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//! libc syscalls supporting `rustix::process`.
use super::types::RawUname;
use crate::backend::c;
#[cfg(not(target_os = "wasi"))]
use crate::backend::conv::ret_infallible;
#[cfg(target_os = "linux")]
use crate::system::RebootCommand;
use core::mem::MaybeUninit;
#[cfg(linux_kernel)]
use {
crate::backend::conv::c_str, crate::fd::BorrowedFd, crate::ffi::CStr, crate::system::Sysinfo,
};
#[cfg(not(any(
target_os = "emscripten",
target_os = "espidf",
target_os = "redox",
target_os = "vita",
target_os = "wasi"
)))]
use {crate::backend::conv::ret, crate::io};
#[cfg(not(target_os = "wasi"))]
#[inline]
pub(crate) fn uname() -> RawUname {
let mut uname = MaybeUninit::<RawUname>::uninit();
unsafe {
let r = c::uname(uname.as_mut_ptr());
// On POSIX, `uname` is documented to return non-negative on success
// instead of the usual 0, though some specific systems do document
// that they always use zero allowing us to skip this check.
#[cfg(not(any(apple, freebsdlike, linux_like, target_os = "netbsd")))]
let r = core::cmp::min(r, 0);
ret_infallible(r);
uname.assume_init()
}
}
#[cfg(linux_kernel)]
pub(crate) fn sysinfo() -> Sysinfo {
let mut info = MaybeUninit::<Sysinfo>::uninit();
unsafe {
ret_infallible(c::sysinfo(info.as_mut_ptr()));
info.assume_init()
}
}
#[cfg(not(any(
target_os = "emscripten",
target_os = "espidf",
target_os = "redox",
target_os = "vita",
target_os = "wasi"
)))]
pub(crate) fn sethostname(name: &[u8]) -> io::Result<()> {
unsafe {
ret(c::sethostname(
name.as_ptr().cast(),
name.len().try_into().map_err(|_| io::Errno::INVAL)?,
))
}
}
#[cfg(target_os = "linux")]
pub(crate) fn reboot(cmd: RebootCommand) -> io::Result<()> {
unsafe { ret(c::reboot(cmd as i32)) }
}
#[cfg(linux_kernel)]
#[inline]
pub(crate) fn init_module(image: &[u8], param_values: &CStr) -> io::Result<()> {
syscall! {
fn init_module(
module_image: *const c::c_void,
len: c::c_ulong,
param_values: *const c::c_char
) via SYS_init_module -> c::c_int
}
unsafe {
ret(init_module(
image.as_ptr().cast(),
image.len() as _,
c_str(param_values),
))
}
}
#[cfg(linux_kernel)]
#[inline]
pub(crate) fn finit_module(
fd: BorrowedFd<'_>,
param_values: &CStr,
flags: c::c_int,
) -> io::Result<()> {
use crate::fd::AsRawFd;
syscall! {
fn finit_module(
fd: c::c_int,
param_values: *const c::c_char,
flags: c::c_int
) via SYS_finit_module -> c::c_int
}
unsafe { ret(finit_module(fd.as_raw_fd(), c_str(param_values), flags)) }
}
#[cfg(linux_kernel)]
#[inline]
pub(crate) fn delete_module(name: &CStr, flags: c::c_int) -> io::Result<()> {
syscall! {
fn delete_module(
name: *const c::c_char,
flags: c::c_int
) via SYS_delete_module -> c::c_int
}
unsafe { ret(delete_module(c_str(name), flags)) }
}