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/Crystal 0.31

class UNIXSocket

Overview

A local interprocess communication clientsocket.

Only available on UNIX and UNIX-like operating systems.

Example usage:

require "socket"

sock = UNIXSocket.new("/tmp/myapp.sock")
sock.puts "message"
response = sock.gets
sock.close

Direct Known Subclasses

Defined in:

socket/unix_socket.cr

Constructors

Class Method Summary

Instance Method Summary

Instance methods inherited from class Socket

accept : Socket accept, accept? accept?, bind(addr, &block)
bind(host : String, port : Int)
bind(port : Int)
bind(addr) bind
, blocking blocking, blocking=(value) blocking=, broadcast=(val : Bool) broadcast=, broadcast? broadcast?, close_on_exec=(arg : Bool) close_on_exec=, close_on_exec? close_on_exec?, close_read close_read, close_write close_write, closed? : Bool closed?, connect(addr, timeout = nil, &block)
connect(addr, timeout = nil) : Nil
connect(host : String, port : Int, connect_timeout = nil) connect
, family : Family family, fcntl(cmd, arg = 0) fcntl, fd : Int32 fd, finalize finalize, getsockopt(optname, optval, level = LibC::SOL_SOCKET) getsockopt, inspect(io : IO) : Nil inspect, keepalive=(val : Bool) keepalive=, keepalive? keepalive?, linger linger, linger=(val : Int?) linger=, listen(backlog : Int = SOMAXCONN)
listen(backlog : Int = SOMAXCONN, &block) listen
, protocol : Protocol protocol, receive(max_message_size = 512) : Tuple(String, Address)
receive(message : Bytes) : Tuple(Int32, Address) receive
, recv_buffer_size recv_buffer_size, recv_buffer_size=(val : Int32) recv_buffer_size=, reuse_address=(val : Bool) reuse_address=, reuse_address? reuse_address?, reuse_port=(val : Bool) reuse_port=, reuse_port? reuse_port?, send(message, to addr : Address) : Int32
send(message) : Int32 send
, send_buffer_size send_buffer_size, send_buffer_size=(val : Int32) send_buffer_size=, setsockopt(optname, optval, level = LibC::SOL_SOCKET) setsockopt, tty? tty?, type : Type type

Constructor methods inherited from class Socket

new(fd : Int32, family, type, protocol = Protocol::IP, blocking = false)
new(family, type, protocol = Protocol::IP, blocking = false) new

Class methods inherited from class Socket

fcntl(fd, cmd, arg = 0) fcntl, ip?(string : String) ip?, tcp(family : Family, blocking = false) tcp, udp(family : Family, blocking = false) udp, unix(type : Type = Type::STREAM, blocking = false) unix

Instance methods inherited from module IO::Evented

evented_close evented_close, evented_read(slice : Bytes, errno_msg : String, &block) : Int32 evented_read, evented_reopen evented_reopen, evented_send(slice : Bytes, errno_msg : String, &block) : Int32 evented_send, evented_write(slice : Bytes, errno_msg : String, &block) : Nil evented_write, read_timeout : Time::Span? read_timeout, read_timeout=(read_timeout : Number) : Number
read_timeout=(timeout : Time::Span?) : Time::Span? read_timeout=
, write_timeout : Time::Span? write_timeout, write_timeout=(write_timeout : Number) : Number
write_timeout=(timeout : Time::Span?) : Time::Span? write_timeout=

Instance methods inherited from module IO::Buffered

buffer_size buffer_size, buffer_size=(value) buffer_size=, close : Nil close, flush flush, peek : Bytes? peek, read(slice : Bytes) read, read_buffering=(read_buffering) read_buffering=, read_buffering? read_buffering?, rewind rewind, sync=(sync) sync=, sync? sync?, unbuffered_close unbuffered_close, unbuffered_flush unbuffered_flush, unbuffered_read(slice : Bytes) unbuffered_read, unbuffered_rewind unbuffered_rewind, unbuffered_write(slice : Bytes) unbuffered_write, write(slice : Bytes) : Nil write

