why.
Any idea ?
Sorry for the long post, wanted to be as precise as possible.
PS : I know some of you are wondering "Why not read the settings.txt file by Java code himself ?" but that's not the question here ;)
It seems that the folder from which your perl code is executed is not the same when executing from Cygwin and Java. So the perl Script can't find your file.
You should add error checking in your perl code, and verify your current working dir directory.
I would write:
#!/usr/bin/env perl
use warnings;
use Cwd;
my $cwd = cwd();
print "dada\n";
print "In folder: $cwd";
$file = "settings.txt";
open ($ds, "<", $file) || die "Can't open settings.txt. Error code: $!";
print "doudou\n";
while ($line = <$ds>){
print "$line\n";
last if $. == 4;
}
print "dodo\n";
close $ds;
This will help you debug why, when your script is executed from Java, you don't get the expected results.
You should also redirect stderr to stdout in your Java code, so you will get error lines.
Trying to build a basic launcher for a java game. I'm building the proper command to run the application. When the following command executes in the launcher, the launcher closes as expected, but the command doesn't appear to work - either it doesn't work or the game launches and immediately crashes.
When I print this same command to the console and copy/paste it into console and execute manually, it works perfectly.
/**
*
*/
protected void launch(){
currentStatusMsg = "Launching...";
String cmd = "java -jar";
cmd += " -Djava.library.path=\"" +nativesDirectory.getAbsolutePath() + "\"";
cmd += " \""+applicationJar.getAbsolutePath() + "\"";
System.out.println(cmd);
try {
Runtime rt = Runtime.getRuntime();
Process pr = rt.exec(cmd);
//closeLauncher();
BufferedReader input = new BufferedReader(new InputStreamReader(pr.getInputStream()));
String line=null;
while((line=input.readLine()) != null) {
System.out.println(line);
}
int exitVal = pr.waitFor();
System.out.println("Exited with error code "+exitVal);
} catch(Exception e) {
System.out.println(e.toString());
e.printStackTrace();
}
}
I tried adding something to read the output, but nothing is printed.
I was originally using the following format instead, but it has the same effect:
Process pr = Runtime.getRuntime().exec(new String[]{
"java",
"-Djava.library.path=\"" +nativesDirectory.getAbsolutePath() + "\"",
"-jar",
applicationJar.getAbsolutePath()});
Update I realized I was closing the launcher before allowing the debug code to run. The system only prints: "Exited with error code 1"
I finally was able to get the subprocess error to print. It states:
Exception in thread "main" java.lang.UnsatisfiedLinkError: no lwjgl in java.library.path
However, it should be available because the command I'm executing includes the library path, and when this exact command is run manually, it works fine.
the java command launcher is not a shell. don't use quoting and space separated commands because it won't end well. put each argument into a separate String without any extra quoting, and use the exec(String[]) method.
I've been struggling for a while now with this problem and i can't seem to fix it.
i already have tried different approaches (Runtime.exec(), ProcessBuiler) but none seem to work.
This is my issue.
I have a laptop which is always on. This laptop runs a java tool connected to an arduino via usb to turn on and off the lights in the house. i have created this program myself, therefore i'm also doing some regular maintenance work on it. Recently i have added a button to restart the program from my html interface (in case i have an update, or if for some other reason i might need to restart the program or i decide to implement auto updating in the near future).
This idea behind this is to start a second instance of the application from the first instance and then System.exit(0) the first instance.
For some reason i'm not able to start a second instance of the application.
Here's some code.
public void shutdown(boolean restart) {
if (this.serial != null) {
this.serial.disconnect();
}
if (restart) {
System.out.println(this.getClass().getProtectionDomain().getCodeSource().getLocation().getPath());
String startupCommand = "java -jar \"" + this.getClass().getProtectionDomain().getCodeSource().getLocation().getPath().replace("%20", " ") + "\"";
ProcessBuilder builder = new ProcessBuilder();
// String[] command = new String[1];
// command[0] = "-jar \"" + (System.getProperty("user.dir") + "/Home_Automation_Executor.jar") + "\"";
try {
// //System.out.println("Restarting Home Automation with command: " + command[0]);
// System.out.println("Restarting Home Automation with command: " + startupCommand);
// Runtime.getRuntime().exec("bash");
// Process proc = Runtime.getRuntime().exec(startupCommand);
Process proc = builder.command(startupCommand).start();
InputStream stderr = proc.getErrorStream();
InputStreamReader isr = new InputStreamReader(stderr);
BufferedReader br = new BufferedReader(isr);
String line = null;
System.out.println("<ERROR>");
while ((line = br.readLine()) != null) {
System.out.println(line);
}
System.out.println("</ERROR>");
int exitVal = 0;
try {
exitVal = proc.waitFor();
} catch (InterruptedException ex) {
Logger.getLogger(Engine.class.getName()).log(Level.SEVERE, null, ex);
}
System.out.println("Process exitValue: " + exitVal);
} catch (IOException ex) {
ex.printStackTrace();
}
}
System.out.println("Terminating Home Automation");
System.exit(0);
}
java.io.IOException: Cannot run program "java -jar "/Users/NightWalker/Dropbox/Development/Source Code/Java/NightWare Tools/Home Automation/Home Automation Executor/dist/Home_Automation_Executor.jar"": error=2, No such file or directory
at java.lang.ProcessBuilder.start(ProcessBuilder.java:460)
at home.automation.executor.Engine.shutdown(Engine.java:186)
at home.automation.executor.webserver.HTTPGenerator._handleActionCommand(HTTPGenerator.java:190)
at home.automation.executor.webserver.HTTPGenerator._generateHTTPPage(HTTPGenerator.java:165)
at home.automation.executor.webserver.HTTPGenerator.getHTTPPage(HTTPGenerator.java:58)
at home.automation.executor.webserver.HTTPRequestHandler.run(HTTPRequestHandler.java:160)
Caused by: java.io.IOException: error=2, No such file or directory
at java.lang.UNIXProcess.forkAndExec(Native Method)
at java.lang.UNIXProcess.(UNIXProcess.java:53)
at java.lang.ProcessImpl.start(ProcessImpl.java:91)
at java.lang.ProcessBuilder.start(ProcessBuilder.java:453)
... 5 more
The problem is this:
String startupCommand = "java -jar \"" + this.getClass().getProtectionDomain().getCodeSource().getLocation().getPath().replace("%20", " ") + "\"";
/* more stuff */ builder.command(startupCommand);
This means Jav will look for a command named java -jar ...stuff with spaces.... But what you want is, that Java looks for a command named java and give that command several parameters.
You should use
/*...*/ builder.command("java", "-jar", jarLocation) /*...*/
Since it is another Java program you might want to consider running it in the same process because it's much easier to communicate between the two programs if they live in the same process. Have you tried running the command outside your program? Does it work? What does the meta-inf.mf file in the jar hold? It might be that the classpath in the meta-inf.mf file isn't relative so any dependent jars can't be found.