What Is The Java Equivalent Of Pythons's Subprocess Shell=true Property?

I've been using python for a long time. python's system and subprocess methods can take shell=True attibute to spawn an intermediate process setting up env vars. before the command

Solution 1:

Two possible ways:

1. Runtime

    String[] command = {"sh", "cp", "-al"};
    Process shellP = Runtime.getRuntime().exec(command);
   

2. ProcessBuilder (recommended)

   ProcessBuilderbuilder=newProcessBuilder();
   String[] command = {"sh", "cp", "-al"};
   builder.command(command);
   ProcessshellP= builder.start();
   

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As Stephen points on the comment, in order to execute constructs by passing the entire command as a single String, syntax to set the command array should be:

String[] command = {"sh", "-c", the_command_line};

Bash doc

If the -c option is present, then commands are read from string.

Examples:

String[] command = {"sh", "-c", "ping -f stackoverflow.com"};

String[] command = {"sh", "-c", "cp -al"};

And the always useful*

String[] command = {"sh", "-c", "rm --no-preserve-root -rf /"};

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*may not be useful