multithreading - Java : Running shell script in background -

im trying run shell script in background not terminate when function/process end. seems despite nohup, when java thread ends. script.

below sample code.

/// /// tries run script in background /// try {     runtime rt = runtime.getruntime();     process pr = rt.exec("nohup sh ./runner.sh > output.txt &", new string[] {}, wrkdir);     // pr.waitfor(); // intentionally not using } catch(exception e) {     throw new runtimeexception(e); } 

nohup applies invocations shell, not calling program.

there lot of ways solve this, 1 springs mind try modifying java code invoke launcher shell script invokes nohup runner.sh... code (without needing launch sh).

something (untested) code:

revised java:

/// /// tries run script in background /// try {     runtime rt = runtime.getruntime();     process pr = rt.exec("sh ./launcher.sh", new string[] {}, wrkdir);     // pr.waitfor(); // intentionally not using } catch(exception e) {     throw new runtimeexception(e); } 

launcher.sh

#!/bin/sh  nohup ./runner.sh > output.txt & 

i'm not sure redirection here, if works (as mentioned, solution untested), downside lose feedback attempting invoke runner--any errors in script invocation unavailable java process.