Running ls command from Java stroed procedure no output
Hi ,
I am trying to run ls command from java stored procedure in oracle
Process p = Runtime.getRuntime().exec("ls");
BufferedReader stdInput = new BufferedReader(new
InputStreamReader(p.getInputStream()));
BufferedReader stdError = new BufferedReader(new
InputStreamReader(p.getErrorStream()));
// read the output from the command
System.out.println("output of the command run:\n");
while ((s = stdInput.readLine()) != null) {
System.out.println(s);
from java stored procedure in oracle.
i get output of println statments but it does not go into while loop to print from stdInput.
Result of running Java stored procedure is -
output of the command run:
Call completed.
when i run the program on client side it works fine.
Has anybody tried this from java stroed procedure.
Thanks,
Jag
Jag,
Actually, the question of whether it works for me seems to depend on the version of the OS (or Oracle). On RedHat Linux (Oracle 8.1.6) it didn't work at all, but on Solaris (Oracle 9.0.2) it did. Here's the output from that run:
SQL> /
output of the command run:
init.ora
initDBPart9i.DBPSun01.ora
initdw.ora
lkDBPART9I
orapw
orapwDBPart9i
spfileDBPart9i.ora
Done
PL/SQL procedure successfully completed.
But, I did need to change a line of your code to this:
Process p = Runtime.getRuntime().exec("/usr/bin/ls");
your original was:
Process p = Runtime.getRuntime().exec("ls");
You might consider, if possible, use of some of the Java File classes instead of ls, as this might make things more predictable for you. There were some examples in oramag.com a few months ago, but they were pretty simple (you might not need them).
Hope this helps,
-Dan
http://www.compuware.com/products/devpartner/db/oracle_debug.htm
Debug PL/SQL and Java in the Oracle Database
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================
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Done
PL/SQL procedure successfully completed.
But, I did need to change a line of your code to this:
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your original was:
Process p = Runtime.getRuntime().exec("ls");
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http://www.compuware.com/products/devpartner/db/oracle_debug.htm
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Running UNIX command from Java
import java.lang.* ;
import java.io.* ;
public class TestRunTime
public static void main(String args[])
int rc = -1 ;
String yard = "psnsy" ;
String ifwList = "[email protected],[email protected]" ;
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rc = RunThis(cmd) ;
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int rc = -1;
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p.waitFor() ;
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sabre150 wrote:
Whether the detail is as you say or as I say does not remove the need to process the exec()ed processes stdout and stderr each in their own thread. Since the OP is not writing to stdin he can handle one of stdout or stderr in the Thread that invokes the exec() but the other needs a separate thread.If the streams are stripped from the process then...
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2. Each requires their own thread.
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If one processes the Process stdout and stderr streams then one does not get a deadlock.
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Sample Code for reference.
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import java.io.*;
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public static void main(String[] args) throws Exception {
(new SampleCheck()).test();
void test() throws Exception {
Process proc = Runtime.getRuntime().exec("cmd1");
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.getErrorStream(), System.err);
// any output from the process?
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System.exit(exitVal);
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StreamHandlerInput(InputStream is, OutputStream os) {
this.is = is;
this.os = os;
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try {
int c;
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os.write(c);
System.out.println("c= " + c);
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StreamHandlerOutput(InputStream is, OutputStream os) {
this.is = is;
this.os = os;
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try {
int c;
FileOutputStream fs=new FileOutputStream(f);
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ps.close();*/
InputStreamReader ir = new InputStreamReader(is);
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System.out.println("End of Run Method..Output");
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try {
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The same thing happen if you just type on the console.
I am not aware of any simple way around this.
IDEs get around this by changing the application run so that the input/output is captured as it happens and sent over a socket connection. -
hi all
how do i run dos commands from java??????????Using Runtime#exec().
Also see http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Runtime.html -
Unable to execute Linux command from Java
Hi,
I am currently working on a code wherein i need to execute Linux command from Java. Below are some of the query i have.
1) Is there any efficient method of running OS commands from Java, rather than using Runtime and Process method.
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**-- Java Version**
java version "1.6.0"
OpenJDK Runtime Environment (build 1.6.0-b09)
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process = rt.exec(command);
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/usr/bin/stat: cannot stat `"<path>"': No such file or directory
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--- Code ---
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test.getInode();
public void getInode(){
String command = "/usr/bin/stat -Lt \"/afs/inf.ed.ac.uk/user/s08/s0898671/workspace/CASWESBLIN/TestFS/01_FIL_01.txt.txt\"";
System.out.println(command);
Process process;
Runtime rt;
try{
rt = Runtime.getRuntime();
process = rt.exec(command);
InputStreamReader isr = new InputStreamReader(process.getErrorStream());
BufferedReader bre = new BufferedReader(isr);
BufferedReader br = new BufferedReader(new InputStreamReader(process.getInputStream()));
System.out.println(bre.readLine());
System.out.println(br.readLine().split(" ")[7]);
process.destroy();
}catch (Exception ex){
System.out.println("Error :- " + ex.getMessage());
--- Output ---
[ratz]s0898671: java GetInode
/usr/bin/stat -Lt "/afs/inf.ed.ac.uk/user/s08/s0898671/workspace/CASWESBLIN/TestFS/01_FIL_01.txt.txt"
/usr/bin/stat: cannot stat `"/afs/inf.ed.ac.uk/user/s08/s0898671/workspace/CASWESBLIN/TestFS/01_FIL_01.txt.txt"': No such file or directory
Error :- null
-- Linux Terminal --
If i copy the first line from the output and execute on Linux terminal her is the output that i get
[ratz]s0898671: /usr/bin/stat -Lt "/afs/inf.ed.ac.uk/user/s08/s0898671/workspace/CASWESBLIN/TestFS/01_FIL_01.txt.txt"
/afs/inf.ed.ac.uk/user/s08/s0898671/workspace/CASWESBLIN/TestFS/01_FIL_01.txt.txt 12003 24 81a4 453166 10000 1c 360466554 2 0 1 1246638450 1246638450 1246638450 4096
Can you just assist me where am i really making mistake.......i was wondering if the command that i pass from Java....can be executed on Linux terminal why is it faling to run from java.........and when i print the Error Stream for process output........it show cannot Stat.......
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