uapi/other/
linux.rs

1use crate::*;
2use std::mem::MaybeUninit;
3
4#[man(eventfd(2))]
5pub fn eventfd(initval: c::c_uint, flags: c::c_int) -> Result<OwnedFd> {
6    let res = unsafe { c::eventfd(initval, flags) };
7    map_err!(res).map(OwnedFd::new)
8}
9
10/// Reads from an eventfd file descriptor
11pub fn eventfd_read(fd: c::c_int) -> Result<u64> {
12    let mut num = 0;
13    let res = read(fd, &mut num)?.len();
14    if res < 8 {
15        Err(Errno(c::EBADF))
16    } else {
17        Ok(num)
18    }
19}
20
21/// Writes to an eventfd file descriptor
22pub fn eventfd_write(fd: c::c_int, num: u64) -> Result<()> {
23    let res = write(fd, &num)?;
24    if res < 8 {
25        Err(Errno(c::EBADF))
26    } else {
27        Ok(())
28    }
29}
30
31#[man(memfd_create(2))]
32pub fn memfd_create<'a>(name: impl IntoUstr<'a>, flags: c::c_uint) -> Result<OwnedFd> {
33    let name = name.into_ustr();
34    let res = unsafe {
35        c::syscall(c::SYS_memfd_create, name.as_ptr() as usize, flags as usize)
36    };
37    map_err!(res).map(|val| OwnedFd::new(val as _))
38}
39
40#[man(sysinfo(2))]
41pub fn sysinfo() -> Result<c::sysinfo> {
42    let mut sysinfo = MaybeUninit::uninit();
43    let res = unsafe { c::sysinfo(sysinfo.as_mut_ptr()) };
44    map_err!(res).map(|_| unsafe { sysinfo.assume_init() })
45}
46
47#[man(pipe2(2))]
48pub fn pipe2(flags: c::c_int) -> Result<(OwnedFd, OwnedFd)> {
49    let mut buf = [0; 2];
50    let res = unsafe { c::pipe2(buf.as_mut_ptr(), flags) };
51    map_err!(res).map(|_| (OwnedFd::new(buf[0]), OwnedFd::new(buf[1])))
52}
53
54#[man(syncfs(2))]
55pub fn syncfs(fd: c::c_int) -> Result<()> {
56    let res = unsafe { libc::syscall(c::SYS_syncfs, fd as usize) };
57    map_err!(res).map(drop)
58}
uapi/other/linux.rs

uapi/other/
linux.rs
