65 lines
1.6 KiB
Rust
65 lines
1.6 KiB
Rust
//! Get system identification
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use crate::{Errno, Result};
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use libc::c_char;
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use std::ffi::OsStr;
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use std::mem;
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use std::os::unix::ffi::OsStrExt;
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/// Describes the running system. Return type of [`uname`].
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#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
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#[repr(transparent)]
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pub struct UtsName(libc::utsname);
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impl UtsName {
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/// Name of the operating system implementation.
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pub fn sysname(&self) -> &OsStr {
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cast_and_trim(&self.0.sysname)
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}
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/// Network name of this machine.
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pub fn nodename(&self) -> &OsStr {
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cast_and_trim(&self.0.nodename)
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}
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/// Release level of the operating system.
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pub fn release(&self) -> &OsStr {
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cast_and_trim(&self.0.release)
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}
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/// Version level of the operating system.
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pub fn version(&self) -> &OsStr {
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cast_and_trim(&self.0.version)
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}
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/// Machine hardware platform.
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pub fn machine(&self) -> &OsStr {
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cast_and_trim(&self.0.machine)
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}
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/// NIS or YP domain name of this machine.
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#[cfg(linux_android)]
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pub fn domainname(&self) -> &OsStr {
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cast_and_trim(&self.0.domainname)
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}
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}
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/// Get system identification
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pub fn uname() -> Result<UtsName> {
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unsafe {
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let mut ret = mem::MaybeUninit::zeroed();
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Errno::result(libc::uname(ret.as_mut_ptr()))?;
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Ok(UtsName(ret.assume_init()))
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}
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}
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fn cast_and_trim(slice: &[c_char]) -> &OsStr {
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let length = slice
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.iter()
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.position(|&byte| byte == 0)
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.unwrap_or(slice.len());
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let bytes =
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unsafe { std::slice::from_raw_parts(slice.as_ptr().cast(), length) };
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OsStr::from_bytes(bytes)
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}
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