Module | PhusionPassenger::NativeSupport
In: | ext/phusion_passenger/native_support.c

Utility functions for accessing system functionality.

### Methods

accept close_all_file_descriptors create_unix_socket disable_stdio_buffering recv_fd send_fd

### Constants

UNIX_PATH_MAX | = | INT2NUM(sizeof(addr.sun_path)) |  | The maximum length of a Unix socket path, including terminating null.

### Public Class methods

accept(fileno)

Accept a new client from the given socket.

- `fileno` (integer): The file descriptor of the server socket.
- Returns: The accepted client‘s file descriptor.
- Raises `SystemCallError` if something went wrong.

[Source]

    /*
     * call-seq: accept(fileno)
     *
     * Accept a new client from the given socket.
     *
     * - +fileno+ (integer): The file descriptor of the server socket.
     * - Returns: The accepted client's file descriptor.
     * - Raises +SystemCallError+ if something went wrong.
     */
    static VALUE
    f_accept(VALUE self, VALUE fileno) {

close_all_file_descriptors(exceptions)

Close all file descriptors, except those given in the `exceptions` array. For example, the following would close all file descriptors except standard input (0) and standard output (1).

     close_all_file_descriptors([0, 1])

[Source]

    /*
     * call-seq: close_all_file_descriptors(exceptions)
     *
     * Close all file descriptors, except those given in the +exceptions+ array.
     * For example, the following would close all file descriptors except standard
     * input (0) and standard output (1).
     *
     *  close_all_file_descriptors([0, 1])
     */
    static VALUE
    close_all_file_descriptors(VALUE self, VALUE exceptions) {

create_unix_socket(filename, backlog)

Create a SOCK_STREAM server Unix socket. Unlike Ruby‘s UNIXServer class, this function is also able to create Unix sockets on the abstract namespace by prepending the filename with a null byte.

- `filename` (string): The filename of the Unix socket to create.
- `backlog` (integer): The backlog to use for listening on the socket.
- Returns: The file descriptor of the created Unix socket, as an integer.
- Raises `SystemCallError` if something went wrong.

[Source]

    /*
     * call-seq: create_unix_socket(filename, backlog)
     *
     * Create a SOCK_STREAM server Unix socket. Unlike Ruby's UNIXServer class,
     * this function is also able to create Unix sockets on the abstract namespace
     * by prepending the filename with a null byte.
     *
     * - +filename+ (string): The filename of the Unix socket to create.
     * - +backlog+ (integer): The backlog to use for listening on the socket.
     * - Returns: The file descriptor of the created Unix socket, as an integer.
     * - Raises +SystemCallError+ if something went wrong.
     */
    static VALUE
    create_unix_socket(VALUE self, VALUE filename, VALUE backlog) {

disable_stdio_buffering

Disables any kind of buffering on the C `stdout` and `stderr` variables, so that +fprintf()+ on `stdout` and `stderr` have immediate effect.

[Source]

    /*
     * call-seq: disable_stdio_buffering
     *
     * Disables any kind of buffering on the C +stdout+ and +stderr+ variables,
     * so that +fprintf()+ on +stdout+ and +stderr+ have immediate effect.
     */
    static VALUE
    disable_stdio_buffering() {

recv_fd(socket_fd)

Receive a file descriptor from the given Unix socket. Returns the received file descriptor as an integer. Raises `SystemCallError` if something went wrong.

You do not have call this method directly. A convenience wrapper is provided by IO#recv_io.

[Source]

    /*
     * call-seq: recv_fd(socket_fd)
     *
     * Receive a file descriptor from the given Unix socket. Returns the received
     * file descriptor as an integer. Raises +SystemCallError+ if something went
     * wrong.
     *
     * You do not have call this method directly. A convenience wrapper is
     * provided by IO#recv_io.
     */
    static VALUE
    recv_fd(VALUE self, VALUE socket_fd) {

send_fd(socket_fd, fd_to_send)

Send a file descriptor over the given Unix socket. You do not have to call this function directly. A convenience wrapper is provided by IO#send_io.

- `socket_fd` (integer): The file descriptor of the socket.
- `fd_to_send` (integer): The file descriptor to send.
- Raises `SystemCallError` if something went wrong.

[Source]

    /*
     * call-seq: send_fd(socket_fd, fd_to_send)
     *
     * Send a file descriptor over the given Unix socket. You do not have to call
     * this function directly. A convenience wrapper is provided by IO#send_io.
     *
     * - +socket_fd+ (integer): The file descriptor of the socket.
     * - +fd_to_send+ (integer): The file descriptor to send.
     * - Raises +SystemCallError+ if something went wrong.
     */
    static VALUE
    send_fd(VALUE self, VALUE socket_fd, VALUE fd_to_send) {

[Validate]