Process via Runtime.getRuntime().exec(), how to identify that it�s closed?
A process(console program) is started via Runtime.getRuntime().exec() from Swing Application.
Swing Application need to know the result of this process.
So, is there any possibility to find whether the console program is finished?
Runtime.exec() returns a Process object.
Look at its methods, especially waitFor(). Read carefully the whole Process documentation, especially what has to be done with the output streams.
Similar Messages
-
Output of Process p=Runtime.getRuntime().exec("java filename
Runtime r=Runtime.getRuntime();
Process p=r.exec("java <filename>");
on implementing this code no exception is fired
nor there is any output on console window rather the console window
doesn't open.
can anyone help
2nd question:
Runtime r=Runtime.getRuntime();
Process p=r.exec("cmd.exe dir");
on executing it in windows xp it shows cannot open 16-bit windows applicationRuntime r=Runtime.getRuntime();
Process p=r.exec("java <filename>");
InputStream is = p.getInputStream();The standard output stream of the programm, you are starting, is the input stream of your process. -
If i run program via Runtime.getRuntime().exec, UrlConnection doesn't work.
I have two pograms.
One GUI which allow us directly runs server application and display output.
Two server application which operates with http.
Under Windows XP operation system everything works fine. If i run server application via comand like " java -jar **** " , everything works fine. But if i run server application via GUI under Win2000, server application doesn't work. Application freeze if try to get output stream from Url connection.
Can you help me please?
url = new URL("http://neco");
connection = (HttpURLConnection)url.openConnection();
connection.setRequestMethod("POST");
connection.setDoInput(true);
connection.setDoOutput(true);
connection.setAllowUserInteraction(true);
connection.setReadTimeout(10);
connection.setUseCaches(false);
// Right There !!!
output = new DataOutputStream(connection.getOutputStream());It is probably because the getOutputStream() or getErrorStream() of Process is blocked waiting for you to read from those streams.
See http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.htmlIn short read from getOutputStream() from its own thread and also read from getErrorStream in another thread. If you are using 1.5 you can use ProcessBuilder and combine the OutputStream and ErrorStream into one stream and then you just need one thread. For you information, in 1.5 Runtime.exec() just call through to ProcessBuilder. -
How to get return value from Java runtime.getRuntime.exec?
I'm running shell commands from an Oracle db (11gr2) on aix.
But, I would like to get a return value from a shell comand... like you get with "echo $?"
I use a code like
CREATE OR REPLACE JAVA SOURCE NAMED common."Host" AS
import java.io.*;
public class Host {
public static int executeCommand(String command) {
int retval=0;
try {
String[] finalCommand;
finalCommand = new String[3];
finalCommand[0] = "/bin/sh";
finalCommand[1] = "-c";
finalCommand[2] = command;
final Process pr = Runtime.getRuntime().exec(finalCommand);
pr.waitFor();
catch (Exception ex) {
System.out.println(ex.getLocalizedMessage());
retval=-1;
return retval;
/but I do not get a return value... because I don't know how to get return value..
Edited by: user9158455 on 22-Sep-2010 07:33Hi,
Have your tried pr.exitValue() ?
I think you also need a finally block that destroys the subprocess
Regards
Peter -
Kill "runtime.getruntime().exec"-generated processes with control-c?
Hi there,
In my java program I create 2 processes with "runtime.getruntime().exec", but when I stop my java program pressing control-c these 2 processes remains running and I have to kill them using linux command "kill".
How can I program my code in order to kill these 2 processes when stopping my java program with control-c?
I tried next but it didn't work for me:
try {
final Process proc = Runtime.getRuntime().exec ( "java ControlCProblemDemo" );
Runtime.getRuntime().addShutdownHook(
new Thread(){
public void run(){
proc.destroy();
while ( true );
} catch( IOException ioe ) {
System.err.println( ioe );
}Thank you very much in advance.
Josuéso are you saying proc.destroy() does nothing?
are you sure it's getting executed?
is there an error?
too little info here -
Using Process Runtime.getRuntime().exec
http://im1.shutterfly.com/procserv/47b4d633b3127cceb46774c84ee80000001610
Here is a URL to a part of the current process I need to run. Actually there are 4 steps that preceed these but they are ran in order and must be done before these (that part is easy). Sorry it kinda chopped off the left side a little bit.
