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pxar::decoder: Return the correct symlink target size.

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This eliminates also repeated calls to readlink in fuse, which occur when the
preallocated buffer to store the symlink target path is to small.

Signed-off-by: Christian Ebner <c.ebner@proxmox.com>
This commit is contained in:
Christian Ebner 2020-02-27 14:09:56 +01:00 committed by Dietmar Maurer
parent 189996cf4a
commit 351b913d1e
1 changed files with 6 additions and 7 deletions
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13
src/pxar/decoder.rs
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@ -137,13 +137,12 @@ impl Decoder {
check_ca_header::<PxarEntry>(&head, PXAR_ENTRY)?;
let entry: PxarEntry = self.inner.read_item()?;
let (header, xattr) = self.inner.read_attributes()?;
let (size, payload_offset) = match header.htype {
PXAR_PAYLOAD => (header.size - HEADER_SIZE, Some(self.seek(SeekFrom::Current(0))?)),
_ => (0, None),
};
let target = match header.htype {
PXAR_SYMLINK => Some(self.inner.read_link(header.size)?),
_ => None,
let (size, payload_offset, target) = match header.htype {
PXAR_PAYLOAD =>
(header.size - HEADER_SIZE, Some(self.seek(SeekFrom::Current(0))?), None),
PXAR_SYMLINK =>
(header.size - HEADER_SIZE, None, Some(self.inner.read_link(header.size)?)),
_ => (0, None, None),
};
Ok(DirectoryEntry {