114     errmsg: Option<String>,  field
120     pub fn errmsg(&self) -> Option<&str> {  in errmsg()  method
121         self.errmsg.as_deref()  in errmsg()
129     fn new(error: Error, errmsg: Option<&CStr>) -> Self {  in new()
132             errmsg: errmsg.map(CStr::to_string_lossy).map(Cow::into_owned),  in new()
143         if let Some(errmsg) = &self.errmsg {  in fmt()
144             write!(f, "{:?}: {}: {}", self.errno, errmsg, self.errno.desc())  in fmt()
380         let mut errmsg = vec![0u8; 255];  in nmount()  localVariable
389             iov_base: errmsg.as_mut_ptr() as *mut c_void,  in nmount()
390             iov_len: errmsg.len(),  in nmount()
399                 let errmsg = match errmsg.iter().position(|&x| x == 0) {  in nmount()  localVariable
403                         let sl = &errmsg[0..n + 1];  in nmount()
407                 Err(NmountError::new(error, errmsg))  in nmount()