Problem in executing dos command from runtime.exec(String command);

Hi
i have wriiten a code for running command of DOS-Promt
try
     rnt1 = Runtime.getRuntime();
                              proc1= rnt1.exec("myb");//myb is a batch file      and proc1 is process class instance
                                                            try
                              proc1.waitFor();
                              catch (InterruptedException e)
                         System.out.println("InterruptedException raised: "+e.getMessage());
               catch (IOException ioe)
          System.out.println("IOException raised: "+ioe.getMessage());
But it is giving error while running:
this is showing as an IO exception
CreateProcess: myb error=0
Please help me how to proceed
Thanks

There are 2 possible reasons (perhaps concurrent):
1. The file to be executed is not in the same path of your application, and you MUST specify its whole absolute path as exec() argument;
2. The file to be execute is really (as you call it) a DOS batch file, and then it HAS TO BE NAMED (and called) myb.BAT or (under NT/2000) myb.CMD; WinDOS is Not Unix (WNU): extensions rule!!!

Similar Messages

Running C++ application from Runtime.exec

Hello everybody
I am trying to run a c++ executable file(myap.exe) using Runtime.getruntime().exec("myap"), nothing happend!.
Can anyone help me please.

Where is located the file 'myapp.exe' ?
If not in directory that is in 'PATH' varable, you need to use :
Runtime.exec(String command, String[] envp, File dir)
Executes the specified string command in a separate process with the specified environment and working directory.
Floweb

Problem to execute cvs command using Runtime.exec method

Hello,
I want execute this cvs command, with this options:
cvs -d :pserver:[email protected]:/home/cvs/cvsroot rlog -S -d "2007/05/01<now" Project
I tried to execute with Runtime.exec() :
Runtime.exec("cvs -d :pserver:[email protected]:/home/cvs/cvsroot rlog -S -d \"2007/05/01<now\" Project");
But I have an error because the smaller character is interpretate as a redirection, no as a smaller symbol.
How I can do to use this command with Runtime.exec ?
Thanks.
Regards.

Sorry,
I had a typing mistake.
I want say:
Runtime.exec("cvs -d :pserver:[email protected]:/home/cvs/cvsroot rlog -S -d \"2007/05/01<now\" Project");
Regards.

Execute java class from a batch file called from runtime.exec

Hi.
I don´t know if this question fits here.
I wan´t to execute a batch file (on Win XP) with runtime.exec. That batch file will execute another java program.
I have the following code:
Resolutor.java
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
public class Resolutor {
      * @param args
     public static void main(String[] args) {
          // TODO Auto-generated method stub
          Runtime r = Runtime.getRuntime();
          //String[] command = { "cmd.exe", "/C",".\\lanzar.bat .\\ .\\ 001.res:001.dtt" };
          String[] command = { "cmd.exe", "/C",".\\tarea\\lanzar.bat " + args[0] + " " + args[1] + " " + args[2]};
          try {
               //Process proceso = Runtime.getRuntime().exec("lanzar.bat");
               Process proceso = Runtime.getRuntime().exec(command);
               InputStream stderr = proceso.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 = proceso.waitFor();
               System.out.println("EXITVAL: " + exitVal);
          } catch (IOException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
          } catch (InterruptedException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
}lanzar.bat
java Lanzador %1 %2 %3Lanzador.java
import java.util.Vector;
public class Lanzador {
      * @param args
     public static void main(String[] args) {
          // TODO Auto-generated method stub
          Repetitiva rpt=new Repetitiva();
          String rutaFicheros=args[0];
          String rutaResultado=args[1];
          String[] ficheros=args[2].split(":");
          Vector<String> ficheroDatos=new Vector<String>();
          for(int i=0;i<ficheros.length;i++){
               ficheroDatos.add(ficheros);
               System.out.println(ficheros[i]);
          System.out.println("RUTA DE FICHEROS: " + rutaFicheros);
          System.out.println("RUTA DE RESULTADOS: " + rutaResultado);
          System.out.println("CALCULAR");
          rpt.setRepetitiva(ficheroDatos, rutaFicheros, rutaResultado);
          rpt.calcular();
}I´ve got Resolutor.class in /res and the other two files (and the rest of the files for running) in /res/tarea.
If I execute /res/tarea/lanzar.bat from the command line everything works fine, it calls java and runs lanzador without problem.
The problem comes when I try to execute the batch file via Resolutor.class. It executes the batch file without problem, but it throws a *java.lang.NoClassDefFoundError: Lanzador* when launching the new java application.
Any ideas of how can I solve that problem. (It must do it via batch file).

