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zvault
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Code Issues Releases Wiki Activity

moved pax extension code out

This commit is contained in:
Dennis Schwerdel 2017-04-16 19:26:15 +02:00
parent ca163ee85e
commit e0f4f30933
2 changed files with 44 additions and 19 deletions
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2
src/repository/metadata.rs
View File

@ -171,7 +171,7 @@ impl Inode {
if meta.file_type().is_symlink() {
inode.symlink_target = Some(try!(fs::read_link(path).map_err(|e| InodeError::ReadLinkTarget(e, path.to_owned()))).to_string_lossy().to_string());
}
inode.mode = meta.st_mode() & 0o7777;
inode.mode = meta.permissions().mode();
inode.user = meta.st_uid();
inode.group = meta.st_gid();
inode.timestamp = meta.st_mtime();

61
src/repository/tarfile.rs
View File

@ -11,6 +11,46 @@ use chrono::prelude::*;
use tar;
struct PaxBuilder(Vec<u8>);
impl PaxBuilder {
pub fn new() -> Self {
PaxBuilder(Vec::new())
}
pub fn add(&mut self, key: &str, value: &str) {
let mut len_len = 1;
let mut max_len = 10;
let rest_len = 3 + key.len() + value.len();
while rest_len + len_len >= max_len {
len_len += 1;
max_len *= 10;
}
let len = rest_len + len_len;
write!(&mut self.0, "{} {}={}\n", len, key, value).unwrap();
}
fn as_bytes(&self) -> &[u8] {
&self.0
}
}
trait BuilderExt {
fn append_pax_extensions(&mut self, headers: &PaxBuilder) -> Result<(), io::Error>;
}
impl<T: Write> BuilderExt for tar::Builder<T> {
fn append_pax_extensions(&mut self, headers: &PaxBuilder) -> Result<(), io::Error> {
let mut header = tar::Header::new_ustar();
header.set_size(headers.as_bytes().len() as u64);
header.set_entry_type(tar::EntryType::XHeader);
header.set_cksum();
self.append(&header, headers.as_bytes())
}
}
static PAX_XATTR_PREFIX: &'static str = "SCHILY.xattr.";
fn inode_from_entry<R: Read>(entry: &mut tar::Entry<R>) -> Result<Inode, RepositoryError> {
@ -214,26 +254,11 @@ impl Repository {
}
fn export_xattrs<W: Write>(&mut self, inode: &Inode, tarfile: &mut tar::Builder<W>) -> Result<(), RepositoryError> {
let mut data = Vec::new();
let mut pax = PaxBuilder::new();
for (key, value) in &inode.xattrs {
let mut len_len = 1;
let mut max_len = 10;
let rest_len = 3 + key.len() + value.len() + PAX_XATTR_PREFIX.len();
while rest_len + len_len >= max_len {
len_len += 1;
max_len *= 10;
}
let len = rest_len + len_len;
let value = str::from_utf8(value).unwrap();
let line = format!("{} {}{}={}\n", len, PAX_XATTR_PREFIX, key, value);
assert_eq!(line.len(), len);
data.extend_from_slice(line.as_bytes());
pax.add(&format!("{}{}", PAX_XATTR_PREFIX,key), str::from_utf8(value).unwrap());
}
let mut header = tar::Header::new_ustar();
header.set_size(data.len() as u64);
header.set_entry_type(tar::EntryType::XHeader);
header.set_cksum();
Ok(try!(tarfile.append(&header, Cursor::new(&data))))
Ok(try!(tarfile.append_pax_extensions(&pax)))
}
fn export_tarfile_recurse<W: Write>(&mut self, backup: &Backup, path: &Path, inode: Inode, tarfile: &mut tar::Builder<W>) -> Result<(), RepositoryError> {