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
use std::mem;
use std::os::unix::ffi::OsStrExt;
use std::ffi::OsStr;
use libc::c_char;
use crate::{Errno, Result};
#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
#[repr(transparent)]
pub struct UtsName(libc::utsname);
impl UtsName {
pub fn sysname(&self) -> &OsStr {
cast_and_trim(&self.0.sysname)
}
pub fn nodename(&self) -> &OsStr {
cast_and_trim(&self.0.nodename)
}
pub fn release(&self) -> &OsStr {
cast_and_trim(&self.0.release)
}
pub fn version(&self) -> &OsStr {
cast_and_trim(&self.0.version)
}
pub fn machine(&self) -> &OsStr {
cast_and_trim(&self.0.machine)
}
}
pub fn uname() -> Result<UtsName> {
unsafe {
let mut ret = mem::MaybeUninit::zeroed();
Errno::result(libc::uname(ret.as_mut_ptr()))?;
Ok(UtsName(ret.assume_init()))
}
}
fn cast_and_trim(slice: &[c_char]) -> &OsStr {
let length = slice.iter().position(|&byte| byte == 0).unwrap_or(slice.len());
let bytes = unsafe {
std::slice::from_raw_parts(slice.as_ptr().cast(), length)
};
OsStr::from_bytes(bytes)
}
#[cfg(test)]
mod test {
#[cfg(target_os = "linux")]
#[test]
pub fn test_uname_linux() {
assert_eq!(super::uname().unwrap().sysname(), "Linux");
}
#[cfg(any(target_os = "macos", target_os = "ios"))]
#[test]
pub fn test_uname_darwin() {
assert_eq!(super::uname().unwrap().sysname(), "Darwin");
}
#[cfg(target_os = "freebsd")]
#[test]
pub fn test_uname_freebsd() {
assert_eq!(super::uname().unwrap().sysname(), "FreeBSD");
}
}