Well, I tried putting in the bat file java -classpath .\tarea Lanzador %1 %2 %3 and didn´t work.
I ve tried the bat modification, and the directory in x.txt is k:\res instead of k:\res\tarea.
I´ve tried to modifiy it to java .\tarea\Lanzador and didn´t work so I have put a cd like the following and it appears to work.
cd tarea
java Lanzador %1 %2 %3Thanks for the replies.

Executing Batch files from Runtime.getRuntime().exec

Can we execute batch files from Runtime.getRuntime().exec() method.
Regards,
Nalini

hi,
import java.io.IOException;
class BatchFileTest{
     public static void main(String args[]){
          try{
          Runtime r = Runtime.getRuntime();
          Process p = r.exec("startcmd.bat");
          catch(IOException en){
               en.printStackTrace();
-Regards
Manikantan

Accesing environment variables from Runtime.exec()

Hi All,
I have a problem for which I need help. I have a property BLAH set to "abc" in my ~/.bashrc. My programme looks as following.
Runtime rt = Runtime.getRuntime();
String command="java -Dext.prop=${BLAH} Test1";
//Even following also dont work I removed curly braces
// String command="java -Dext.prop=$BLAH Test1";
try {
rt.exec(command);
} catch (IOException e) {
e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
I just want to set the value of environment variable to a property "ext.prop" and in class Test1 I would like to access it as System.getProperty("ext.prop"). The problem is that the value of System.getProperty("ext.prop") is $BLAH instead of "abc" which I set in my ~/.bashrc.
If I execute the same command ("java -Dext.prop=${BLAH} Test1") from command prompt then I don't have any problem. I tried in another way also that is
Edited by: ragsger on Dec 22, 2008 12:59 PM
Edited by: ragsger on Dec 22, 2008 1:00 PM

Replacing $BLAH with the value of the environment variable BLAH is handled by the shell and since you don't call a shell, you'll have to do that on your own.
System.getenv("BLAH") will get the value.

Return from Runtime.exec()

Hello all,
I am executing a Windows 2000 command using Runtime.exec() which establishes a connection using "rasdial" to a remote server. However the exec method returns immediately, before the "rasdial" command has had a chance to complete. Does anyone know of a method which executes an OS command but waits for the command to finish before returning? Something like System would be ideal.
Any help is appreciated,
Regards,
Jason

In Java version 1.3 (and later) method exec() of class Runtime returns a Process instance when invoked. The process object returned is what you need to manage.

Rsync from Runtime.exec

I'm trying to run following command with Runtime.exec:
rsync -auz sourceHost:'path1 path2' tmpSo I have following code to run this command:
command[0] = "rsync";
command[1] = "-auz";
command[2] = "sourceHost:'path1 path2'";
command[3] = "tmp";
Runtime rt = Runtime.getRuntime();
Process proc = rt.exec(command);
InputStream stdin = proc.getErrorStream();
InputStreamReader isr = new InputStreamReader(stdin);
BufferedReader br = new BufferedReader(isr);
String line = null;
while ( (line = br.readLine()) != null) {
      System.out.println(line);
stdin = proc.getInputStream();
isr = new InputStreamReader(stdin);
br = new BufferedReader(isr);
line = null;
while ( (line = br.readLine()) != null) {
      System.out.println(line);
int exitVal;
try {
      exitVal = proc.waitFor();
} catch (InterruptedException e) {
      throw new IOException(e.getMessage());
if (exitVal != 0) {
      throw new IOException("Exit value was " + exitVal + " that means an error occured" +
          " during rsync call");
}What happens is that when I run the code rsync gives me following error:
rsync: link_stat "path1 path2" failed: No such file or directory (2)
rsync error: some files could not be transferred (code 23) at main.c(812)
client: nothing to do: perhaps you need to specify some filenames or the --recursive option?
java.io.IOException: Exit value was 23 that means an error occured during rsync call
        at RSyncTest.rsyncBinaryData(RSyncTest.java:156)
        at RSyncTest.main(RSyncTest.java:80)Can anyone think of what's wrong here?
Regards and Thanks,
David

