vim-jp/reading-vimrc

job_start({command} [, {options}])                      *job_start()*
                Start a job and return a Job object.  Unlike |system()| and
                |:!cmd| this does not wait for the job to finish.

                {command} can be a String.  This works best on MS-Windows.  On
                Unix it is split up in white-separated parts to be passed to
                execvp().  Arguments in double quotes can contain white space.

                {command} can be a List, where the first item is the executable
                and further items are the arguments.  All items are converted
                to String.  This works best on Unix.

                On MS-Windows, job_start() makes a GUI application hidden. If
                want to show it, Use |:!start| instead.

                The command is executed directly, not through a shell, the
                'shell' option is not used.  To use the shell:  
        let job = job_start(["/bin/sh", "-c", "echo hello"])
                Or:  
        let job = job_start('/bin/sh -c "echo hello"')
                Note that this will start two processes, the shell and the
                command it executes.  If you don't want this use the "exec"
                shell command.

                On Unix $PATH is used to search for the executable only when
                the command does not contain a slash.

                The job will use the same terminal as Vim.  If it reads from
                stdin the job and Vim will be fighting over input, that
                doesn't work.  Redirect stdin and stdout to avoid problems:  
        let job = job_start(['sh', '-c', "myserver </dev/null >/dev/null"])

                The returned Job object can be used to get the status with
                |job_status()| and stop the job with |job_stop()|.

                {options} must be a Dictionary.  It can contain many optional
                items, see |job-options|.

                {only available when compiled with the |+job| feature}