src/catar/decoder.rs: implement real sequential decoder (no Seek)
I copied the old code to src/catar/inspector.rs. Will modify that later to implement a random access decoder ...
This commit is contained in:
Dietmar Maurer
@ -55,6 +55,8 @@ fn print_filenames(
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_rpcenv: &mut RpcEnvironment,
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) -> Result<Value, Error> {
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/* FIXME
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let archive = tools::required_string_param(¶m, "archive")?;
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let file = std::fs::File::open(archive)?;
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@ -68,6 +70,9 @@ fn print_filenames(
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let mut out = stdout.lock();
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decoder.print_filenames(&mut out, &mut PathBuf::from("."), &root)?;
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*/
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panic!("not implemented");
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Ok(Value::Null)
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}
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@ -3,7 +3,8 @@ extern crate proxmox_backup;
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use failure::*;
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//use std::os::unix::io::AsRawFd;
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use chrono::{DateTime, Local, TimeZone};
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use std::path::Path;
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use std::path::{Path, PathBuf};
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use std::ffi::OsString;
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use proxmox_backup::tools;
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use proxmox_backup::cli::*;
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@ -427,17 +428,15 @@ fn restore(
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if file.ends_with(".catar.didx") {
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let path = format!("api2/json/admin/datastore/{}/catar?{}", repo.store, query);
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let mut target = std::path::PathBuf::from(target_path);
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target.push(file);
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target.set_extension("");
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let fh = std::fs::OpenOptions::new()
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.create_new(true)
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.write(true)
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.open(&target)?;
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let mut filename = std::path::PathBuf::from(file);
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filename.set_extension(""); // remove .didx
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filename.set_extension(""); // remove .catar
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println!("DOWNLOAD FILE {} to {:?}", path, target);
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client.download(&path, Box::new(fh))?;
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println!("DOWNLOAD FILE {} to {:?}", path, filename);
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let writer = CaTarBackupWriter::new(
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&PathBuf::from(target_path), OsString::from(filename), true)?;
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client.download(&path, Box::new(writer))?;
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} else {
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bail!("unknown file extensions - unable to download '{}'", file);
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}
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@ -6,15 +6,14 @@ use failure::*;
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use endian_trait::Endian;
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use super::format_definition::*;
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use crate::tools;
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use std::io::{Read, Write, Seek, SeekFrom};
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use std::io::{Read, Write};
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use std::path::{Path, PathBuf};
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use std::os::unix::io::AsRawFd;
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use std::os::unix::io::RawFd;
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use std::os::unix::io::FromRawFd;
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use std::os::unix::ffi::{OsStrExt, OsStringExt};
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use std::os::unix::ffi::{OsStringExt};
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use std::ffi::{OsStr, OsString};
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use nix::fcntl::OFlag;
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@ -22,49 +21,19 @@ use nix::sys::stat::Mode;
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use nix::errno::Errno;
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use nix::NixPath;
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pub struct CaDirectoryEntry {
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start: u64,
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end: u64,
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pub filename: OsString,
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pub entry: CaFormatEntry,
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}
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// This one needs Read+Seek (we may want one without Seek?)
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pub struct CaTarDecoder<'a, R: Read + Seek> {
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// This one need Read, but works without Seek
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pub struct CaTarDecoder<'a, R: Read> {
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reader: &'a mut R,
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root_start: u64,
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root_end: u64,
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skip_buffer: Vec<u8>,
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}
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const HEADER_SIZE: u64 = std::mem::size_of::<CaFormatHeader>() as u64;
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impl <'a, R: Read + Seek> CaTarDecoder<'a, R> {
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impl <'a, R: Read> CaTarDecoder<'a, R> {
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pub fn new(reader: &'a mut R) -> Result<Self, Error> {
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let root_end = reader.seek(SeekFrom::End(0))?;
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Ok(Self {
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reader: reader,
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root_start: 0,
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root_end: root_end,
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})
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}
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pub fn root(&self) -> CaDirectoryEntry {
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CaDirectoryEntry {
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start: self.root_start,
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end: self.root_end,
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filename: OsString::new(), // Empty
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entry: CaFormatEntry {
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feature_flags: 0,
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mode: 0,
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flags: 0,
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uid: 0,
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gid: 0,
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mtime: 0,
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}
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}
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pub fn new(reader: &'a mut R) -> Self {
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let mut skip_buffer = vec![0u8; 64*1024];
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Self { reader, skip_buffer }
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}
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fn read_item<T: Endian>(&mut self) -> Result<T, Error> {
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@ -127,33 +96,6 @@ impl <'a, R: Read + Seek> CaTarDecoder<'a, R> {
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Ok(std::ffi::OsString::from_vec(buffer))
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}
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pub fn restore<F: Fn(&Path) -> Result<(), Error>>(