In Java version 1.3 (and later) method exec() of class Runtime returns a Process instance when invoked. The process object returned is what you need to manage.

Parameter to shell script using Runtime.exec(string)

Hi all, ( Speciall hi to dheeraj tak )
Briefly : How do i pass an arguement to a non - java executible being called using Runtime.exec.
In detail : i am using Runtime.exec to call a shell script : The code is as follows:
String callAndArgs[] = {"/home/tom/jakarta-tomcat-4.1.24/webapps/dash/script.sh"};
try {
Runtime rt = Runtime.getRuntime();
Process child = rt.exec(callAndArgs);
This works properly & calls the shell script which in turn invokes some other executible (c file).
$HOME/midi/test/build/bin/<C-EXECUTIBLE>
Here i am specifying the name (say hello.exe ) . So far so good.
I want to make this happen dynamiclaly. so i need to pass the name of the executible as a parameter to the script.
To pass a parameter i hav to change the string to :-
String callAndArgs[] = {"/home/tom/jakarta-tomcat-4.1.24/webapps/dash/script.sh <C-EXECUTIBLE HERE>"};
and the script to
$HOME/midi/test/build/bin/$1 --- where $1 refers to argument 1. (C-EXECUTIBLE AGAIN).
This is giving an IO - Execption. Plz help
Code will be very helpful.
Thanx in advance

some 1 plz tell me the difference :-
This is the documentation of Runtime.exec that i found :-
1> exec
public Process exec(String command) throws IOException
Executes the specified string command in a separate process.
The command argument is parsed into tokens and then executed as a command in a separate process. This method has exactly the same effect as exec(command, null).
Parameters:
command - a specified system command
Complete refernce says : Process (String progName) ----- Executes a program specified by programname as a seperate process.
2> exec
public Process exec(String cmdarray[]) throws IOException
Executes the specified command and arguments in a separate process.
The command specified by the tokens in cmdarray is executed as a command in a separate process. This has exactly the same effect as exec(cmdarray, null).
Parameters:
cmdarray - array containing the command to call and its arguments.
Complete reference says : Process exec(String comLineArray[]) ---- Executes the command line specified bythe string in comLineArray as a seperate process.
This means that there is provision 4 command line arguments...
how do u use it then????????????????????????????

PB with Runtime.exec(String);

hi,
in using Runtime.exec(string);
he say :
the method exec(java.lang.String) from the type java.long.Runtime is not static.
Someone can help me please.

use:
Runtime.getRuntime().exec(String);

Feedback from runtime.exec(command)

