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|
// The functions replacing the C macros use the same names as in libc.
#![allow(non_snake_case, unsafe_code)]
use crate::ffi::c_int;
pub(crate) use linux_raw_sys::general::{
siginfo_t, WCONTINUED, WEXITED, WNOHANG, WNOWAIT, WSTOPPED, WUNTRACED,
};
#[inline]
pub(crate) fn WIFSTOPPED(status: i32) -> bool {
(status & 0xff) == 0x7f
}
#[inline]
pub(crate) fn WSTOPSIG(status: i32) -> i32 {
(status >> 8) & 0xff
}
#[inline]
pub(crate) fn WIFCONTINUED(status: i32) -> bool {
status == 0xffff
}
#[inline]
pub(crate) fn WIFSIGNALED(status: i32) -> bool {
((status & 0x7f) + 1) as i8 >= 2
}
#[inline]
pub(crate) fn WTERMSIG(status: i32) -> i32 {
status & 0x7f
}
#[inline]
pub(crate) fn WIFEXITED(status: i32) -> bool {
(status & 0x7f) == 0
}
#[inline]
pub(crate) fn WEXITSTATUS(status: i32) -> i32 {
(status >> 8) & 0xff
}
pub(crate) trait SiginfoExt {
fn si_signo(&self) -> c_int;
fn si_errno(&self) -> c_int;
fn si_code(&self) -> c_int;
unsafe fn si_status(&self) -> c_int;
}
impl SiginfoExt for siginfo_t {
#[inline]
fn si_signo(&self) -> c_int {
// SAFETY: This is technically a union access, but it's only a union
// with padding.
unsafe { self.__bindgen_anon_1.__bindgen_anon_1.si_signo }
}
#[inline]
fn si_errno(&self) -> c_int {
// SAFETY: This is technically a union access, but it's only a union
// with padding.
unsafe { self.__bindgen_anon_1.__bindgen_anon_1.si_errno }
}
#[inline]
fn si_code(&self) -> c_int {
// SAFETY: This is technically a union access, but it's only a union
// with padding.
unsafe { self.__bindgen_anon_1.__bindgen_anon_1.si_code }
}
/// Return the exit status or signal number recorded in a `siginfo_t`.
///
/// # Safety
///
/// `si_signo` must equal `SIGCHLD` (as it is guaranteed to do after a
/// `waitid` call).
#[inline]
unsafe fn si_status(&self) -> c_int {
self.__bindgen_anon_1
.__bindgen_anon_1
._sifields
._sigchld
._status
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_libc_correspondence() {
for status in [
0,
1,
63,
64,
65,
127,
128,
129,
255,
256,
257,
4095,
4096,
4097,
i32::MAX,
i32::MIN,
u32::MAX as i32,
] {
assert_eq!(WIFSTOPPED(status), libc::WIFSTOPPED(status));
assert_eq!(WSTOPSIG(status), libc::WSTOPSIG(status));
assert_eq!(WIFCONTINUED(status), libc::WIFCONTINUED(status));
assert_eq!(WIFSIGNALED(status), libc::WIFSIGNALED(status));
assert_eq!(WTERMSIG(status), libc::WTERMSIG(status));
assert_eq!(WIFEXITED(status), libc::WIFEXITED(status));
assert_eq!(WEXITSTATUS(status), libc::WEXITSTATUS(status));
}
}
}
|
