4lDO2
75 lines
1.8 KiB
Rust
75 lines
1.8 KiB
Rust
use crate::{
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error::{Errno, Result},
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fs::File,
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header::{
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sys_socket::{
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connect,
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constants::{AF_UNIX, SOCK_CLOEXEC, SOCK_DGRAM},
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sockaddr, socket,
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},
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sys_un::sockaddr_un,
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unistd::close,
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},
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io::BufWriter,
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platform::ERRNO,
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};
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use super::logger::LogSink;
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/// Unix Domain Socket connected to /dev/log.
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pub struct LogFile(BufWriter<File>);
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impl LogSink for LogFile {
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type Sink = BufWriter<File>;
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fn open() -> Result<Self>
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where
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Self: Sized,
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{
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let log_addr = {
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let path = c"/dev/log";
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let mut sockaddr: sockaddr_un = unsafe { core::mem::zeroed() };
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sockaddr.sun_family = AF_UNIX as _;
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unsafe {
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core::ptr::copy_nonoverlapping(
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path.as_ptr(),
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sockaddr.sun_path.as_mut_ptr(),
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path.count_bytes(),
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)
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};
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path
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};
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let log_fd = {
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let result = unsafe { socket(AF_UNIX, SOCK_DGRAM | SOCK_CLOEXEC, 0) };
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if result > 0 {
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Ok(result)
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} else {
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Err(Errno(ERRNO.get()))
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}
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}?;
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// SAFETY:
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// * connect handles invalid descriptors.
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// * log_addr is a sockaddr_un so the size is correct.
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if unsafe {
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connect(
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log_fd,
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&raw const log_addr as *const sockaddr,
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size_of::<sockaddr_un>() as u32,
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) < 0
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} {
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// In case close sets ERRNO.
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let e = ERRNO.get();
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close(log_fd);
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return Err(Errno(e));
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}
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Ok(Self(BufWriter::new(File::new(log_fd))))
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}
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#[inline(always)]
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fn writer(&mut self) -> &mut Self::Sink {
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&mut self.0
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}
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}
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