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&mut self,
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dir: &CaDirectoryEntry,
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callback: F,
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) -> Result<(), Error> {
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let start = dir.start;
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self.reader.seek(SeekFrom::Start(start))?;
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let base = ".";
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let mut path = PathBuf::from(base);
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let dir = match nix::dir::Dir::open(&path, nix::fcntl::OFlag::O_DIRECTORY, nix::sys::stat::Mode::empty()) {
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Ok(dir) => dir,
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Err(err) => bail!("unable to open base directory - {}", err),
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};
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let restore_dir = "restoretest";
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path.push(restore_dir);
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self.restore_sequential(&mut path, &OsString::from(restore_dir), &dir, &callback)?;
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Ok(())
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}
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fn restore_attributes(&mut self, _entry: &CaFormatEntry) -> Result<CaFormatHeader, Error> {
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loop {
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@ -267,7 +209,7 @@ impl <'a, R: Read + Seek> CaTarDecoder<'a, R> {
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pub fn restore_sequential<F: Fn(&Path) -> Result<(), Error>>(
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&mut self,
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path: &mut PathBuf, // user for error reporting
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path: &mut PathBuf, // used for error reporting
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filename: &OsStr, // repeats path last component
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parent: &nix::dir::Dir,
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callback: &F,
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@ -308,7 +250,18 @@ impl <'a, R: Read + Seek> CaTarDecoder<'a, R> {
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println!("Skip Goodbye");
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if head.size < HEADER_SIZE { bail!("detected short goodbye table"); }
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self.reader.seek(SeekFrom::Current((head.size - HEADER_SIZE) as i64))?;
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// self.reader.seek(SeekFrom::Current((head.size - HEADER_SIZE) as i64))?;
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let mut done = 0;
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let skip = (head.size - HEADER_SIZE) as usize;
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while done < skip {
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let todo = skip - done;
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let n = if todo > self.skip_buffer.len() { self.skip_buffer.len() } else { todo };
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let data = &mut self.skip_buffer[..n];
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self.reader.read_exact(data)?;
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done += n;
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}
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self.restore_mode(&entry, dir.as_raw_fd())?;
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self.restore_mtime(&entry, dir.as_raw_fd())?;
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@ -427,168 +380,6 @@ impl <'a, R: Read + Seek> CaTarDecoder<'a, R> {
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Ok(())
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}
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fn read_directory_entry(&mut self, start: u64, end: u64) -> Result<CaDirectoryEntry, Error> {
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self.reader.seek(SeekFrom::Start(start))?;
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let mut buffer = [0u8; HEADER_SIZE as usize];
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self.reader.read_exact(&mut buffer)?;
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let head = tools::map_struct::<CaFormatHeader>(&buffer)?;
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if u64::from_le(head.htype) != CA_FORMAT_FILENAME {
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bail!("wrong filename header type for object [{}..{}]", start, end);
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}
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let name_len = u64::from_le(head.size);
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let entry_start = start + name_len;
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let filename = self.read_filename(name_len)?;
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let head: CaFormatHeader = self.read_item()?;
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check_ca_header::<CaFormatEntry>(&head, CA_FORMAT_ENTRY)?;
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let entry: CaFormatEntry = self.read_item()?;
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Ok(CaDirectoryEntry {
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start: entry_start,
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end: end,
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filename: filename,
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entry: CaFormatEntry {
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feature_flags: u64::from_le(entry.feature_flags),
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mode: u64::from_le(entry.mode),
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flags: u64::from_le(entry.flags),
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uid: u64::from_le(entry.uid),
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gid: u64::from_le(entry.gid),
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mtime: u64::from_le(entry.mtime),
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},
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})
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}
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pub fn list_dir(&mut self, dir: &CaDirectoryEntry) -> Result<Vec<CaDirectoryEntry>, Error> {
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const GOODBYE_ITEM_SIZE: u64 = std::mem::size_of::<CaFormatGoodbyeItem>() as u64;
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let start = dir.start;
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let end = dir.end;
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//println!("list_dir1: {} {}", start, end);
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if (end - start) < (HEADER_SIZE + GOODBYE_ITEM_SIZE) {
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bail!("detected short object [{}..{}]", start, end);
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}
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self.reader.seek(SeekFrom::Start(end - GOODBYE_ITEM_SIZE))?;
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let mut buffer = [0u8; GOODBYE_ITEM_SIZE as usize];
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self.reader.read_exact(&mut buffer)?;
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let item = tools::map_struct::<CaFormatGoodbyeItem>(&buffer)?;
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if u64::from_le(item.hash) != CA_FORMAT_GOODBYE_TAIL_MARKER {
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bail!("missing goodbye tail marker for object [{}..{}]", start, end);
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}
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let goodbye_table_size = u64::from_le(item.size);
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if goodbye_table_size < (HEADER_SIZE + GOODBYE_ITEM_SIZE) {
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bail!("short goodbye table size for object [{}..{}]", start, end);
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}
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let goodbye_inner_size = goodbye_table_size - HEADER_SIZE - GOODBYE_ITEM_SIZE;
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if (goodbye_inner_size % GOODBYE_ITEM_SIZE) != 0 {
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bail!("wrong goodbye inner table size for entry [{}..{}]", start, end);
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}
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let goodbye_start = end - goodbye_table_size;
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if u64::from_le(item.offset) != (goodbye_start - start) {
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println!("DEBUG: {} {}", u64::from_le(item.offset), goodbye_start - start);
