Tham khảo tài liệu 'handbooks professional java-c-scrip-sql part 261', công nghệ thông tin, kỹ thuật lập trình phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Instance Methods optname optarg . optname optarg . Iterates over each command-line option. Option name and value are passed to the block. Retrieves an option from command-line arguments and returns the namevalue pair of option. Returns type of the current error or nil if no error occurs. Returns an error message of the current error or nil if no error occurs. ordering Sets option ordering. ordering is any of PERMUTE REQUIRE_ORDER or RETURN_IN_ORDER. Returns current ordering. bool Sets status of quiet mode. In quiet mode option parser doesn t output error messages to stdout on errors. The default value is false. Returns current status of quiet mode. option. Sets command-line options that your program accepts specified by arrays of option names and option type constants. Option type is any of NO_ARGUMENT REQUIRED_ARGUMENT or OPTIONAL_ARGUMENT. You have to call set_options before invoking get get_option each or each_option. Terminates option processing. Raises RuntimeError exception if any errors occur before termination. Returns true if option processing is finished without causing errors otherwise returns false. Constants Ordering specifiers PERMUTE REQUIRE_ORDER RETURN_IN_ORDER Argument type specifiers NO_ARGUMENT REQUIRED_ARGUMENT OPTIONAL ARGUMENT PTY Pseudo TTY access module The PTY module executes commands as if their standard I O is connected to ttys. Required Library require pty Module Functions getpty command spawn command Reserves a PTY executes command over the PTY and returns an array of three elements reading I O writing I O and the PID of the child process . With a block the array is passed to the block as block parameters. SIGCHLD is captured while command is running. protect_signal . Protects block execution from SIGCHLD signal exception. This is required to invoke .
