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Last Post:
Oct 22, 2009 5:13 AM
by: jesdisciple
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How can I call a C program in a Shell Script from Java
Posted:
Oct 22, 2009 1:47 AM
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Hi all,
I have a C program namely NetLibExample.c.I have compiled it to get a NetLibexample executable in RHEL5. It is successfully running from the terminal itself by the syntax: ./NetLibExample
I have written a shell script to call the same.The shell script is test.sh
test.sh
cd /working/AVClient
mkdir habib_test
./NetLibExample
echo "1 image captured"
This shell is running successfully and giving me the output( a new folder habib_test and output from the C program)
I have to call the shell script from Java program.The program is like this.
TestShell.java
public class TestShell {
public static void main(String[] args) {
try{
System.out.println("I am here to test the shell correctly");
Runtime rt = Runtime.getRuntime();
Process proc = rt.exec("/working/test.sh");
int exitVal = proc.waitFor();
}catch(Exception e){
e.printStackTrace();
System.out.println("Exception caught.........."+e.toString());
}
}
}
But when I am trying to call the shell from Java,shell is runnin g properly as I am getting the new folder created from the shell.The java program is giving a exception:
java.lang.IllegalThreadStateException: process hasn't exited
at java.lang.UNIXProcess.exitValue(UNIXProcess.java:172)
at TestShell.main(TestShell.java:27)
Exception caught............java.lang.IllegalThreadStateException: process hasn't exited
Please help me.Thanks in advance.
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Re: How can I call a C program in a Shell Script from Java
Posted:
Oct 22, 2009 5:13 AM
in response to: habiburr
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Hi habiburr. First off, note that I haven't programmed in Java since a long time. I'm here as a Linux geek to nurture this forum. If you have similar interest in the project, I'd appreciate your help - answering questions and petitioning the site for a moderator.
As to your question, which line is #27? If you can identify that, I might be able to help. Although I won't be working off my own knowledge in this area because it doesn't exist; I never went this far with Java and will have to rely on Google.
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