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pub mod newc;
pub use newc::{NewcHeader, NewcReader};
pub mod odc;
pub use odc::{OdcBuilder, OdcHeader, OdcReader};
use {
chrono::{DateTime, NaiveDateTime, Utc},
std::{
fmt::Debug,
io::{Chain, Cursor, Read},
path::PathBuf,
},
};
#[derive(Debug, thiserror::Error)]
pub enum Error {
#[error("I/O error: {0}")]
Io(#[from] std::io::Error),
#[error("bad magic value encountered")]
BadMagic,
#[error("value in header is not an ASCII string")]
BadHeaderString,
#[error("string value in header is not in hex: {0}")]
BadHeaderHex(String),
#[error("filename could not be decoded")]
FilenameDecode,
#[error("Numeric value too large to be encoded")]
ValueTooLarge,
#[error("Size mismatch between header length and provided data")]
SizeMismatch,
#[error("path is not a file: {0}")]
NotAFile(PathBuf),
}
pub type CpioResult<T> = Result<T, Error>;
pub trait CpioHeader: Debug {
fn device(&self) -> u32;
fn inode(&self) -> u32;
fn mode(&self) -> u32;
fn uid(&self) -> u32;
fn gid(&self) -> u32;
fn nlink(&self) -> u32;
fn rdev(&self) -> u32;
fn mtime(&self) -> u32;
fn modified_time(&self) -> DateTime<Utc> {
DateTime::<Utc>::from_utc(NaiveDateTime::from_timestamp(self.mtime() as _, 0), Utc)
}
fn file_size(&self) -> u64;
fn name(&self) -> &str;
}
pub trait CpioReader<T>: Iterator<Item = CpioResult<Box<dyn CpioHeader>>> + Read
where
T: Read + Sized,
{
fn new(reader: T) -> Self
where
Self: Sized;
fn read_next(&mut self) -> CpioResult<Option<Box<dyn CpioHeader>>>;
fn finish(&mut self) -> CpioResult<()>;
}
pub type ChainedCpioReader<T> = dyn CpioReader<Chain<Cursor<Vec<u8>>, T>>;
pub fn reader<T: 'static + Read + Sized>(mut reader: T) -> CpioResult<Box<ChainedCpioReader<T>>> {
let mut magic = vec![0u8; 6];
reader.read_exact(&mut magic)?;
match magic.as_ref() {
crate::newc::MAGIC => Ok(Box::new(NewcReader::new(Cursor::new(magic).chain(reader)))),
crate::odc::MAGIC => Ok(Box::new(OdcReader::new(Cursor::new(magic).chain(reader)))),
_ => Err(Error::BadMagic),
}
}