My question is, can I do this entirely using Runtime.getRuntime().exec() commands or do I need to involve multi threading. The reason I am asking is because P13 cannot run until P8 and P9 completes, but that shouldn't stop the rest of the program from running.
If I have something like
Process P4 = Runtime.getRuntime().exec(P4);
Process P5 = Runtime.getRuntime().exec(P2);
// Some handling for the streams of these processes goes here
P4.waitFor();
P2.waitFor();
if(P2.exitValue() != 0){
Process P5 = Runtime.getRuntime().exec(P5);
Process P6 = Runtime.getRuntime().exec(P6);
// Some handling for the streams of these processes goes here
Does that mean the whole program will stop and wait until P4 is done before even checking for P2? If P2 is finished would the program continue and run P5 and P6 even if P4 is still running or will it wait for P4 to complete also. P4 has nothing to do with P2?
Also any advice ???P4 and P2 will both be running in parallel (or as much as your OS and hardware allows them to be). As soon as both are done, and regardless of which finishes first, whatever follows P2.waitFor() will execute.
If you have multiple groups of processes, where the processes within a group must execute sequentially, but the groups themselves can run independently of each other, then you'll need to either use Java's threads, or wrap each group of sequential processes in a shell script or batch file the executes that group sequentially.
If there are complex dependencies among the groups--that is, multiple groups must wait on the same process, or one group must wait for multiple other groups, then it might be easier to control the concurrency in Java. -
Runtime.getRuntime.exec() not working when Tomcat is made a windows Sevice
Hi,
I am working on a web application which launches a exe file on subitting the form. I am using Apache Tomcat 4.0.6 to run the web application. Initially Tomcat was not made a windows service on my machine and when I launch an exe it is launching without any problems. I used the following command to launch the exe file:
<code>
Process p = Runtime.getRuntime().exec("C:\\Program Files\\Mercury Interactive\\WinRunner\\arch\\wrun.exe" + strWROptions);
</code>
The above command launches WinRunner on the local machine.
without using tomcat if I just compile and run a test program with this command, the exe is launching perfectly. But, Once I made tomcat a windows service on my machine the exe is not launching.
Also, a process is being created in the windows task bar named wrun.exe once I submit the form but WinRunner is not lauching on the desktop.
Can any one please help and suggest me.
Thanks,
RameshThe version of Java I am using is 1.4.2. Even without
using the string array as you mentioned, the exe
(wrun.exe) is launched on my desktop if I don't run
Tomcat as a windows service. But the problem arises on
making it a service :-(
That is strange because going by the documentation what you have been using should never work. I can't test it though, I'm not on MSWindows at the moment..
Now, when I use this string array convention, I am
getting an error saying "The tool could not launch..
some error occured".
That's not a Java error message, it must come from WinRunner. This means that you have succesfully started WinRunner (great!) but something else is wrong; maybe the parameters you pass to it are incorrect.
How would you run it on the command line? Like this?wrun -t "D:\L5_QE\L5A\Initial" -create_text_report on -runThat line executes the wrun program and passes it five parameters, not three. The first parameter is "-t", the second "D:\L5_QE\L5A\Initial", the third "-create_text_report", the fourth "on", and the fifth "-run". The array of strings that corresponds to that line isString[] command = {"C:\\Program Files\\Mercury Interactive\\WinRunner\\arch\\wrun.exe",
"-t", "D:\\L5_QE\\L5A\\Initial",
"-create_text_report", "on",
"-run"}; -
Runtime.getRuntime().exec problems
i am trying to run files from my java application, i use the following command
Runtime.getRuntime().exec("cmd /c start " + filePath);but it seems that it cant handle file path with spaces, like
C:\Documents and Settings\Administrator\My Documents\My Web\Untitled-3.fla
it works well with path like this
C:\Downloads\1.rar
am i right? and how to solve this problem? thanksfinal String[] command =
"cmd.exe",
"/C",
"start \"" + filename + "\"",
final Process p = Runtime.getRuntime().exec(command);this method can only trigger files in the same folder as the java application, isnt it? -
Using Runtime.getRuntime().exec(DOS Program) with Windows 2000.
I am trying to spawn a DOS Program from within Java.
On Win95/98/ME, I use
Process p = Runtime.getRuntime().exec("START /w command.com con /c myDOSProgram.exe");
This works on these platforms. On Win 2000, I use
Process p = Runtime.getRuntime().exec("START /w cmd.exe con /c myDOSProgram.exe");
It does not work at all.
