CODEWITHSUNDEEP
javashellprocessruntime.exec
user2110167
user2110167

Reputation: 249

Runtime's exec() method is not redirecting the output

Process p = Runtime.getRuntime().exec("sh somescript.sh &> out.txt");

I am running this command using Java. The script is running but it's not redirecting its stream to the file. Moreover, the file out.txt is not getting created.

This script runs fine if I run it on shell.

Any ideas?

Upvotes: 24

Views: 24267

Answers (2)

Peter Lawrey
Peter Lawrey

Reputation: 533472

When you run a command, there is no shell running and any shell commands or functions are not available. To use something like &> you need a shell. You have one but you are not passing it to it. try instead.

Runtime.getRuntime().exec(new String[] { "sh", "somescript.sh &> out.txt" });

Upvotes: 7

johnchen902
johnchen902

Reputation: 9601

You need to use ProcessBuilder to redirect.

ProcessBuilder builder = new ProcessBuilder("sh", "somescript.sh");
builder.redirectOutput(new File("out.txt"));
builder.redirectError(new File("out.txt"));
Process p = builder.start(); // may throw IOException

Upvotes: 47

Related Questions