Function svn_io_run_cmd 

pub unsafe extern "C" fn svn_io_run_cmd(
    path: *const c_char,
    cmd: *const c_char,
    args: *const *const c_char,
    exitcode: *mut c_int,
    exitwhy: *mut apr_exit_why_e,
    inherit: svn_boolean_t,
    infile: *mut apr_file_t,
    outfile: *mut apr_file_t,
    errfile: *mut apr_file_t,
    pool: *mut apr_pool_t,
) -> *mut svn_error_t

Run a command to completion, by first calling svn_io_start_cmd() and then calling svn_io_wait_for_cmd(). The parameters correspond to the same-named parameters of those two functions.