I have tried all combinations of using START, cmd.exe, con /c, etc.
I can spawn a Windows App using
Process p = Runtime.getRuntime().exec("windows.exe");
And it works fine.
What does it take to spawn a DOS program from Java on the Windows 2000 op sys?Hi. I recently wrote a java GUI that calls a DOS program with mixed success. Here's the code I used to make the call:String osName = System.getProperty("os.name" );
String[] cmd = new String[4];
if( osName.equals( "Windows 2000" ) || osName.equals( "Windows NT" ) )
cmd[0] = "cmd.exe";
cmd[1] = "/C" ;
cmd[2] = "VBDoc.exe";
cmd[3] = fileName;
else if( osName.equals( "Windows 95" ) || osName.equals( "Windows 98" ) )
cmd[0] = "command.com" ;
cmd[1] = "/C" ;
cmd[2] = "VBDoc.exe";
cmd[3] = fileName;
else
System.out.println(osName);
Process proc = runtime.exec(cmd);Check out this article, it gives a good explanation of how to use the exec() call:
http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html
Hope this helps! -
Runtime.getRuntime().exec portability problem
Hello everyone!
I've got a problem with running external application (in my case it's pdfLaTeX). The code looks as follows:
System.out.println(AppConfig.getExeFile() + " " + params); // AppConfig.getExeFile() is a static function that outputs a String object.
Process p = Runtime.getRuntime().exec(AppConfig.getExeFile() + " " + params); // params is a String object as well.
p.waitFor();
// ...On Linux everything works great. System.out.println() outputs the following line:
/opt/texlive/bin/pdflatex -halt-on-error -output-directory /tmp /tmp/tabular.texThe application executes successfully.
However, I can't get my program to run on Windows. In this case, the generated command looks as follows:
"C:\Program Files\LaTeX\MiKTeX 2.7\miktex\bin\pdflatex.exe" -halt-on-error -output-directory C:\DOCUME~1\Roman\USTAWI~1\Temp C:\DOCUME~1\Roman\USTAWI~1\Temp\tabular.texAfter displaying this line, my application freezes. The child process (pdflatex.exe) is frozen as well. Then I kill both processes.
Here's the PdfLaTeX's log file after failure:
{C:/Documents and Settings/All Users/Dane aplikacji/MiKTeX/2.7/pdftex/config/pd
ftex.map}
!pdfTeX error: (file C:/Documents and Settings/All Users/Dane aplikacji/MiKTeX
/2.7/pdftex/config/pdftex.map): fflush() failed
==> Fatal error occurred, no output PDF file produced!and here's how it should look like:
{C:/Documents and Settings/All Users/Dane aplikacji/MiKTeX/2.7/pdftex/config/pd
ftex.map}] (tabular.aux) )
Here is how much of TeX's memory you used:
202 strings out of 95340
2116 string characters out of 1183965
46926 words of memory out of 1500000
3474 multiletter control sequences out of 110000
3640 words of font info for 14 fonts, out of 1200000 for 2000
14 hyphenation exceptions out of 8191
23i,6n,17p,173b,100s stack positions out of 5000i,500n,10000p,200000b,5000s
<C:/Program Files/LaTeX/MiKTeX 2.7/fonts/type1/bluesk
y/cm/cmr10.pfb>
Output written on tabular.pdf (1 page, 10003 bytes).
PDF statistics:
10 PDF objects out of 1000 (max. 8388607)
0 named destinations out of 1000 (max. 131072)
1 words of extra memory for PDF output out of 10000 (max. 10000000)I suspected that the problem was caused by presence of spaces in command (I've tried several other solutions such as putting parameters into String[] array, escaping, adding double-quotes, putting the command to the batch file), but when I run my the same command from the command line, everything works fine.
I believe that I'm making some kind of a stupid mistake because it doesn't look like it's pdfLaTeX's fault.
Thanks in advance for your hints. Solutions are welcome as well ;-)Hi,
What is probably happening is that the process is being blocked because you are not reading the output.
This is a common problem with exec.
Read this article:
http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html
HTH,
Eugenio Alvarez -
Runtime.getRuntime().exec problems running with applet
Hi,
I am running the command
Process prc = Runtime.getRuntime().exec("net config workstation");
InputStream in = prc.getInputStream();
BufferedReader br = new BufferedReader(new InputStreamReader(in));
line = br.readLine();
When running from an application(/stand alone program) on Win-NT it runs fine. But when i include the same code in an Applet and try to run.