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bail!("wrong offset in goodbye tail marker for entry [{}..{}]", start, end);
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}
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self.reader.seek(SeekFrom::Start(goodbye_start))?;
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let mut buffer = [0u8; HEADER_SIZE as usize];
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self.reader.read_exact(&mut buffer)?;
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let head = tools::map_struct::<CaFormatHeader>(&buffer)?;
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if u64::from_le(head.htype) != CA_FORMAT_GOODBYE {
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bail!("wrong goodbye table header type for entry [{}..{}]", start, end);
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}
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if u64::from_le(head.size) != goodbye_table_size {
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bail!("wrong goodbye table size for entry [{}..{}]", start, end);
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}
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let mut buffer = [0u8; GOODBYE_ITEM_SIZE as usize];
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let mut range_list = Vec::new();
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for i in 0..goodbye_inner_size/GOODBYE_ITEM_SIZE {
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self.reader.read_exact(&mut buffer)?;
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let item = tools::map_struct::<CaFormatGoodbyeItem>(&buffer)?;
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let item_offset = u64::from_le(item.offset);
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if item_offset > (goodbye_start - start) {
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bail!("goodbye entry {} offset out of range [{}..{}] {} {} {}",
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i, start, end, item_offset, goodbye_start, start);
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}
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let item_start = goodbye_start - item_offset;
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let _item_hash = u64::from_le(item.hash);
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let item_end = item_start + u64::from_le(item.size);
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if item_end > goodbye_start {
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bail!("goodbye entry {} end out of range [{}..{}]",
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i, start, end);
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}
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range_list.push((item_start, item_end));
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}
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let mut result = vec![];
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for (item_start, item_end) in range_list {
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let entry = self.read_directory_entry(item_start, item_end)?;
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//println!("ENTRY: {} {} {:?}", item_start, item_end, entry.filename);
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result.push(entry);
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}
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Ok(result)
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}
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pub fn print_filenames<W: std::io::Write>(
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&mut self,
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output: &mut W,
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prefix: &mut PathBuf,
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dir: &CaDirectoryEntry,
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) -> Result<(), Error> {
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let mut list = self.list_dir(dir)?;
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list.sort_unstable_by(|a, b| a.filename.cmp(&b.filename));
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for item in &list {
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prefix.push(item.filename.clone());
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let mode = item.entry.mode as u32;
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let ifmt = mode & libc::S_IFMT;
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let osstr: &OsStr = prefix.as_ref();
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output.write(osstr.as_bytes())?;
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output.write(b"\n")?;
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if ifmt == libc::S_IFDIR {
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self.print_filenames(output, prefix, item)?;
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} else if ifmt == libc::S_IFREG {
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} else if ifmt == libc::S_IFLNK {
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} else if ifmt == libc::S_IFBLK {
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} else if ifmt == libc::S_IFCHR {
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} else {
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bail!("unknown item mode/type for {:?}", prefix);
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}
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prefix.pop();
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}
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Ok(())
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}
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}
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fn file_openat(parent: RawFd, filename: &OsStr, flags: OFlag, mode: Mode) -> Result<std::fs::File, Error> {
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656
src/catar/inspector.rs
Normal file
656
src/catar/inspector.rs
Normal file
@ -0,0 +1,656 @@
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//! *catar* format decoder.
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//!
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//! This module contain the code to decode *catar* archive files.
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use failure::*;
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use endian_trait::Endian;
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use super::format_definition::*;
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use crate::tools;
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use std::io::{Read, Write, Seek, SeekFrom};
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use std::path::{Path, PathBuf};
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use std::os::unix::io::AsRawFd;
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use std::os::unix::io::RawFd;
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use std::os::unix::io::FromRawFd;
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use std::os::unix::ffi::{OsStrExt, OsStringExt};
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use std::ffi::{OsStr, OsString};
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use nix::fcntl::OFlag;
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use nix::sys::stat::Mode;
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use nix::errno::Errno;
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use nix::NixPath;
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pub struct CaDirectoryEntry {
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start: u64,
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end: u64,
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pub filename: OsString,
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pub entry: CaFormatEntry,
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}
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// This one needs Read+Seek (we may want one without Seek?)
|
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pub struct CaTarDecoder<'a, R: Read + Seek> {
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reader: &'a mut R,
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root_start: u64,
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root_end: u64,
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}
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const HEADER_SIZE: u64 = std::mem::size_of::<CaFormatHeader>() as u64;
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impl <'a, R: Read + Seek> CaTarDecoder<'a, R> {
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pub fn new(reader: &'a mut R) -> Result<Self, Error> {
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let root_end = reader.seek(SeekFrom::End(0))?;
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Ok(Self {
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reader: reader,
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root_start: 0,
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root_end: root_end,