Instance methods inherited from class IO

<self <<, close close, closed? closed?, each_byte(&block) : Nil
each_byte each_byte
, each_char(&block) : Nil
each_char each_char
, each_line(*args, **options, &block : String -> ) : Nil
each_line(*args, **options) each_line
, encoding : String encoding, flush flush, gets(delimiter : Char, limit : Int, chomp = false) : String?
gets(delimiter : Char, chomp = false) : String?
gets(chomp = true) : String?
gets(limit : Int, chomp = false) : String?
gets(delimiter : String, chomp = false) : String? gets
, gets_to_end : String gets_to_end, peek : Bytes? peek, pos pos, pos=(value) pos=, print(*objects : UNDERSCORE) : Nil
print(obj) : Nil print
, printf(format_string, *args) : Nil
printf(format_string, args : Array | Tuple) : Nil printf
, puts(*objects : UNDERSCORE) : Nil
puts : Nil
puts(obj) : Nil
puts(string : String) : Nil puts
, read(slice : Bytes) read, read_at(offset, bytesize, &block) read_at, read_byte : UInt8? read_byte, read_bytes(type, format : IO::ByteFormat = IO::ByteFormat::SystemEndian) read_bytes, read_char : Char? read_char, read_fully(slice : Bytes) read_fully, read_fully?(slice : Bytes) read_fully?, read_line(*args, **options) : String read_line, read_string(bytesize : Int) : String read_string, read_utf8(slice : Bytes) read_utf8, read_utf8_byte read_utf8_byte, rewind rewind, seek(offset, whence : Seek = Seek::Set) seek, set_encoding(encoding : String, invalid : Symbol? = nil) set_encoding, skip(bytes_count : Int) : Nil skip, skip_to_end : Nil skip_to_end, tell tell, tty? : Bool tty?, write(slice : Bytes) : Nil write, write_byte(byte : UInt8) write_byte, write_bytes(object, format : IO::ByteFormat = IO::ByteFormat::SystemEndian) write_bytes, write_utf8(slice : Bytes) write_utf8

Class methods inherited from class IO

copy(src, dst, limit : Int) : UInt64
copy(src, dst) : UInt64 copy
, pipe(read_blocking = false, write_blocking = false) : Tuple(IO::FileDescriptor, IO::FileDescriptor)
pipe(read_blocking = false, write_blocking = false, &block) pipe

Instance methods inherited from class Reference

==(other : self)
==(other : JSON::Any)
==(other : YAML::Any)
==(other) ==
, dup dup, hash(hasher) hash, inspect(io : IO) : Nil inspect, object_id : UInt64 object_id, pretty_print(pp) : Nil pretty_print, same?(other : Reference)
same?(other : Nil) same?
, to_s(io : IO) : Nil to_s

Constructor methods inherited from class Reference

new new

Instance methods inherited from class Object

!=(other) !=, !~(other) !~, ==(other) ==, ===(other : JSON::Any)
===(other : YAML::Any)
===(other) ===
, =~(other) =~, class class, dup dup, hash(hasher)
hash hash
, inspect(io : IO) : Nil
inspect : String inspect
, itself itself, not_nil! not_nil!, pretty_inspect(width = 79, newline = "\n", indent = 0) : String pretty_inspect, pretty_print(pp : PrettyPrint) : Nil pretty_print, tap(&block) tap, to_json(io : IO)
to_json to_json
, to_pretty_json(indent : String = " ")
to_pretty_json(io : IO, indent : String = " ") to_pretty_json
, to_s : String
to_s(io : IO) : Nil to_s
, to_yaml(io : IO)
to_yaml to_yaml
, try(&block) try, unsafe_as(type : T.class) forall T unsafe_as

Constructor methods inherited from class Object

from_json(string_or_io, root : String) : self
from_json(string_or_io) : self from_json
, from_yaml(string_or_io : String | IO) : self from_yaml

Constructor Detail

def self.new(path : String, type : Type = Type::STREAM)Source

Connects a named UNIX socket, bound to a filesystem pathname.

def self.new(*, fd : Int32, type : Type = Type::STREAM, path : String? = nil)Source

Creates a UNIXSocket from an already configured raw file descriptor

Class Method Detail

def self.open(path, type : Type = Type::STREAM, &block)Source

Opens an UNIX socket to a filesystem pathname, yields it to the block, then eventually closes the socket when the block returns.

Returns the value of the block.

def self.pair(type : Type = Type::STREAM)Source

Returns a pair of unamed UNIX sockets.

require "socket"

left, right = UNIXSocket.pair

spawn do
  # echo server
  message = right.gets
  right.puts message
end

left.puts "message"
left.gets # => "message"

def self.pair(type : Type = Type::STREAM, &block)Source

Creates a pair of unamed UNIX sockets (see .pair) and yields them to the block. Eventually closes both sockets when the block returns.

Returns the value of the block.

Instance Method Detail

def local_addressSource

def path : String?Source

def receiveSource

Description copied from class Socket

Receives a text message from the previously bound address.

require "socket"

server = Socket.udp(Socket::Family::INET)
server.bind("localhost", 1234)

message, client_addr = server.receive

def remote_addressSource

© 2012–2019 Manas Technology Solutions.
Licensed under the Apache License, Version 2.0.
https://crystal-lang.org/api/0.31.1/UNIXSocket.html