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//! Process monitoring utilities.

#[macro_use]
mod utils;

pub mod pidfile;

#[cfg(target_os = "linux")]
mod linux;
#[cfg(target_os = "linux")]
pub use linux::*;

/// Type for process identifiers.
///
/// This should expand to `i32` (signed 32 bit integer).
pub type PID = libc::pid_t;

/// Return the PID of the calling process.
pub fn getpid() -> PID {
    unsafe { libc::getpid() }
}

/// Return the PID of the parent process.
pub fn getppid() -> PID {
    unsafe { libc::getppid() }
}

/// Type for user identifiers.
pub type UID = libc::uid_t;

/// Type for group identifiers.
pub type GID = libc::gid_t;