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})
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}
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pub fn root(&self) -> CaDirectoryEntry {
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CaDirectoryEntry {
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start: self.root_start,
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end: self.root_end,
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filename: OsString::new(), // Empty
|
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entry: CaFormatEntry {
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feature_flags: 0,
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mode: 0,
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flags: 0,
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uid: 0,
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gid: 0,
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mtime: 0,
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}
|
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}
|
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}
|
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fn read_item<T: Endian>(&mut self) -> Result<T, Error> {
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|
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let mut result: T = unsafe { std::mem::uninitialized() };
|
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|
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let buffer = unsafe { std::slice::from_raw_parts_mut(
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&mut result as *mut T as *mut u8,
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std::mem::size_of::<T>()
|
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)};
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|
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self.reader.read_exact(buffer)?;
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Ok(result.from_le())
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}
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fn read_symlink(&mut self, size: u64) -> Result<PathBuf, Error> {
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if size < (HEADER_SIZE + 2) {
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bail!("dectected short symlink target.");
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}
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let target_len = size - HEADER_SIZE;
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if target_len > (libc::PATH_MAX as u64) {
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bail!("symlink target too long ({}).", target_len);
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}
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let mut buffer = vec![0u8; target_len as usize];
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self.reader.read_exact(&mut buffer)?;
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let last_byte = buffer.pop().unwrap();
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if last_byte != 0u8 {
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bail!("symlink target not nul terminated.");
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}
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|
||||
Ok(PathBuf::from(std::ffi::OsString::from_vec(buffer)))
|
||||
}
|
||||
|
||||
fn read_filename(&mut self, size: u64) -> Result<OsString, Error> {
|
||||
if size < (HEADER_SIZE + 2) {
|
||||
bail!("dectected short filename");
|
||||
}
|
||||
let name_len = size - HEADER_SIZE;
|
||||
|
||||
if name_len > ((libc::FILENAME_MAX as u64) + 1) {
|
||||
bail!("filename too long ({}).", name_len);
|
||||
}
|
||||
|
||||
let mut buffer = vec![0u8; name_len as usize];
|
||||
self.reader.read_exact(&mut buffer)?;
|
||||
|
||||
let last_byte = buffer.pop().unwrap();
|
||||
if last_byte != 0u8 {
|
||||
bail!("filename entry not nul terminated.");
|
||||
}
|
||||
|
||||
if buffer.iter().find(|b| (**b == b'/')).is_some() {
|
||||
bail!("found invalid filename with slashes.");
|
||||
}
|
||||
|
||||
Ok(std::ffi::OsString::from_vec(buffer))
|
||||
}
|
||||
|
||||
pub fn restore<F: Fn(&Path) -> Result<(), Error>>(
|
||||
&mut self,
|
||||
dir: &CaDirectoryEntry,
|
||||
callback: F,
|
||||
) -> Result<(), Error> {
|
||||
|
||||
let start = dir.start;
|
||||
|
||||
self.reader.seek(SeekFrom::Start(start))?;
|
||||
|
||||
let base = ".";
|
||||
|
||||
let mut path = PathBuf::from(base);
|
||||
|
||||
let dir = match nix::dir::Dir::open(&path, nix::fcntl::OFlag::O_DIRECTORY, nix::sys::stat::Mode::empty()) {
|
||||
Ok(dir) => dir,
|
||||
Err(err) => bail!("unable to open base directory - {}", err),
|
||||
};
|
||||
|
||||
let restore_dir = "restoretest";
|
||||
path.push(restore_dir);
|
||||
|
||||
self.restore_sequential(&mut path, &OsString::from(restore_dir), &dir, &callback)?;
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn restore_attributes(&mut self, _entry: &CaFormatEntry) -> Result<CaFormatHeader, Error> {
|
||||
|
||||
loop {
|
||||
let head: CaFormatHeader = self.read_item()?;
|
||||
match head.htype {
|
||||
// fimxe: impl ...
|
||||
_ => return Ok(head),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fn restore_mode(&mut self, entry: &CaFormatEntry, fd: RawFd) -> Result<(), Error> {
|
||||
|
||||
let mode = Mode::from_bits_truncate((entry.mode as u32) & 0o7777);
|
||||
|
||||
nix::sys::stat::fchmod(fd, mode)?;
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn restore_mode_at(&mut self, entry: &CaFormatEntry, dirfd: RawFd, filename: &OsStr) -> Result<(), Error> {
|
||||
|
||||
let mode = Mode::from_bits_truncate((entry.mode as u32) & 0o7777);
|
||||
|
||||
// NOTE: we want :FchmodatFlags::NoFollowSymlink, but fchmodat does not support that
|
||||
// on linux (see man fchmodat). Fortunately, we can simply avoid calling this on symlinks.
|
||||
nix::sys::stat::fchmodat(Some(dirfd), filename, mode, nix::sys::stat::FchmodatFlags::FollowSymlink)?;
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn restore_ugid(&mut self, entry: &CaFormatEntry, fd: RawFd) -> Result<(), Error> {
|
||||
|
||||
let uid = entry.uid as u32;
|
||||
let gid = entry.gid as u32;
|
||||
|
||||
let res = unsafe { libc::fchown(fd, uid, gid) };
|
||||
Errno::result(res)?;
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn restore_ugid_at(&mut self, entry: &CaFormatEntry, dirfd: RawFd, filename: &OsStr) -> Result<(), Error> {
|
||||
|
||||
let uid = entry.uid as u32;
|
||||
let gid = entry.gid as u32;
|
||||
|
||||
let res = filename.with_nix_path(|cstr| unsafe {
|
||||
libc::fchownat(dirfd, cstr.as_ptr(), uid, gid, libc::AT_SYMLINK_NOFOLLOW)
|
||||
})?;
|
||||
Errno::result(res)?;
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn restore_mtime(&mut self, entry: &CaFormatEntry, fd: RawFd) -> Result<(), Error> {
|
||||
|
||||
let times = nsec_to_update_timespec(entry.mtime);
|
||||
|
||||
let res = unsafe { libc::futimens(fd, ×[0]) };
|
||||
Errno::result(res)?;
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn restore_mtime_at(&mut self, entry: &CaFormatEntry, dirfd: RawFd, filename: &OsStr) -> Result<(), Error> {
|
||||
|
||||
let times = nsec_to_update_timespec(entry.mtime);
|
||||
|
||||
let res = filename.with_nix_path(|cstr| unsafe {
|
||||
libc::utimensat(dirfd, cstr.as_ptr(), ×[0], libc::AT_SYMLINK_NOFOLLOW)
|
||||
})?;
|
||||
Errno::result(res)?;
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn restore_device_at(&mut self, entry: &CaFormatEntry, dirfd: RawFd, filename: &OsStr, device: &CaFormatDevice) -> Result<(), Error> {
|
||||
|
||||
let rdev = nix::sys::stat::makedev(device.major, device.minor);
|
||||
let mode = ((entry.mode as u32) & libc::S_IFMT) | 0o0600;
|
||||
let res = filename.with_nix_path(|cstr| unsafe {
|
||||
libc::mknodat(dirfd, cstr.as_ptr(), mode, rdev)
|
||||
})?;
|
||||
Errno::result(res)?;
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn restore_socket_at(&mut self, dirfd: RawFd, filename: &OsStr) -> Result<(), Error> {
|
||||
|
||||
let mode = libc::S_IFSOCK | 0o0600;
|
||||
let res = filename.with_nix_path(|cstr| unsafe {
|
||||
libc::mknodat(dirfd, cstr.as_ptr(), mode, 0)
|
||||
})?;
|
||||
Errno::result(res)?;
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn restore_fifo_at(&mut self, dirfd: RawFd, filename: &OsStr) -> Result<(), Error> {
|
||||
|
||||
let mode = libc::S_IFIFO | 0o0600;
|
||||
let res = filename.with_nix_path(|cstr| unsafe {
|
||||
libc::mkfifoat(dirfd, cstr.as_ptr(), mode)
|
||||
})?;
|
||||
Errno::result(res)?;
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
pub fn restore_sequential<F: Fn(&Path) -> Result<(), Error>>(
|
||||
&mut self,
|
||||
path: &mut PathBuf, // user for error reporting
|
||||
filename: &OsStr, // repeats path last component
|
||||
parent: &nix::dir::Dir,
|
||||
callback: &F,
|
||||
) -> Result<(), Error> {
|
||||
|
||||
let parent_fd = parent.as_raw_fd();
|
||||
|
||||
// read ENTRY first
|
||||
let head: CaFormatHeader = self.read_item()?;
|
||||
check_ca_header::<CaFormatEntry>(&head, CA_FORMAT_ENTRY)?;
|
||||
let entry: CaFormatEntry = self.read_item()?;
|
||||
|
||||
let mode = entry.mode as u32; //fixme: upper 32bits?
