c-scape 0.22.3

A libc bottom-half implementation in Rust
Documentation 
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use crate::convert_res;
use errno::{set_errno, Errno};
use libc::{c_int, pid_t};
use rustix::process::Pid;

#[no_mangle]
unsafe extern "C" fn getpid() -> pid_t {
    libc!(libc::getpid());
    rustix::process::getpid().as_raw_nonzero().get() as _
}

#[no_mangle]
unsafe extern "C" fn getppid() -> pid_t {
    libc!(libc::getppid());
    Pid::as_raw(rustix::process::getppid()) as _
}

#[no_mangle]
unsafe extern "C" fn setpgid(pid: pid_t, pgid: pid_t) -> c_int {
    libc!(libc::setpgid(pid, pgid));

    match convert_res(rustix::process::setpgid(
        Pid::from_raw(pid as _),
        Pid::from_raw(pgid as _),
    )) {
        Some(()) => 0,
        None => -1,
    }
}

#[no_mangle]
unsafe extern "C" fn setpgrp() -> c_int {
    //libc!(libc::setpgrp());

    setpgid(0, 0)
}

#[no_mangle]
unsafe extern "C" fn getpgid(pid: pid_t) -> pid_t {
    libc!(libc::getpgid(pid));

    if pid < 0 {
        set_errno(Errno(libc::ESRCH));
        return -1;
    }

    match convert_res(rustix::process::getpgid(Pid::from_raw(pid as _))) {
        Some(pid) => pid.as_raw_nonzero().get(),
        None => -1,
    }
}

#[no_mangle]
unsafe extern "C" fn getpgrp() -> pid_t {
    libc!(libc::getpgrp());

    rustix::process::getpgrp().as_raw_nonzero().get()
}