fish-shell/fish-rust/src/compat.rs

#[allow(non_snake_case)]
pub fn MB_CUR_MAX() -> usize {
    unsafe { C_MB_CUR_MAX() }
}

pub fn cur_term() -> bool {
    unsafe { has_cur_term() }
}

#[allow(non_snake_case)]
pub fn ST_LOCAL() -> u64 {
    unsafe { C_ST_LOCAL() }
}

#[allow(non_snake_case)]
pub fn MNT_LOCAL() -> u64 {
    unsafe { C_MNT_LOCAL() }
}

#[allow(non_snake_case)]
pub fn _CS_PATH() -> i32 {
    unsafe { C_CS_PATH() }
}

extern "C" {
    fn C_MB_CUR_MAX() -> usize;
    fn has_cur_term() -> bool;
    fn C_ST_LOCAL() -> u64;
    fn C_MNT_LOCAL() -> u64;
    fn C_CS_PATH() -> i32;
    pub(crate) fn confstr(
        name: libc::c_int,
        buf: *mut libc::c_char,
        len: libc::size_t,
    ) -> libc::size_t;
}