class IO::FileDescriptor

Overview

An IO over a file descriptor.

Included Modules

Direct Known Subclasses

Defined in:

io/file_descriptor.cr

Class Method Summary

Instance Method Summary

Instance methods inherited from module IO::Buffered

close close, flush flush, flush_on_newline=(flush_on_newline) flush_on_newline=, flush_on_newline? flush_on_newline?, read(slice : Slice(UInt8)) read, rewind rewind, sync=(sync) sync=, sync? sync?, unbuffered_close unbuffered_close, unbuffered_flush unbuffered_flush, unbuffered_read(slice : Slice(UInt8)) unbuffered_read, unbuffered_rewind unbuffered_rewind, unbuffered_write(slice : Slice(UInt8)) unbuffered_write, write(slice : Slice(UInt8)) write

Instance methods inherited from module IO

<<(obj) : self <<, close close, closed? closed?, cooked(&block) cooked, cooked! cooked!, each_byte
each_byte(&block) each_byte, each_char(&block)
each_char each_char, each_line(*args, **options)
each_line(*args, **options, &block) each_line, encoding : String encoding, flush flush, gets(limit : Int) : String | Nil
gets(delimiter : Char, limit : Int) : String | Nil
gets(delimiter : Char) : String | Nil
gets : String | Nil
gets(delimiter : String) : String | Nil gets, gets_to_end : String gets_to_end, print(obj) : Nil
print(*objects : _) : Nil print, printf(format_string, *args) : Nil
printf(format_string, args : Array | Tuple) : Nil printf, puts : Nil
puts(*objects : _) : Nil
puts(string : String) : Nil
puts(obj) : Nil puts, raw(&block) raw, raw! raw!, read(slice : Slice(UInt8)) read, read_byte : UInt8 | Nil read_byte, read_bytes(type, format : IO::ByteFormat = IO::ByteFormat::SystemEndian) read_bytes, read_char : Char | Nil read_char, read_fully(slice : Slice(UInt8)) read_fully, read_line(*args, **options) : String | Nil read_line, read_nonblock(size) read_nonblock, read_utf8(slice : Slice(UInt8)) read_utf8, read_utf8_byte read_utf8_byte, rewind rewind, set_encoding(encoding : String, invalid : Symbol | Nil = nil) set_encoding, skip(bytes_count : Int) : Nil skip, tty? : Bool tty?, write(slice : Slice(UInt8)) : Nil write, write_byte(byte : UInt8) write_byte, write_bytes(object, format : IO::ByteFormat = IO::ByteFormat::SystemEndian) write_bytes, write_utf8(slice : Slice(UInt8)) write_utf8

Class methods inherited from module IO

copy(src, dst, limit : Int)
copy(src, dst) copy, pipe(read_blocking = false, write_blocking = false, &block)
pipe(read_blocking = false, write_blocking = false) pipe, select(read_ios, write_ios, error_ios, timeout_sec : LibC::TimeT | Int | Float | Nil)
select(read_ios, write_ios = nil, error_ios = nil) select

Instance methods inherited from module JSON::Builder

json_array(&block) json_array, json_object(&block) json_object

Instance methods inherited from class Reference

==(other)
==(other : self) ==, dup dup, hash hash, inspect(io : IO) : Nil inspect, object_id : UInt64 object_id, same?(other : Reference)
same?(other : Nil) same?, to_s(io : IO) : Nil to_s

Instance methods inherited from class Object

!=(other) !=, !~(other) !~, ==(other) ==, ===(other)
===(other : YAML::Any)
===(other : JSON::Any) ===, =~(other) =~, class class, crystal_type_id crystal_type_id, dup dup, hash hash, inspect(io : IO)
inspect inspect, itself itself, not_nil! not_nil!, tap(&block) tap, to_json to_json, to_pretty_json(io : IO)
to_pretty_json to_pretty_json, to_s
to_s(io : IO) to_s, to_yaml
to_yaml(io : IO) to_yaml, try(&block) try

Class methods inherited from class Object

==(other : Class) ==, ===(other) ===, cast(other) : self cast, clone clone, dup dup, from_json(string_or_io, root : String) : self
from_json(string_or_io) : self from_json, from_yaml(string : String) : self from_yaml, hash hash, inspect(io) inspect, name : String name, to_s(io) to_s, |(other : U.class) |

Class Method Detail

def self.fcntl(fd, cmd, arg = 0) #

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def self.new(fd : Int32, blocking = false, edge_triggerable = false) #

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Instance Method Detail

def blocking #

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def blocking=(value) #

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def close_on_exec=(arg : Bool) #

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def close_on_exec? #

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def closed? : Bool #

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def fcntl(cmd, arg = 0) #

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def fd : Int32 #

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def finalize #

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def pos #

Returns the current position (in bytes) in this IO.

io = MemoryIO.new "hello"
io.pos     # => 0
io.gets(2) # => "he"
io.pos     # => 2

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def pos=(value) #

Sets the current position (in bytes) in this IO.

io = MemoryIO.new "hello"
io.pos = 3
io.gets_to_end # => "lo"

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def read_timeout=(read_timeout : Number) #

Set the number of seconds to wait when reading before raising an IO::Timeout.


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def read_timeout=(read_timeout : Time::Span) #

Set the number of seconds to wait when reading before raising an IO::Timeout.


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def read_timeout=(read_timeout : Nil) #

Sets no timeout on read operations, so an IO::Timeout will never be raised.


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def reopen(other : IO::FileDescriptor) #

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def seek(offset, whence : Seek = Seek::Set) #

Seeks to a given offset (in bytes) according to the whence argument. Returns self.

file = File.new("testfile")
file.gets(3) # => "abc"
file.seek(1, IO::Seek::Set)
file.gets(2) # => "bc"
file.seek(-1, IO::Seek::Current)
file.gets(1) # => "c"

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def stat #

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def tell #

Same as #pos.


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def to_fd_io #

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def tty? #

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def write_timed_out : Bool #

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def write_timed_out=(write_timed_out : Bool) #

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def write_timeout=(write_timeout : Nil) #

Sets no timeout on write operations, so an IO::Timeout will never be raised.


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def write_timeout=(write_timeout : Time::Span) #

Set the number of seconds to wait when writing before raising an IO::Timeout.


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def write_timeout=(write_timeout : Number) #

Set the number of seconds to wait when writing before raising an IO::Timeout.


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