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// ctl_info.rs
use ctl_flags::*;
use ctl_type::*;
#[derive(Debug, PartialEq)]
/// A structure representing control metadata
pub struct CtlInfo {
/// The control type.
pub ctl_type: CtlType,
/// A string which specifies the format of the OID in
/// a symbolic way.
///
/// This format is used as a hint by sysctl(8) to
/// apply proper data formatting for display purposes.
///
/// Formats defined in sysctl(9):
/// * `N` node
/// * `A` char *
/// * `I` int
/// * `IK[n]` temperature in Kelvin, multiplied by an optional single
/// digit power of ten scaling factor: 1 (default) gives deciKelvin,
/// 0 gives Kelvin, 3 gives milliKelvin
/// * `IU` unsigned int
/// * `L` long
/// * `LU` unsigned long
/// * `Q` quad_t
/// * `QU` u_quad_t
/// * `S,TYPE` struct TYPE structures
pub fmt: String,
pub flags: u32,
}
#[cfg(target_os = "freebsd")]
impl CtlInfo {
/// Is this sysctl a temperature?
pub fn is_temperature(&self) -> bool {
self.fmt.starts_with("IK")
}
}
impl CtlInfo {
/// Return the flags for this sysctl.
pub fn flags(&self) -> CtlFlags {
CtlFlags::from_bits_truncate(self.flags)
}
/// If the sysctl is a structure, return the structure type string.
///
/// Checks whether the format string starts with `S,` and returns the rest
/// of the format string or None if the format String does not have a struct
/// hint.
pub fn struct_type(&self) -> Option<String> {
if !self.fmt.starts_with("S,") {
return None;
}
Some(self.fmt[2..].into())
}
}