|
||||
|
||||
let ifmt = mode & libc::S_IFMT;
|
||||
|
||||
if ifmt == libc::S_IFDIR {
|
||||
let dir = match dir_mkdirat(parent_fd, filename) {
|
||||
Ok(dir) => dir,
|
||||
Err(err) => bail!("unable to open directory {:?} - {}", path, err),
|
||||
};
|
||||
|
||||
let mut head = self.restore_attributes(&entry)?;
|
||||
|
||||
while head.htype == CA_FORMAT_FILENAME {
|
||||
let name = self.read_filename(head.size)?;
|
||||
path.push(&name);
|
||||
println!("NAME: {:?}", path);
|
||||
self.restore_sequential(path, &name, &dir, callback)?;
|
||||
path.pop();
|
||||
|
||||
head = self.read_item()?;
|
||||
}
|
||||
|
||||
if head.htype != CA_FORMAT_GOODBYE {
|
||||
bail!("got unknown header type inside directory entry {:016x}", head.htype);
|
||||
}
|
||||
|
||||
println!("Skip Goodbye");
|
||||
if head.size < HEADER_SIZE { bail!("detected short goodbye table"); }
|
||||
|
||||
// self.reader.seek(SeekFrom::Current((head.size - HEADER_SIZE) as i64))?;
|
||||
let mut done = 0;
|
||||
let skip = (head.size - HEADER_SIZE) as usize;
|
||||
let mut skip_buffer = vec![0u8; 64*1024];
|
||||
while done < skip {
|
||||
let todo = skip - done;
|
||||
let n = if todo > skip_buffer.len() { skip_buffer.len() } else { todo };
|
||||
let data = &mut skip_buffer[..n];
|
||||
self.reader.read_exact(data)?;
|
||||
done += n;
|
||||
}
|
||||
|
||||
|
||||
self.restore_mode(&entry, dir.as_raw_fd())?;
|
||||
self.restore_mtime(&entry, dir.as_raw_fd())?;
|
||||
self.restore_ugid(&entry, dir.as_raw_fd())?;
|
||||
|
||||
return Ok(());
|
||||
}
|
||||
|
||||
if ifmt == libc::S_IFLNK {
|
||||
// fixme: create symlink
|
||||
//fixme: restore permission, acls, xattr, ...
|
||||
|
||||
let head: CaFormatHeader = self.read_item()?;
|
||||
match head.htype {
|
||||
CA_FORMAT_SYMLINK => {
|
||||
let target = self.read_symlink(head.size)?;
|
||||
println!("TARGET: {:?}", target);
|
||||
if let Err(err) = symlinkat(&target, parent_fd, filename) {
|
||||
bail!("create symlink {:?} failed - {}", path, err);
|
||||
}
|
||||
}
|
||||
_ => {
|
||||
bail!("got unknown header type inside symlink entry {:016x}", head.htype);
|
||||
}
|
||||
}
|
||||
|
||||
// self.restore_mode_at(&entry, parent_fd, filename)?; //not supported on symlinks
|
||||
self.restore_ugid_at(&entry, parent_fd, filename)?;
|
||||
self.restore_mtime_at(&entry, parent_fd, filename)?;
|
||||
|
||||
return Ok(());
|
||||
}
|
||||
|
||||
if ifmt == libc::S_IFSOCK {
|
||||
|
||||
self.restore_socket_at(parent_fd, filename)?;
|
||||
|
||||
self.restore_mode_at(&entry, parent_fd, filename)?;
|
||||
self.restore_ugid_at(&entry, parent_fd, filename)?;
|
||||
self.restore_mtime_at(&entry, parent_fd, filename)?;
|
||||
|
||||
return Ok(());
|
||||
}
|
||||
|
||||
if ifmt == libc::S_IFIFO {
|
||||
|
||||
self.restore_fifo_at(parent_fd, filename)?;
|
||||
|
||||
self.restore_mode_at(&entry, parent_fd, filename)?;
|
||||
self.restore_ugid_at(&entry, parent_fd, filename)?;
|
||||
self.restore_mtime_at(&entry, parent_fd, filename)?;
|
||||
|
||||
return Ok(());
|
||||
}
|
||||
|
||||
if (ifmt == libc::S_IFBLK) || (ifmt == libc::S_IFCHR) {
|
||||
|
||||
let head: CaFormatHeader = self.read_item()?;
|
||||
match head.htype {
|
||||
CA_FORMAT_DEVICE => {
|
||||
let device: CaFormatDevice = self.read_item()?;
|
||||
self.restore_device_at(&entry, parent_fd, filename, &device)?;
|
||||
}
|
||||
_ => {
|
||||
bail!("got unknown header type inside device entry {:016x}", head.htype);
|
||||
}
|
||||
}
|
||||
|
||||
self.restore_mode_at(&entry, parent_fd, filename)?;
|
||||
self.restore_ugid_at(&entry, parent_fd, filename)?;
|
||||
self.restore_mtime_at(&entry, parent_fd, filename)?;
|
||||
|
||||
return Ok(());
|
||||
}
|
||||
|
||||
if ifmt == libc::S_IFREG {
|
||||
|
||||
let mut read_buffer: [u8; 64*1024] = unsafe { std::mem::uninitialized() };
|
||||
|
||||
let flags = OFlag::O_CREAT|OFlag::O_WRONLY|OFlag::O_EXCL;
|
||||
let open_mode = Mode::from_bits_truncate(0o0600 | mode);
