1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
use crate::net::Shutdown;
use crate::os::unix::net::SocketAddr;
use io_lifetimes::{AsFd, BorrowedFd, OwnedFd};
use std::fmt;
use std::io::{self, IoSlice, IoSliceMut, Read, Write};
use std::os::unix;
use std::os::unix::io::{AsRawFd, FromRawFd, IntoRawFd, RawFd};
use std::time::Duration;

/// A Unix stream socket.
///
/// This corresponds to [`std::os::unix::net::UnixStream`].
///
/// This `UnixStream` has no `connect` method. To create a `UnixStream`, first
/// obtain a [`Dir`] containing the path, and then call
/// [`Dir::connect_unix_stream`].
///
/// [`std::os::unix::net::UnixStream`]: https://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html
/// [`Dir`]: struct.Dir.html
/// [`Dir::connect_unix_stream`]: struct.Dir.html#method.connect_unix_stream
pub struct UnixStream {
    std: unix::net::UnixStream,
}

impl UnixStream {
    /// Constructs a new instance of `Self` from the given
    /// `std::os::unix::net::UnixStream`.
    ///
    /// This grants access the resources the `std::os::unix::net::UnixStream`
    /// instance already has access to.
    #[inline]
    pub fn from_std(std: unix::net::UnixStream) -> Self {
        Self { std }
    }

    /// Creates an unnamed pair of connected sockets.
    ///
    /// This corresponds to [`std::os::unix::net::UnixStream::pair`].
    ///
    /// TODO: should this require a capability?
    ///
    /// [`std::os::unix::net::UnixStream::pair`]: https://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.pair
    #[inline]
    pub fn pair() -> io::Result<(Self, Self)> {
        unix::net::UnixStream::pair().map(|(a, b)| (Self::from_std(a), Self::from_std(b)))
    }

    /// Creates a new independently owned handle to the underlying socket.
    ///
    /// This corresponds to [`std::os::unix::net::UnixStream::try_clone`].
    ///
    /// [`std::os::unix::net::UnixStream::try_clone`]: https://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.try_clone
    #[inline]
    pub fn try_clone(&self) -> io::Result<Self> {
        let unix_stream = self.std.try_clone()?;
        Ok(Self::from_std(unix_stream))
    }

    /// Returns the socket address of the local half of this connection.
    ///
    /// This corresponds to [`std::os::unix::net::UnixStream::local_addr`].
    ///
    /// [`std::os::unix::net::UnixStream::local_addr`]: https://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.local_addr
    #[inline]
    pub fn local_addr(&self) -> io::Result<SocketAddr> {
        self.std.local_addr()
    }

    /// Returns the socket address of the remote half of this connection.
    ///
    /// This corresponds to [`std::os::unix::net::UnixStream::peer_addr`].
    ///
    /// [`std::os::unix::net::UnixStream::peer_addr`]: https://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.peer_addr
    #[inline]
    pub fn peer_addr(&self) -> io::Result<SocketAddr> {
        self.std.peer_addr()
    }

    /// Sets the read timeout for the socket.
    ///
    /// This corresponds to
    /// [`std::os::unix::net::UnixStream::set_read_timeout`].
    ///
    /// [`std::os::unix::net::UnixStream::set_read_timeout`]: https://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.set_read_timeout
    #[inline]
    pub fn set_read_timeout(&self, timeout: Option<Duration>) -> io::Result<()> {
        self.std.set_read_timeout(timeout)
    }

    /// Sets the write timeout for the socket.
    ///
    /// This corresponds to
    /// [`std::os::unix::net::UnixStream::set_write_timeout`].
    ///
    /// [`std::os::unix::net::UnixStream::set_write_timeout`]: https://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.set_write_timeout
    #[inline]
    pub fn set_write_timeout(&self, timeout: Option<Duration>) -> io::Result<()> {
        self.std.set_write_timeout(timeout)
    }

    /// Returns the read timeout of this socket.
    ///
    /// This corresponds to [`std::os::unix::net::UnixStream::read_timeout`].
    ///
    /// [`std::os::unix::net::UnixStream::read_timeout`]: https://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout
    #[inline]
    pub fn read_timeout(&self) -> io::Result<Option<Duration>> {
        self.std.read_timeout()
    }

    /// Returns the write timeout of this socket.
    ///
    /// This corresponds to [`std::os::unix::net::UnixStream::write_timeout`].
    ///
    /// [`std::os::unix::net::UnixStream::write_timeout`]: https://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout
    #[inline]
    pub fn write_timeout(&self) -> io::Result<Option<Duration>> {
        self.std.write_timeout()
    }

    /// Moves the socket into or out of nonblocking mode.
    ///
    /// This corresponds to
    /// [`std::os::unix::net::UnixStream::set_nonblocking`].
    ///
    /// [`std::os::unix::net::UnixStream::set_nonblocking`]: https://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.set_nonblocking
    #[inline]
    pub fn set_nonblocking(&self, nonblocking: bool) -> io::Result<()> {
        self.std.set_nonblocking(nonblocking)
    }

    /// Returns the value of the `SO_ERROR` option.
    ///
    /// This corresponds to [`std::os::unix::net::UnixStream::take_error`].
    ///
    /// [`std::os::unix::net::UnixStream::take_error`]: https://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.take_error
    #[inline]
    pub fn take_error(&self) -> io::Result<Option<io::Error>> {
        self.std.take_error()
    }

