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pxar: split assert_relative_path

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the check for a single component is only required in the dir
stack atm

Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
This commit is contained in:
Wolfgang Bumiller 2020-06-08 15:02:52 +02:00
parent c443f58b09
commit 7eacdc765b
3 changed files with 15 additions and 4 deletions
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4
src/pxar/create.rs
View File

@ -21,7 +21,7 @@ use proxmox::tools::fd::RawFdNum;
use crate::pxar::catalog::BackupCatalogWriter;
use crate::pxar::flags;
use crate::pxar::tools::assert_relative_path;
use crate::pxar::tools::assert_single_path_component;
use crate::tools::{acl, fs, xattr, Fd};
fn detect_fs_type(fd: RawFd) -> Result<i64, Error> {
@ -230,7 +230,7 @@ impl<'a, 'b> Archiver<'a, 'b> {
}
let os_file_name = OsStr::from_bytes(file_name_bytes);
assert_relative_path(os_file_name)?;
assert_single_path_component(os_file_name)?;
let full_path = self.path.join(os_file_name);
let stat = match nix::sys::stat::fstatat(

4
src/pxar/dir_stack.rs
View File

@ -10,7 +10,7 @@ use nix::sys::stat::{mkdirat, Mode};
use proxmox::sys::error::SysError;
use pxar::Metadata;
use crate::pxar::tools::{assert_relative_path, perms_from_metadata};
use crate::pxar::tools::{assert_single_path_component, perms_from_metadata};
pub struct PxarDir {
file_name: OsString,
@ -95,7 +95,7 @@ impl PxarDirStack {
}
pub fn push(&mut self, file_name: OsString, metadata: Metadata) -> Result<(), Error> {
assert_relative_path(&file_name)?;
assert_single_path_component(&file_name)?;
self.path.push(&file_name);
self.dirs.push(PxarDir::new(file_name, metadata));
Ok(())

11
src/pxar/tools.rs
View File

@ -24,11 +24,22 @@ pub fn assert_relative_path<S: AsRef<OsStr> + ?Sized>(path: &S) -> Result<(), Er
assert_relative_path_do(Path::new(path))
}
/// Make sure path is a single component and not '.' or '..'.
pub fn assert_single_path_component<S: AsRef<OsStr> + ?Sized>(path: &S) -> Result<(), Error> {
assert_single_path_component_do(Path::new(path))
}
fn assert_relative_path_do(path: &Path) -> Result<(), Error> {
if !path.is_relative() {
bail!("bad absolute file name in archive: {:?}", path);
}
Ok(())
}
fn assert_single_path_component_do(path: &Path) -> Result<(), Error> {
assert_relative_path_do(path)?;
let mut components = path.components();
match components.next() {
Some(std::path::Component::Normal(_)) => (),