|
||||
|
||||
let mut file = match file_openat(parent_fd, filename, flags, open_mode) {
|
||||
Ok(file) => file,
|
||||
Err(err) => bail!("open file {:?} failed - {}", path, err),
|
||||
};
|
||||
|
||||
let head = self.restore_attributes(&entry)?;
|
||||
|
||||
if head.htype != CA_FORMAT_PAYLOAD {
|
||||
bail!("got unknown header type for file entry {:016x}", head.htype);
|
||||
}
|
||||
|
||||
if head.size < HEADER_SIZE {
|
||||
bail!("detected short payload");
|
||||
}
|
||||
let need = (head.size - HEADER_SIZE) as usize;
|
||||
//self.reader.seek(SeekFrom::Current(need as i64))?;
|
||||
|
||||
let mut done = 0;
|
||||
while done < need {
|
||||
let todo = need - done;
|
||||
let n = if todo > read_buffer.len() { read_buffer.len() } else { todo };
|
||||
let data = &mut read_buffer[..n];
|
||||
self.reader.read_exact(data)?;
|
||||
file.write_all(data)?;
|
||||
done += n;
|
||||
}
|
||||
|
||||
self.restore_mode(&entry, file.as_raw_fd())?;
|
||||
self.restore_mtime(&entry, file.as_raw_fd())?;
|
||||
self.restore_ugid(&entry, file.as_raw_fd())?;
|
||||
|
||||
return Ok(());
|
||||
}
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn read_directory_entry(&mut self, start: u64, end: u64) -> Result<CaDirectoryEntry, Error> {
|
||||
|
||||
self.reader.seek(SeekFrom::Start(start))?;
|
||||
let mut buffer = [0u8; HEADER_SIZE as usize];
|
||||
self.reader.read_exact(&mut buffer)?;
|
||||
let head = tools::map_struct::<CaFormatHeader>(&buffer)?;
|
||||
|
||||
if u64::from_le(head.htype) != CA_FORMAT_FILENAME {
|
||||
bail!("wrong filename header type for object [{}..{}]", start, end);
|
||||
}
|
||||
|
||||
let name_len = u64::from_le(head.size);
|
||||
|
||||
let entry_start = start + name_len;
|
||||
|
||||
let filename = self.read_filename(name_len)?;
|
||||
|
||||
let head: CaFormatHeader = self.read_item()?;
|
||||
check_ca_header::<CaFormatEntry>(&head, CA_FORMAT_ENTRY)?;
|
||||
let entry: CaFormatEntry = self.read_item()?;
|
||||
|
||||
Ok(CaDirectoryEntry {
|
||||
start: entry_start,
|
||||
end: end,
|
||||
filename: filename,
|
||||
entry: CaFormatEntry {
|
||||
feature_flags: u64::from_le(entry.feature_flags),
|
||||
mode: u64::from_le(entry.mode),
|
||||
flags: u64::from_le(entry.flags),
|
||||
uid: u64::from_le(entry.uid),
|
||||
gid: u64::from_le(entry.gid),
|
||||
mtime: u64::from_le(entry.mtime),
|
||||
},
|
||||
})
|
||||
}
|
||||
|
||||
pub fn list_dir(&mut self, dir: &CaDirectoryEntry) -> Result<Vec<CaDirectoryEntry>, Error> {
|
||||
|
||||
const GOODBYE_ITEM_SIZE: u64 = std::mem::size_of::<CaFormatGoodbyeItem>() as u64;
|
||||
|
||||
let start = dir.start;
|
||||
let end = dir.end;
|
||||
|
||||
//println!("list_dir1: {} {}", start, end);
|
||||
|
||||
if (end - start) < (HEADER_SIZE + GOODBYE_ITEM_SIZE) {
|
||||
bail!("detected short object [{}..{}]", start, end);
|
||||
}
|
||||
|
||||
self.reader.seek(SeekFrom::Start(end - GOODBYE_ITEM_SIZE))?;
|
||||
let mut buffer = [0u8; GOODBYE_ITEM_SIZE as usize];
|
||||
self.reader.read_exact(&mut buffer)?;
|
||||
|
||||
let item = tools::map_struct::<CaFormatGoodbyeItem>(&buffer)?;
|
||||
|
||||
if u64::from_le(item.hash) != CA_FORMAT_GOODBYE_TAIL_MARKER {
|
||||
bail!("missing goodbye tail marker for object [{}..{}]", start, end);
|
||||
}
|
||||
|
||||
let goodbye_table_size = u64::from_le(item.size);
|
||||
if goodbye_table_size < (HEADER_SIZE + GOODBYE_ITEM_SIZE) {
|
||||
bail!("short goodbye table size for object [{}..{}]", start, end);
|
||||
|
||||
}
|
||||
let goodbye_inner_size = goodbye_table_size - HEADER_SIZE - GOODBYE_ITEM_SIZE;
|
||||
if (goodbye_inner_size % GOODBYE_ITEM_SIZE) != 0 {
|
||||
bail!("wrong goodbye inner table size for entry [{}..{}]", start, end);
|
||||
}
|
||||
|
||||
let goodbye_start = end - goodbye_table_size;
|
||||
|
||||
if u64::from_le(item.offset) != (goodbye_start - start) {
|
||||
println!("DEBUG: {} {}", u64::from_le(item.offset), goodbye_start - start);
|
