ProcessResult runSync(String executable, List<String> arguments, { String workingDirectory, Map<String, String> environment, bool includeParentEnvironment: true, bool runInShell: false, Encoding stdoutEncoding: SYSTEM_ENCODING, Encoding stderrEncoding: SYSTEM_ENCODING })

Starts a process and runs it to completion. This is a synchronous call and will block until the child process terminates.

The arguments are the same as for Process.run.

Returns a ProcessResult with the result of running the process, i.e., exit code, standard out and standard in.

Source 

external static ProcessResult runSync(
    String executable,
    List<String> arguments,
    {String workingDirectory,
     Map<String, String> environment,
     bool includeParentEnvironment: true,
     bool runInShell: false,
     Encoding stdoutEncoding: SYSTEM_ENCODING,
     Encoding stderrEncoding: SYSTEM_ENCODING});