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Commit | Line | Data |
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1 | #![unstable(reason = "not public", issue = "none", feature = "fd")] | |
2 | ||
3 | use crate::io::{self, Read}; | |
4 | use crate::mem; | |
5 | use crate::sys::cvt; | |
6 | use crate::sys::hermit::abi; | |
7 | use crate::sys::unsupported; | |
8 | use crate::sys_common::AsInner; | |
9 | ||
10 | #[derive(Debug)] | |
11 | pub struct FileDesc { | |
12 | fd: i32, | |
13 | } | |
14 | ||
15 | impl FileDesc { | |
16 | pub fn new(fd: i32) -> FileDesc { | |
17 | FileDesc { fd } | |
18 | } | |
19 | ||
20 | pub fn raw(&self) -> i32 { | |
21 | self.fd | |
22 | } | |
23 | ||
24 | /// Extracts the actual file descriptor without closing it. | |
25 | pub fn into_raw(self) -> i32 { | |
26 | let fd = self.fd; | |
27 | mem::forget(self); | |
28 | fd | |
29 | } | |
30 | ||
31 | pub fn read(&self, buf: &mut [u8]) -> io::Result<usize> { | |
32 | let result = unsafe { abi::read(self.fd, buf.as_mut_ptr(), buf.len()) }; | |
33 | cvt(result as i32) | |
34 | } | |
35 | ||
36 | pub fn read_to_end(&self, buf: &mut Vec<u8>) -> io::Result<usize> { | |
37 | let mut me = self; | |
38 | (&mut me).read_to_end(buf) | |
39 | } | |
40 | ||
41 | pub fn write(&self, buf: &[u8]) -> io::Result<usize> { | |
42 | let result = unsafe { abi::write(self.fd, buf.as_ptr(), buf.len()) }; | |
43 | cvt(result as i32) | |
44 | } | |
45 | ||
46 | pub fn duplicate(&self) -> io::Result<FileDesc> { | |
47 | self.duplicate_path(&[]) | |
48 | } | |
49 | pub fn duplicate_path(&self, _path: &[u8]) -> io::Result<FileDesc> { | |
50 | unsupported() | |
51 | } | |
52 | ||
53 | pub fn nonblocking(&self) -> io::Result<bool> { | |
54 | Ok(false) | |
55 | } | |
56 | ||
57 | pub fn set_cloexec(&self) -> io::Result<()> { | |
58 | unsupported() | |
59 | } | |
60 | ||
61 | pub fn set_nonblocking(&self, _nonblocking: bool) -> io::Result<()> { | |
62 | unsupported() | |
63 | } | |
64 | } | |
65 | ||
66 | impl<'a> Read for &'a FileDesc { | |
67 | fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> { | |
68 | (**self).read(buf) | |
69 | } | |
70 | } | |
71 | ||
72 | impl AsInner<i32> for FileDesc { | |
73 | fn as_inner(&self) -> &i32 { | |
74 | &self.fd | |
75 | } | |
76 | } | |
77 | ||
78 | impl Drop for FileDesc { | |
79 | fn drop(&mut self) { | |
80 | // Note that errors are ignored when closing a file descriptor. The | |
81 | // reason for this is that if an error occurs we don't actually know if | |
82 | // the file descriptor was closed or not, and if we retried (for | |
83 | // something like EINTR), we might close another valid file descriptor | |
84 | // (opened after we closed ours. | |
85 | let _ = unsafe { abi::close(self.fd) }; | |
86 | } | |
87 | } |