It doesnt return any thing. I see the DOS-prompt open and close and i can also see the required output generated on the DOS prompt, but the program doesnt return any results(null) in the InputStream.
I even tried to get the ErrorStream incase it is writing some error but it doesnt write anything.
I tried running some other commands like (cmd.exe /c set) which were able to run on both application as well as from the applet.
I have tried giving the "net config workstation" command in all flavors
String[] cmd = new String[3];
cmd[0] = "cmd.exe";
cmd[1] = "/C";
cmd[2] = "net config workstation";
And
String[] cmd = new String[3];
cmd[0] = "net.exe";
cmd[1] = "config";
cmd[2] = "workstation";
AND
String[] cmd = new String[5];
cmd[0] = "cmd.exe";
cmd[1] = "/C";
cmd[2] = "net.exe";
cmd[3] = "config";
cmd[4] = "workstation";
AND giing the full path as
C:\winnt\system32\net.exe config workstation
But still it doesnt work.
Can anybody please suggest what is the problem.Its Urgent.....
Well the purpose of this is to get users system properties like the Logon Domain , server name etc.... or else can anybody suggest a better way to obtain this information.....
Your reply will be highly appriciated...
Thanks in Advance......Thanks for atleast replying.....
Sorry, i forgot to mention.... yes OfCourse, i am using an Signed Applet..... That how i was able to run the "set" command.....
I have made sure it is not sucha simple problem..... the thing is as i have mentioned i know that even "net config workstation" works..... cause i see the output on the DOS prompt,.... but this output is not returned to the Applet in the getInputStream()/getErrorStream().....
Can anybody please suggest a way to get this output..... OR is there some other way to get the machine's domain, server name etc info from the machine....?????
Thanks in Advance...!! -
Runtime.getRuntime().exec() and Garbage Collection
I am programming a piece of software in both Java and C that has some strict real time requirements. Garbage collection, which pauses all threads in Java, sometimes causes loss of incoming data. In order to get around this, I am thinking to start another process using Runtime.getRuntime().exec("c_program") and using interprocess controls (in a UNIX environment) to retrieve data from the new process.
My only worry is that the Process created by the above call would be a child process of whatever JVM thread created it, (as far as I understand, the JVM implementation in Unix uses multiple processes) and would also be paused when garbage collection occurs. Does anyone know the implementation of the exec functionality and the JVM well enough to say that this will or will not happen?
Thanks in advance,
BenjaminYou're going to create a whole new process? I don't
know what a "child process" means, but Runtime.exec()
gets the operating system to produce an entirely new
process, outside the JVM. However if it produces
output on stdout or stderr, you're going to have
threads in your JVM that read that output, otherwise
that process will hang.
Why is your idea better than just calling the C
program via JNI?Thank you both for your replies. My plan was to create a whole new process, yes. In UNIX, a process C is created by another process P using fork() or the exec() family. Process P is then the parent of process C, and process C is the child of Process P. P has an amount of control over C since it can send various signals to pause, kill, etc to C.
My concern was that the JVM implementation would use these signals to implement the pause of all threads before garbage collecting. If it did, it may also pause the Process that it spawned from the Runtime.exec() call. Pausing my C program in this manner would cause the loss of data I was trying to avoid in the first place.
My plan for the new process was not to produce anything on stdout or stderr, but to pass data back to the JVM using ipc (interprocess communication) resources of UNIX. I would have to use the JNI to access these resources.
The whole reason for wanting to do this is to avoid the pause during garbage collection that all Java Threads experience. If I were just to call the C program through the JNI with a normal Java Thread as I think you were suggesting, this Java Thread would still be paused during garbage collection.
To the second reply about RTSJ, I had heard about this but couldn't find info about it! Thanks for the link. I'm checking it out at the moment. The java runtime must be considerably different for the specifications I see that they guarantee.
Again, thanks for the replies,
Benjamin -
Problem in Runtime.getRuntime().exec
Hi,
I am trying to start the tomcat server through a java application.Before starting the server,i need to run a batch file for setting up some classpaths.I am able to run the batch file and start the server,but its opening the 2 windows.How do i suppress it?
One more problem is how do i stop the server?