||||
bail!("wrong offset in goodbye tail marker for entry [{}..{}]", start, end);
|
||||
}
|
||||
|
||||
self.reader.seek(SeekFrom::Start(goodbye_start))?;
|
||||
let mut buffer = [0u8; HEADER_SIZE as usize];
|
||||
self.reader.read_exact(&mut buffer)?;
|
||||
let head = tools::map_struct::<CaFormatHeader>(&buffer)?;
|
||||
|
||||
if u64::from_le(head.htype) != CA_FORMAT_GOODBYE {
|
||||
bail!("wrong goodbye table header type for entry [{}..{}]", start, end);
|
||||
}
|
||||
|
||||
if u64::from_le(head.size) != goodbye_table_size {
|
||||
bail!("wrong goodbye table size for entry [{}..{}]", start, end);
|
||||
}
|
||||
|
||||
let mut buffer = [0u8; GOODBYE_ITEM_SIZE as usize];
|
||||
|
||||
let mut range_list = Vec::new();
|
||||
|
||||
for i in 0..goodbye_inner_size/GOODBYE_ITEM_SIZE {
|
||||
self.reader.read_exact(&mut buffer)?;
|
||||
let item = tools::map_struct::<CaFormatGoodbyeItem>(&buffer)?;
|
||||
let item_offset = u64::from_le(item.offset);
|
||||
if item_offset > (goodbye_start - start) {
|
||||
bail!("goodbye entry {} offset out of range [{}..{}] {} {} {}",
|
||||
i, start, end, item_offset, goodbye_start, start);
|
||||
}
|
||||
let item_start = goodbye_start - item_offset;
|
||||
let _item_hash = u64::from_le(item.hash);
|
||||
let item_end = item_start + u64::from_le(item.size);
|
||||
if item_end > goodbye_start {
|
||||
bail!("goodbye entry {} end out of range [{}..{}]",
|
||||
i, start, end);
|
||||
}
|
||||
|
||||
range_list.push((item_start, item_end));
|
||||
}
|
||||
|
||||
let mut result = vec![];
|
||||
|
||||
for (item_start, item_end) in range_list {
|
||||
let entry = self.read_directory_entry(item_start, item_end)?;
|
||||
//println!("ENTRY: {} {} {:?}", item_start, item_end, entry.filename);
|
||||
result.push(entry);
|
||||
}
|
||||
|
||||
Ok(result)
|
||||
}
|
||||
|
||||
pub fn print_filenames<W: std::io::Write>(
|
||||
&mut self,
|
||||
output: &mut W,
|
||||
prefix: &mut PathBuf,
|
||||
dir: &CaDirectoryEntry,
|
||||
) -> Result<(), Error> {
|
||||
|
||||
let mut list = self.list_dir(dir)?;
|
||||
|
||||
list.sort_unstable_by(|a, b| a.filename.cmp(&b.filename));
|
||||
|
||||
for item in &list {
|
||||
|
||||
prefix.push(item.filename.clone());
|
||||
|
||||
let mode = item.entry.mode as u32;
|
||||
|
||||
let ifmt = mode & libc::S_IFMT;
|
||||
|
||||
let osstr: &OsStr = prefix.as_ref();
|
||||
output.write(osstr.as_bytes())?;
|
||||
output.write(b"\n")?;
|
||||
|
||||
if ifmt == libc::S_IFDIR {
|
||||
self.print_filenames(output, prefix, item)?;
|
||||
} else if ifmt == libc::S_IFREG {
|
||||
} else if ifmt == libc::S_IFLNK {
|
||||
} else if ifmt == libc::S_IFBLK {
|
||||
} else if ifmt == libc::S_IFCHR {
|
||||
} else {
|
||||
bail!("unknown item mode/type for {:?}", prefix);
|
||||
}
|
||||
|
||||
prefix.pop();
|
||||
}
|
||||
|
||||
Ok(())
|
||||
}
|
||||
}
|
||||
|
||||
fn file_openat(parent: RawFd, filename: &OsStr, flags: OFlag, mode: Mode) -> Result<std::fs::File, Error> {
|
||||
|
||||
let fd = filename.with_nix_path(|cstr| {
|
||||
nix::fcntl::openat(parent, cstr.as_ref(), flags, mode)
|
||||
})??;
|
||||
|
||||
let file = unsafe { std::fs::File::from_raw_fd(fd) };
|
||||
|
||||
Ok(file)
|
||||
}
|
||||
|
||||
fn dir_mkdirat(parent: RawFd, filename: &OsStr) -> Result<nix::dir::Dir, Error> {
|
||||
|
||||
// call mkdirat first
|
||||
let res = filename.with_nix_path(|cstr| unsafe {
|
||||
libc::mkdirat(parent, cstr.as_ptr(), libc::S_IRWXU)
|
||||
})?;
|
||||
Errno::result(res)?;
|
||||
|
||||
let dir = nix::dir::Dir::openat(parent, filename, OFlag::O_DIRECTORY, Mode::empty())?;
|
||||
|
||||
Ok(dir)
|
||||
}
|
||||
|
||||
fn symlinkat(target: &Path, parent: RawFd, linkname: &OsStr) -> Result<(), Error> {
|
||||
|
||||
target.with_nix_path(|target| {
|
||||
linkname.with_nix_path(|linkname| {
|
||||
let res = unsafe { libc::symlinkat(target.as_ptr(), parent, linkname.as_ptr()) };
|
||||
Errno::result(res)?;
|
||||
Ok(())
|
||||
})?