Hi,
I hope someone can point out the problem with the following. I have a method that is supposed to execute a shell command. The shell command would look something like the following:
serctl add 351 password [email protected]
However when this command is executed in a shell/command line a prompt is shown ("MySql password:")asking for a password. Once the user enters the password, the user is added. My code currently executes the first half of the command but gets stuck on the password prompt. My code stops by the line "before the loop" and never enters the inner loop. So obviously my code isn't working properly to say that if the response is a password prompt, to pass it the password variable.
Any ideas?
Many Thanks.
void addUser(String username, String password, String email, String passwd, HttpServletResponse response) throws IOException {
   String[] command = {"serctl", "add", username, password, email};
   //String[] command = {"pstree"};
   Runtime runtime = Runtime.getRuntime();
   Process process = null;
   response.setContentType(CONTENT_TYPE);
   PrintWriter out = response.getWriter();
   String s = "something";
   try {
     process = runtime.exec(command);
     System.out.println("Process is: " + process);
     System.out.println("Command is: " + command);
     BufferedReader in =
     new BufferedReader(new InputStreamReader(process.getInputStream()));
     BufferedReader error = new BufferedReader(new InputStreamReader(process.getErrorStream()));
     OutputStream stdout = process.getOutputStream();
     System.out.println("before the loop");
     s=in.readLine();
     System.out.println(s);
     System.out.println(s);
     System.out.println(in);
     System.out.println(stdout);
     //while((s=in.readLine())!= null)
     while((s=in.readLine()).equals("MySql password: "))
       //s = in.readLine();
       System.out.println(in.readLine());
       System.out.println(s);
       out.println(s);
       if (s.equals("MySql password: ")) {
         System.out.println("Must be equal to MySql password;");
         //stdout.write(passwd.getBytes());
         //stdout.write(adminpassword);
         //stdout.flush();
         //break;
    System.out.println("after the loop");
     System.out.println("Here is the standard error of the command(if any):\n");
     while ((s = error.readLine()) != null){
       System.out.println(s);
     stdout.close();
     in.close();
     error.close();
     out.println(in);
     out.println("<html>");
     out.println("<body bgcolor=\"#FFFCCC\">");
     out.println("You have successfully added a new user.<br><br>");
     out.println("User " + username + " has been created ");
     out.println("</body></html>");
    catch (Exception e) {
          System.out.println("Uh oh! Error adding new user.");
          e.printStackTrace();
}

Just a random observation:
Sometimes programs that prompt for passwords do it in a way that is impossible to redirect (or at least requires special trickery, such as creating a pseudo-TTY). E.g. in Unix this involves opening /dev/tty and using that instead of stdout & stdin. This is done to make sure there really is a person who knows the password sitting there in front of the teletype.
I don't know if the "serctl" program does that. If stdout&stdin redirection does not appear to work then it is a possibility.
A quick googling for "serctl" reveals:
Commands labeled with (*) will prompt for a MySQL password.
If the variable PW is set, the password will not be prompted.
which might or might not be an easier way to deal with this particular program. If it indeed is the same "serctl" program.

Running System commands using Runtime.exec()

I'm trying to run an example from "The Java Programming Language" book by Arnold, Gosling and Holmes. I'm trying to run a system level command and get the results. The code looks like:
public static String[] runCommand(String cmd) {
String[] outputData= null;
String[] cmdArray = {"/usr/bin/ls", "-l", "/tmp"};
try {
Process child = Runtime.getRuntime().exec(cmdArray);
InputStream in = child.getInputStream();
InputStreamReader reader = new InputStreamReader(output);
BufferedReader = new BufferedReader(reader);
// read the commands output
int counter = 0;
String line;
while ((line = input.readLine()) != null)
outputData[counter++]= line;
if (child.waitFor() != 0){ // error when it's not 0
System.out.println("Couldn't run the command.");
System.out.println("It produced the following error message : " + child.exitValue());
outputData = null;
} catch (Exception e){
System.out.println("It got here!");
System.out.println("It produced the following error message : " + e.getMessage());
outputData = null;
return outputData;
It gets to the while line, trys to run the input.readLine() and kicks out the exception that looks like:
It got here!
It produced the following error message : null
I know it gets to the input.readLine() because I had a whole lot more try blocks in there, but for simplicity left it out (so it look like the code in the book, which I tried originally). When I run the same command from the command line (on our Sun Solaris 2.8 system) I get results back. I'm not sure what I'm doing wrong. Any help would be greatly appreciated. Thanks.

