Function kenv_get

framework_lib/src/smbios.rs:318–342

(name: &str)

#[cfg(target_os = "freebsd")]
fn kenv_get(name: &str) -> nix::Result<String> {
    use libc::{c_int, KENV_GET, KENV_MVALLEN};
    use nix::errno::Errno;
    use std::ffi::{CStr, CString};

    let cname = CString::new(name).unwrap();
    let name_ptr = cname.as_ptr();

    let mut value_buf = [0; 1 + KENV_MVALLEN as usize];

    unsafe {
        let res: c_int = libc::kenv(
            KENV_GET,
            name_ptr,
            value_buf.as_mut_ptr(),
            value_buf.len() as c_int,
        );
        Errno::result(res)?;

        let cvalue = CStr::from_ptr(value_buf.as_ptr());
        let value = cvalue.to_string_lossy().into_owned();

        Ok(value)
    }
}