Running executable through Java on linux

[otacon]

Hey guys,

I'm running into a likely silly issue.

I need to execture a complied c file, in my java code, and need to do it in linux (newest ubuntu distro)

Narrowing it down to an example:

C code:

#include<stdio.h>

main()
{
    printf("Hello World");
    FILE *exeFile;
    exeFile = fopen("myFile","w+");
    fclose(exeFile);
}

and my java code running it:

...
Runtime r=Runtime.getRuntime();
Process p = null;
String s ="/home/otacon/Desktop/exeTest";
p=r.exec(s);
...

Where exeTest is the compiled c file.

Executing the file directly generates the print, and the empty file 'myFile', which is what I want. However, running it through Java (Eclipse) it runs but does absolutely nothing. At first I thought I might just not be getting the output, which is why I added the file creation, but that is not created either.

Thanks in advance for the help!

[otacon]

Well, just an update, I managed to fix it for now, but only in windows,

Compiling the C code in Windows, and running

Runtime.getRuntime().exec("C:\\exeFile");"

does the trick for now. But I still need to figure out how to accomplish this under linux.

Thanks!

[otacon]

OH.MY.GOD. *facepalm*

So yea, the code in my original post works just fine (linux and win). Of course the text output doesn't show up in Eclipse console, which i anticipated, but I brainfarted and didn't think that the file will be created in the Eclipse workspace, not where the compiled c file was located -_- (unlike it is when running it directly)

Way to loose 4 hours.

Sorry for wasting your time!

[noobplus]

Of course the text output doesn't show up in Eclipse console,

the text output can be brought into the eclipse console by taking the process into a buffered reader.

example,

Process p = Runtime.getRuntime().exec("echo Hi it's me dhilip");
BufferedReader stdInput = new BufferedReader(new InputStreamReader(p.getInputStream()));
String s = null;
 while ((s = stdInput.readLine()) != null) {
                    System.out.println(s);
                }

Edited to add: output will be

Hi it's me dhilip

regards
dhilip

[otacon]

the text output can be brought into the eclipse console by taking the process into a buffered reader.

example,

Process p = Runtime.getRuntime().exec("echo Hi it's me dhilip");
BufferedReader stdInput = new BufferedReader(new InputStreamReader(p.getInputStream()));
String s = null;
 while ((s = stdInput.readLine()) != null) {
                    System.out.println(s);
                }

Edited to add: output will be

Hi it's me dhilip

regards
dhilip

Oh, that's quite handy and very useful for me, actually. Thank you!