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add non-linux sigchld waiter

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This commit is contained in:
Wez Furlong 2018-02-20 17:34:32 -08:00
parent a4b55ecffb
commit b66f93ad11
1 changed files with 33 additions and 0 deletions
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33
src/sigchld.rs
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@ -10,6 +10,8 @@ use std::mem;
use std::os::unix::io::RawFd;
use std::ptr;
#[cfg(not(target_os = "linux"))]
static mut WRITE_END: RawFd = -1;
pub struct ChildWaiter {
fd: RawFd,
@ -23,7 +25,38 @@ impl Drop for ChildWaiter {
}
}
#[cfg(not(target_os = "linux"))]
extern "C" fn chld_handler(_signo: libc::c_int, _: *const u8, _: *const u8) {
unsafe {
libc::write(WRITE_END, "x".as_ptr() as *const _, 1);
}
}
impl ChildWaiter {
#[cfg(not(target_os = "linux"))]
pub fn new() -> Result<ChildWaiter, Error> {
unsafe {
let mut pipe: [RawFd; 2] = [-1, -1];
let res = libc::pipe(pipe.as_mut_ptr());
if res == -1 {
bail!("pipe failed: {:?}", io::Error::last_os_error());
}
WRITE_END = pipe[1];
let mut sa: libc::sigaction = mem::zeroed();
sa.sa_sigaction = chld_handler as usize;
sa.sa_flags = (libc::SA_RESTART | libc::SA_NOCLDSTOP) as _;
let res = libc::sigaction(libc::SIGCHLD, &sa, ptr::null_mut());
if res == -1 {
bail!("sigaction SIGCHLD failed: {:?}", io::Error::last_os_error());
}
Ok(Self { fd: pipe[0] })
}
}
#[cfg(target_os = "linux")]
pub fn new() -> Result<ChildWaiter, Error> {
unsafe {
let mut mask: libc::sigset_t = mem::zeroed();