Code is:
import java.io.*;
public class Test
public static void main(String args[]) {
try {
Process p = Runtime.getRuntime().exec("cmd /c start C:\\soap.bat");
p.destroy();
Process p1 = Runtime.getRuntime().exec("cmd /c start C:\\jakarta-tomcat-3.2.1\\bin\\startup");
//p.waitFor();
Thread.sleep(10000);
p1.destroy();
BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()));
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(p.getOutputStream()));
bw.write("1");
bw.flush();
String line;
while ((line = br.readLine()) != null) {
System.out.println(line);
br.close();
bw.close();
System.out.println(p.exitValue());
catch(Exception e) {
System.out.println(e);
I need the help as early as possible.
pls cc reply to:[email protected]
Thanks
AnithaSoln. to your first prob:
1) To have the other DOS window closed, click on the extreme left-top corner of that window. In the menu that drops down ,select properties.In the properties window make sure the 'close on Exit' check Box is checked. Apply the changes.
2) To stop the server u need to call the shutdown.bat file in the tomcat\bin dir. If u want to do this thru java then call the shutdown.bat file from your Runtime.exec() method. Same as u did for the startup file
Hope this helps. -
Strange behaviour of Runtime.getRuntime().exec(command)
hello guys,
i wrote a program which executes some commands in commandline (actually tried multiple stuff.)
what did i try?
open "cmd.exe" manually (administrator)
type "echo %PROCESSOR_ARCHITECTURE%" and hit enter, which returns me
"AMD64"
type "java -version" and hit enter, which returns me:
"java version "1.6.0_10-beta"
Java(TM) SE Runtime Environment (build 1.6.0_10-beta-b25)
Java HotSpot(TM) 64-Bit Server VM (build 11.0-b12, mixed mode)"
type "reg query "HKLM\SOFTWARE\7-zip"" returns me:
HKEY_LOCAL_MACHINE\SOFTWARE\7-zip
Path REG_SZ C:\Program Files\7-Zip\
i wrote two functions to execute an command
1) simply calls exec and reads errin and stdout from the process started:
public static String execute(String command) {
String result = "";
try {
// Execute a command
Process child = Runtime.getRuntime().exec(command);
// Read from an input stream
InputStream in = child.getInputStream();
int c;
while ((c = in.read()) != -1) {
result += ((char) c);
in.close();
in = child.getErrorStream();
while ((c = in.read()) != -1) {
result += ((char) c);
in.close();
} catch (IOException e) {
return result;
}the second function allows me to send multiple commands to the cmd
public static String exec(String[] commands) {
String line;
String result = "";
OutputStream stdin = null;
InputStream stderr = null;
InputStream stdout = null;
// launch EXE and grab stdin/stdout and stderr
try {
Process process;
process = Runtime.getRuntime().exec("cmd.exe");
stdin = process.getOutputStream();
stderr = process.getErrorStream();
stdout = process.getInputStream();
// "write" the parms into stdin
for (int i = 0; i < commands.length; i++) {
line = commands[i] + "\n";
stdin.write(line.getBytes());
stdin.flush();
stdin.close();
// clean up if any output in stdout
BufferedReader brCleanUp = new BufferedReader(
new InputStreamReader(stdout));
while ((line = brCleanUp.readLine()) != null) {
result += line + "\n";
brCleanUp.close();
// clean up if any output in stderr
brCleanUp = new BufferedReader(new InputStreamReader(stderr));
while ((line = brCleanUp.readLine()) != null) {
result += "ERR: " + line + "\n";
brCleanUp.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return result;
}so i try to execute the commands from above (yes, i am using \\ and \" in java)
(1) "echo %PROCESSOR_ARCHITECTURE%"
(2) "java -version"
(3) "reg query "HKLM\SOFTWARE\7-zip""
the first function returns me (note that ALL results are different from the stuff above!):
(1) "" <-- empty ?!