Hi, duffymo, hope you can help me. Consider this servlet code:
String theCommand = "csh /export/home/gls03/sasstuff/runsas.csh /export/home/g
ls03/sasstuff/gary2.sas";
//Create a parent Process for the sas program subprocess:
Process p = rt.exec(theCommand);
System.out.println("after call to rt.exec(theCommand)");
Here is the runsas.csh script:
#!/bin/csh
setenv LD_LIBRARY_PATH /opt/sybase/lib:/usr/lib:/usr/openwin/lib:/opt/SUNWspro/S
C2.0.1
setenv SASROOT /usr/local/CDC/SAS_8.2
setenv XKEYSYMDB /usr/local/CDC/SAS_8.2/X11/resource_files/XKeysymDB
$SASROOT/sas -sasuser /hpnpages/cgi-bin/applinks/hospcap/tmp $1
The execution never gets to the println statment, here is the error:
class java.io.IOException Exception. Message: CreateProcess: csh /export/home/g
ls03/sasstuff/runsas.csh /export/home/gls03/sasstuff/gary2.sas error=2
java.io.IOException: CreateProcess: csh /export/home/gls03/sasstuff/runsas.csh /
export/home/gls03/sasstuff/gary2.sas error=2
at java.lang.Win32Process.create(Native Method)
at java.lang.Win32Process.<init>(Win32Process.java:66)
at java.lang.Runtime.execInternal(Native Method)
at java.lang.Runtime.exec(Runtime.java:551)
at java.lang.Runtime.exec(Runtime.java:477)
at java.lang.Runtime.exec(Runtime.java:443)
at sasRunnerNew.doPost(sasRunnerNew.java:103)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubIm
pl.java:262)
at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:21)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.ja
va:27)
at us.ny.state.health.hin.hinutil.HinFilter.doFilter(HinFilter.java:124)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.ja
va:27)
at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppSe
rvletContext.java:2643)
at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestIm
pl.java:2359)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:139)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)
The command runs fine in unix.
I've also tried using these as arguments to exec:
String theCommand = "/bin/csh /export/home/gls03/sasstuff/runsas.csh /export/home/gls03/sasstuff/gary2.sas";
String[] theCommand = {"csh", "/export/home/gls03/sasstuff/runsas.csh", "/export/home/gls03/sasstuff/gary2.sas"};
These generate the same error. I'm thinking this is a sas-specific problem.
Thanks for any help. Gary

Make can't recursively call Make when run from Runtime.exec (for some user)

This one is a little complicated. The afflicted platform is Mac OS X. It works fine on Linux, it seems, and even then, it does work for some Mac OS X users...
First, the setup. I have a Java program that has to call GNU Make. Then, GNU Make will recursively call Make in some subdirectories. This results in the following Java code:
String make = "make"; //on windows, I have this swapped with "mingw32-make"
String workDir = ...; //this is programmatically detected to be the same folder that the parent Makefile is in
Runtime.getRuntime().exec(make,null,workDir);This calls make on a Makefile which has the following line early on to be executed (this is only a snippet from the makefile):
cd subdirectory && $(MAKE)When I fetch the output from the make command, I usually get what I expect: It cd's to the directory and it recursively calls make and everything goes smoothly.
However, for one particular user, using Mac OS X, he has reported the following output:
cd subdirectory && make
/bin/sh: make: command not found
make: *** [PROJNAME] Error 127Which is like, kinda hurts my head... make can't find make, apparently.
I've gotten some suggestions that it might be due to the "cd" command acting wonky. I've gotten other suggestions that it may be some strange setup with the env variables (My Mac developer is implementing a fix/workaround for 'environ', which is apparently posix standard, but Mac (Mr. Posix Compliance...) doesn't implement it. When he finishes that, I'll know whether it worked or not, but I get the feeling it won't fix this problem, since it's intended for another area of code entirely...
Also worth mentioning, when the user calls "make" from the terminal in said directory, it recurses fine, getting past that particular line. (Later on down the road he hits errors with environ, which is what my aforementioned Mac dev is working on). Although calling "make" by hand is not an ideal solution here.
Anyways, I'm looking for someone who's fairly knowledgeable with Runtime.exec() to suggest some way to work around this, or at least to find out that perhaps one of the User's settings are wonked up and they can just fix it and have this working... that'd be great too.
-IsmAvatar