    /// Shuts down the read, write, or both halves of this connection.
    ///
    /// This corresponds to [`std::os::unix::net::UnixStream::shutdown`].
    ///
    /// [`std::os::unix::net::UnixStream::shutdown`]: https://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.shutdown
    #[inline]
    pub fn shutdown(&self, how: Shutdown) -> io::Result<()> {
        self.std.shutdown(how)
    }
}

impl FromRawFd for UnixStream {
    #[inline]
    unsafe fn from_raw_fd(fd: RawFd) -> Self {
        Self::from_std(unix::net::UnixStream::from_raw_fd(fd))
    }
}

impl From<OwnedFd> for UnixStream {
    #[inline]
    fn from(fd: OwnedFd) -> Self {
        Self::from_std(unix::net::UnixStream::from(fd))
    }
}

impl AsRawFd for UnixStream {
    #[inline]
    fn as_raw_fd(&self) -> RawFd {
        self.std.as_raw_fd()
    }
}

impl AsFd for UnixStream {
    #[inline]
    fn as_fd(&self) -> BorrowedFd<'_> {
        self.std.as_fd()
    }
}

impl IntoRawFd for UnixStream {
    #[inline]
    fn into_raw_fd(self) -> RawFd {
        self.std.into_raw_fd()
    }
}

impl From<UnixStream> for OwnedFd {
    #[inline]
    fn from(stream: UnixStream) -> OwnedFd {
        stream.std.into()
    }
}

impl Read for UnixStream {
    #[inline]
    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
        self.std.read(buf)
    }

    #[inline]
    fn read_vectored(&mut self, bufs: &mut [IoSliceMut]) -> io::Result<usize> {
        self.std.read_vectored(bufs)
    }

    #[inline]
    fn read_exact(&mut self, buf: &mut [u8]) -> io::Result<()> {
        self.std.read_exact(buf)
    }

    #[inline]
    fn read_to_end(&mut self, buf: &mut Vec<u8>) -> io::Result<usize> {
        self.std.read_to_end(buf)
    }

    #[inline]
    fn read_to_string(&mut self, buf: &mut String) -> io::Result<usize> {
        self.std.read_to_string(buf)
    }

    #[cfg(can_vector)]
    #[inline]
    fn is_read_vectored(&self) -> bool {
        self.std.is_read_vectored()
    }
}

impl Read for &UnixStream {
    #[inline]
    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
        (&mut &self.std).read(buf)
    }

    #[inline]
    fn read_vectored(&mut self, bufs: &mut [IoSliceMut]) -> io::Result<usize> {
        (&mut &self.std).read_vectored(bufs)
    }

    #[inline]
    fn read_exact(&mut self, buf: &mut [u8]) -> io::Result<()> {
        (&mut &self.std).read_exact(buf)
    }

    #[inline]
    fn read_to_end(&mut self, buf: &mut Vec<u8>) -> io::Result<usize> {
        (&mut &self.std).read_to_end(buf)
    }

    #[inline]
    fn read_to_string(&mut self, buf: &mut String) -> io::Result<usize> {
        (&mut &self.std).read_to_string(buf)
    }

    #[cfg(can_vector)]
    #[inline]
    fn is_read_vectored(&self) -> bool {
        self.std.is_read_vectored()
    }
}

impl Write for UnixStream {
    #[inline]
    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
        self.std.write(buf)
    }

    #[inline]
    fn flush(&mut self) -> io::Result<()> {
        self.std.flush()
    }

    #[inline]
    fn write_vectored(&mut self, bufs: &[IoSlice]) -> io::Result<usize> {
        self.std.write_vectored(bufs)
    }

    #[inline]
    fn write_all(&mut self, buf: &[u8]) -> io::Result<()> {
        self.std.write_all(buf)
    }

    #[cfg(can_vector)]
    #[inline]
    fn is_write_vectored(&self) -> bool {
        self.std.is_write_vectored()
    }

    #[cfg(write_all_vectored)]
    #[inline]
    fn write_all_vectored(&mut self, bufs: &mut [IoSlice]) -> io::Result<()> {
        self.std.write_all_vectored(bufs)
    }
}

impl Write for &UnixStream {
    #[inline]
    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
        (&mut &self.std).write(buf)
    }

    #[inline]
    fn flush(&mut self) -> io::Result<()> {
        (&mut &self.std).flush()
    }

    #[inline]
    fn write_vectored(&mut self, bufs: &[IoSlice]) -> io::Result<usize> {
        (&mut &self.std).write_vectored(bufs)
    }

    #[inline]
    fn write_all(&mut self, buf: &[u8]) -> io::Result<()> {
        (&mut &self.std).write_all(buf)
    }

    #[cfg(can_vector)]
    #[inline]
    fn is_write_vectored(&self) -> bool {
        self.std.is_write_vectored()
    }

    #[cfg(write_all_vectored)]
    #[inline]
    fn write_all_vectored(&mut self, bufs: &mut [IoSlice]) -> io::Result<()> {
        (&mut &self.std).write_all_vectored(bufs)
    }
}

impl fmt::Debug for UnixStream {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        self.std.fmt(f)
    }
}