(2) java version "1.6.0_11"
Java(TM) SE Runtime Environment (build 1.6.0_11-b03)
Java HotSpot(TM) Client VM (build 11.0-b16, mixed mode, sharing)
(3) ERROR: The system was unable to find the specified registry key or value.
the second function returns me:
(1) x86 <-- huh? i have AMD64
(2) java version "1.6.0_11"
Java(TM) SE Runtime Environment (build 1.6.0_11-b03)
Java HotSpot(TM) Client VM (build 11.0-b16, mixed mode, sharing)
(3) ERROR: The system was unable to find the specified registry key or value.
horray! in this version the java version is correct! processor architecture is not empty but totally incorrect and the reg query is still err.
any help is wellcome
note: i only put stuff here, which returns me strange behaviour, most things are working correct with my functions (using the Runtime.getRuntime().exec(command); code)
note2: "reg query "HKLM\HARDWARE\DESCRIPTION\System\CentralProcessor\0" /t REG_SZ" IS working, so why are "some" queries result in ERR, while they are working if typed by hand in cmd.exe?ok, i exported a jar file and execute it from cmd:
java -jar myjar.jar
now the output is:
(1) "" if called by version 1, possible to retrieve by version 2 (no clue why!)
(2) "java version "1.6.0_10-beta"
Java(TM) SE Runtime Environment (build 1.6.0_10-beta-b25)
Java HotSpot(TM) 64-Bit Server VM (build 11.0-b12, mixed mode)"
(3) C:\Program Files\7-Zip\
so all three problems are gone! (but its a hard way, as i need both functions and parse a lot of text... :/ )
thanks for the tip, that eclipse changes variables (i really did not knew this one...) -
PROBLEM in executing a shell command through Runtime.getRuntime().exec()
Hi all,
I was trying to execute the following code:
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.Statement;
import java.sql.ResultSet;
* Created on Mar 13, 2007
* To change the template for this generated file go to
* Window>Preferences>Java>Code Generation>Code and Comments
* @author 195092
* To change the template for this generated type comment go to
* Window>Preferences>Java>Code Generation>Code and Comments
public class ClassReportDeleteDaemon {
ClassReportDeleteDaemon()
public static void main(String[] args) throws Exception
Connection conn = null;
Statement stmt = null;
ResultSet rs;
String strQuery = null;
String strdaysback = null;
String delstring = null;
int daysback;
try
System.out.println("REPORT DELETION ::: FINDING DRIVER");
Class.forName("oracle.jdbc.driver.OracleDriver");
catch(Exception e)
System.out.println("REPORT DELETION ::: DRIVER EXCEPTION--" + e.getMessage());
System.out.println("REPORT DELETION ::: DRIVER NOT FOUND");
try
String strUrl = "jdbc:Oracle:thin:" + args[0] + "/" + args[1] + "@" + args[2];
System.out.println("REPORT DELETION ::: TRYING FOR JDBC CONNECTION");
conn = DriverManager.getConnection(strUrl);
System.out.println("REPORT DELETION ::: SUCCESSFUL CONNECTION");
while(true)
System.out.println("WHILE LOOP");
stmt = conn.createStatement();
strQuery = "SELECT REP_DAYS_OLD FROM T_REPORT_DEL";
rs = stmt.executeQuery(strQuery);
while(rs.next())
strdaysback = rs.getString("REP_DAYS_OLD");
//daysback = Integer.parseInt(strdaysback);
System.out.print("NO of Days===>" + strdaysback);
delstring = "find /tmp/reports1 -name " + "\"" + "*" + "\"" + " -mtime +" + strdaysback + " -print|xargs rm -r";
System.out.println("DELETE STRING===>" + delstring);
Process proc = Runtime.getRuntime().exec(delstring);
//Get error stream to display error messages encountered during execution of command
InputStream errStream=proc.getErrorStream();
//Get error stream to display output messages encountered during execution of command
InputStream inStream = proc.getInputStream();
InputStreamReader strReader = new InputStreamReader(errStream);
BufferedReader br = new BufferedReader(strReader);
String strLine = null;
while((strLine=br.readLine())!=null)
System.out.println(strLine);
} //end of while loop
} //end of try
catch (Exception e)
System.out.println("REPORT DELETION ::: EXCEPTION---" + e.getMessage());
conn.close();
} //end of main
} //end of ClassReportDeleteDaemon
But it is giving the error "BAD OPTION -print|xargs". The command run well in shell.
Please help.
Thanking u.......Since the pipe '|' is interpreted by the shell then you need the shell to invoke your command
String[] command = {"sh","-c","find /tmp/reports1 -name " + "\"" + "*" + "\"" + " -mtime +" + strdaysback + " -print|xargs rm -r"};
final Process process = Runtime.getRuntime().exec(command);
You should also read http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html at least twice and implement the recommendation regarding stdout and stderr.
P.S. Why are you not using Java to find and delete these files?
Message was edited by:
sabre150
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