YoungWinston
YoungWinston wrote:
IsmAvatar wrote:
However, for one particular user, using Mac OS X, he has reported the following output:One particular user, or all users on Mac OS?In this case, I have two mac users. One is reporting that all works fine. The other is reporting this problem.
cd subdirectory && make
/bin/sh: make: command not found
make: *** [PROJNAME] Error 127Which is like, kinda hurts my head... make can't find make, apparently.If that is being reported on the command line, then I'd say that make wasn't being found at all.If make isn't being found, then who's interpreting the Makefile?
It's also just possible that the make script on Mac isn't correctly exporting its PATH variable, though it seems unlikely, since this would surely have been reported as a bug long ago.
I've gotten some suggestions that it might be due to the "cd" command acting wonky...Also seems unlikely. 'cd' has been around since shortly after the K-T extinction event.
WinstonBy "acting wonky", I mean being given a bad work directory or some such, such that it's not changing to the intended directory.
Andrew Thompson
Andrew Thompson wrote:
(shudder) Read and implement all the recommendations of "When Runtime.exec() won't" (http://www.javaworld.com/jw-12-2000/jw-1229-traps.html).
Already read it. I already know the dreadful wonders of Runtime.exec. But in this case, it's been working fine for us up until one Mac user reported that make can't find make.
Also, why are you still coding for Java 1.4? If you are not, use a ProcessBuilder, which takes a small part of the pain out of dealing with processes.Usually I do use a ProcessBuilder. I noticed that it usually delegates to Runtime.exec() anyways, and seeing as I didn't need any of the additional functionality, I decided to just use Runtime.exec() in this particular case.
jschell
jschell wrote:
So print thos env vars, in your app and when the user does it.I'll look into that. It's a good start.
-IsmAvatar

External commands in runtime exec

Im trying to run commands from the Sleuthkit in a java GUI. These commands have no problem running from the konsole as all the paths etc. have been set up, but when I try to run them with the java runtime exec() they wont work. Similarly,i run standard linux commands in this gui aswell and they run without problem.
Any ideas whats weong?
Thanks.

You didn't tell us exactly what you're doing.Its a forensic GUI that runs konsole based commands
and displays the ouput in a JText areaThat tells us nothing useful. By "exactly what you're doing," I mean the Java code and the command it's exec()ing.
>
You didn't tell us what "doesn't work" means.The 'basic' linux commands work fine in the gui, its
just the sleuthkit ones that wont run or return
anything when executed using the runtime exec(). Even
though running these commands in a konsole works
fine. THis means all paths have been set.
Any ideas on a different way to run them or should I
include more than just the command used on the
konsole?That still doesn't tell us what "doesn't work" means.
My previous response still applies.

UNIX Problem with method Runtime exec(String[],String[],File)

Hello !!
i'm french
scuse my english
I got a probleme with method exec(String[],String[],File) of Runtime Class
i don't have any probleme when my program runs on Windows NT but the same program on UNIX doesnt execute my command..
When i use exec(String[]) methode i dont have this problem ...but i need the second one methode because i have to execute my command in a different directory than the JAVA program.
I need that results of this command are placed in this drectory so that i can't use an exex() like that :
exemple with a perl :
"perl /toto/titi/hello.pl"
I want to execute this :
"perl hello.pl" (and hello.pl is placed in /toto/titi)
Conclusion :
the exec(String[],String[],File) solution is ok with NT ...
but with UNIX ????
Is there other solution ??
Should i do a "cd" command before my execution ? how can i do this ??
Thanks !!!!

Could you post your source code (only relevant part)
Raghu

Problem in executing dos command from runtime.exec(String command);

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