1#[cfg(target_os = "hermit")]
2use hermit_abi::{EBADF, STDERR_FILENO, STDIN_FILENO, STDOUT_FILENO};
3#[cfg(target_family = "unix")]
4use libc::{EBADF, STDERR_FILENO, STDIN_FILENO, STDOUT_FILENO};
5
6use crate::io::{self, BorrowedCursor, IoSlice, IoSliceMut};
7use crate::mem::ManuallyDrop;
8#[cfg(target_os = "hermit")]
9use crate::os::hermit::io::FromRawFd;
10#[cfg(target_family = "unix")]
11use crate::os::unix::io::FromRawFd;
12use crate::sys::fd::FileDesc;
13
14pub struct Stdin;
15pub struct Stdout;
16pub struct Stderr;
17
18impl Stdin {
19 pub const fn new() -> Stdin {
20 Stdin
21 }
22}
23
24impl io::Read for Stdin {
25 fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
26 unsafe { ManuallyDrop::new(FileDesc::from_raw_fd(STDIN_FILENO)).read(buf) }
27 }
28
29 fn read_buf(&mut self, buf: BorrowedCursor<'_>) -> io::Result<()> {
30 unsafe { ManuallyDrop::new(FileDesc::from_raw_fd(STDIN_FILENO)).read_buf(cursor:buf) }
31 }
32
33 fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> io::Result<usize> {
34 unsafe { ManuallyDrop::new(FileDesc::from_raw_fd(STDIN_FILENO)).read_vectored(bufs) }
35 }
36
37 #[inline]
38 fn is_read_vectored(&self) -> bool {
39 true
40 }
41}
42
43impl Stdout {
44 pub const fn new() -> Stdout {
45 Stdout
46 }
47}
48
49impl io::Write for Stdout {
50 fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
51 unsafe { ManuallyDrop::new(FileDesc::from_raw_fd(STDOUT_FILENO)).write(buf) }
52 }
53
54 fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> io::Result<usize> {
55 unsafe { ManuallyDrop::new(FileDesc::from_raw_fd(STDOUT_FILENO)).write_vectored(bufs) }
56 }
57
58 #[inline]
59 fn is_write_vectored(&self) -> bool {
60 true
61 }
62
63 #[inline]
64 fn flush(&mut self) -> io::Result<()> {
65 Ok(())
66 }
67}
68
69impl Stderr {
70 pub const fn new() -> Stderr {
71 Stderr
72 }
73}
74
75impl io::Write for Stderr {
76 fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
77 unsafe { ManuallyDrop::new(FileDesc::from_raw_fd(STDERR_FILENO)).write(buf) }
78 }
79
80 fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> io::Result<usize> {
81 unsafe { ManuallyDrop::new(FileDesc::from_raw_fd(STDERR_FILENO)).write_vectored(bufs) }
82 }
83
84 #[inline]
85 fn is_write_vectored(&self) -> bool {
86 true
87 }
88
89 #[inline]
90 fn flush(&mut self) -> io::Result<()> {
91 Ok(())
92 }
93}
94
95pub fn is_ebadf(err: &io::Error) -> bool {
96 err.raw_os_error() == Some(EBADF as i32)
97}
98
99pub const STDIN_BUF_SIZE: usize = crate::sys::io::DEFAULT_BUF_SIZE;
100
101pub fn panic_output() -> Option<impl io::Write> {
102 Some(Stderr::new())
103}
104