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    use crate::process::Pid;
    use crate::{backend, io};

    pub use backend::process::types::Signal;

    /// `kill(pid, sig)`—Sends a signal to a process.
    ///
    /// # References
    ///  - [POSIX]
    ///  - [Linux]
    ///
    /// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/kill.html
    /// [Linux]: https://man7.org/linux/man-pages/man2/kill.2.html
    #[inline]
    #[doc(alias = "kill")]
    pub fn kill_process(pid: Pid, sig: Signal) -> io::Result<()> {
        backend::process::syscalls::kill_process(pid, sig)
    }

    /// `kill(-pid, sig)`—Sends a signal to all processes in a process group.
    ///
    /// If `pid` is 1, this sends a signal to all processes the current process
    /// has permission to send signals to, except process `1`, possibly other
    /// system-specific processes, and on some systems, the current process.
    ///
    /// # References
    ///  - [POSIX]
    ///  - [Linux]
    ///
    /// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/kill.html
    /// [Linux]: https://man7.org/linux/man-pages/man2/kill.2.html
    #[inline]
    #[doc(alias = "kill")]
    pub fn kill_process_group(pid: Pid, sig: Signal) -> io::Result<()> {
        backend::process::syscalls::kill_process_group(pid, sig)
    }

    /// `kill(0, sig)`—Sends a signal to all processes in the current process
    /// group.
    ///
    /// # References
    ///  - [POSIX]
    ///  - [Linux]
    ///
    /// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/kill.html
    /// [Linux]: https://man7.org/linux/man-pages/man2/kill.2.html
    #[inline]
    #[doc(alias = "kill")]
    pub fn kill_current_process_group(sig: Signal) -> io::Result<()> {
        backend::process::syscalls::kill_current_process_group(sig)
    }