Resourced spawn processes.

Return a resource spawn processes, when initiated return the (stdin, stdout, stderr, pstate) tuple, std streams are created when pass ProcessCreate option, otherwise will be Nothing, pstate will be updated to ProcessExited automatically when the process exits.

When you finish using the process resource, a cleanup action will be called to wait process exit and close any std stream created during spawn. If you also need to kill the process, see initProcess' instead.

initProcess defaultProcessOptions{
      processFile="your program"
  ,   processStdStreams = (ProcessCreate, ProcessCreate, ProcessCreate)
  } $ (stdin, stdout, stderr, pstate) -> do
  ... -- read or write from child process's std stream, will clean up automatically
  waitProcessExit pstate  -- wait for process exit on current thread.

Resourced spawn processes.

The same as initProcess, but the clean action will try to send SIGTERM to the process first.

Spawn a processe with given input.

Child process's stdout and stderr output are collected, return with exit code.

Spawn a processe with given UTF8 textual input.

Child process's stdout and stderr output are collected as UTF8 bytes, return with exit code.

Default process options, start "./main" with no arguments, redirect all std streams to /dev/null.

Process state

Defines the exit codes that a program can return.

Wait until process exit and return the ExitCode.

Get process PID if process is running.

Send signals to process.

Retrieves the scheduling priority of the process specified by pid.

The returned value of priority is between -20 (high priority) and 19 (low priority). On Windows, the returned priority will equal one of the PRIORITY constants.

Sets the scheduling priority of the process specified by pid.

The priority value range is between -20 (high priority) and 19 (low priority). The constants PRIORITY_LOW, PRIORITY_BELOW_NORMAL, PRIORITY_NORMAL, PRIORITY_ABOVE_NORMAL, PRIORITY_HIGH, and PRIORITY_HIGHEST are also provided for convenience.

Spawn a new process.

Please manually close child process's std stream(if any) after process exits.

Set the child process' user id.

This is not supported on Windows, uv_spawn() will fail and set the error to UV_ENOTSUP.

Set the child process' user id.

This is not supported on Windows, uv_spawn() will fail and set the error to UV_ENOTSUP.

Do not wrap any arguments in quotes, or perform any other escaping, when converting the argument list into a command line string.

This option is only meaningful on Windows systems. On Unix it is silently ignored.

Spawn the child process in a detached state

This will make it a process group leader, and will effectively enable the child to keep running after the parent exits.

Hide the subprocess console window that would normally be created.

This option is only meaningful on Windows systems. On Unix it is silently ignored.

Hide the subprocess GUI window that would normally be created.

This option is only meaningful on Windows systems. On Unix it is silently ignored.