|
||||
})?
|
||||
}
|
||||
|
||||
fn nsec_to_update_timespec(mtime_nsec: u64) -> [libc::timespec; 2] {
|
||||
|
||||
// restore mtime
|
||||
const UTIME_OMIT: i64 = ((1 << 30) - 2);
|
||||
const NANOS_PER_SEC: i64 = 1_000_000_000;
|
||||
|
||||
let sec = (mtime_nsec as i64) / NANOS_PER_SEC;
|
||||
let nsec = (mtime_nsec as i64) % NANOS_PER_SEC;
|
||||
|
||||
let times: [libc::timespec; 2] = [
|
||||
libc::timespec { tv_sec: 0, tv_nsec: UTIME_OMIT },
|
||||
libc::timespec { tv_sec: sec, tv_nsec: nsec },
|
||||
];
|
||||
|
||||
times
|
||||
}
|
||||
@ -9,5 +9,8 @@ pub use http_client::*;
|
||||
mod catar_backup_stream;
|
||||
pub use catar_backup_stream::*;
|
||||
|
||||
mod catar_decode_writer;
|
||||
pub use catar_decode_writer::*;
|
||||
|
||||
mod backup_repo;
|
||||
pub use backup_repo::*;
|
||||
|
||||
78
src/client/catar_decode_writer.rs
Normal file
78
src/client/catar_decode_writer.rs
Normal file
@ -0,0 +1,78 @@
|
||||
use failure::*;
|
||||
|
||||
use std::thread;
|
||||
use std::os::unix::io::FromRawFd;
|
||||
use std::path::{Path, PathBuf};
|
||||
use std::io::Write;
|
||||
use std::ffi::OsString;
|
||||
|
||||
//use nix::fcntl::OFlag;
|
||||
//use nix::sys::stat::Mode;
|
||||
//use nix::dir::Dir;
|
||||
|
||||
use crate::catar::decoder::*;
|
||||
|
||||
/// Writer implementation to deccode a .catar archive (download).
|
||||
|
||||
pub struct CaTarBackupWriter {
|
||||
pipe: Option<std::fs::File>,
|
||||
child: Option<thread::JoinHandle<()>>,
|
||||
}
|
||||
|
||||
impl Drop for CaTarBackupWriter {
|
||||
|
||||
fn drop(&mut self) {
|
||||
drop(self.pipe.take());
|
||||
self.child.take().unwrap().join().unwrap();
|
||||
}
|
||||
}
|
||||
|
||||
impl CaTarBackupWriter {
|
||||
|
||||
pub fn new(base: &Path, subdir: OsString, verbose: bool) -> Result<Self, Error> {
|
||||
let (rx, tx) = nix::unistd::pipe()?;
|
||||
|
||||
let dir = match nix::dir::Dir::open(base, nix::fcntl::OFlag::O_DIRECTORY, nix::sys::stat::Mode::empty()) {
|
||||
Ok(dir) => dir,
|
||||
Err(err) => bail!("unable to open target directory {:?} - {}", base, err),
|
||||
};
|
||||
let mut path = PathBuf::from(base);
|
||||
path.push(&subdir);
|
||||
|
||||
let child = thread::spawn(move|| {
|
||||
let mut reader = unsafe { std::fs::File::from_raw_fd(rx) };
|
||||
let mut decoder = CaTarDecoder::new(&mut reader);
|
||||
|
||||
|
||||
if let Err(err) = decoder.restore_sequential(&mut path, &subdir, &dir, & |path| {
|
||||
println!("RESTORE: {:?}", path);
|
||||
Ok(())
|
||||
}) {
|
||||
eprintln!("catar decode failed - {}", err);
|
||||
}
|
||||
});
|
||||
|
||||
let pipe = unsafe { std::fs::File::from_raw_fd(tx) };
|
||||
|
||||
Ok(Self { pipe: Some(pipe), child: Some(child) })
|
||||
}
|
||||
}
|
||||
|
||||
impl Write for CaTarBackupWriter {
|
||||
|
||||
fn write(&mut self, buffer: &[u8]) -> Result<usize, std::io::Error> {
|
||||
let pipe = match self.pipe {
|
||||
Some(ref mut pipe) => pipe,
|
||||
None => unreachable!(),
|
||||
};
|
||||
pipe.write(buffer)
|
||||
}
|
||||
|
||||
fn flush(&mut self) -> Result<(), std::io::Error> {
|
||||
let pipe = match self.pipe {
|
||||
Some(ref mut pipe) => pipe,
|
||||
None => unreachable!(),
|
||||
};
|
||||
pipe.flush()
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user