https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=201506
Bug ID: 201506
Summary: bsdtar fails on zfs compressed and/or sparse files
Product: Base System
Version: 11.0-CURRENT
Hardware: Any
OS: Any
Status: New
Severity: Affects Many People
Priority: ---
Component: bin
Assignee: [email protected]
Reporter: [email protected]
Test case 1: sparse file
# truncate -s10g foo
# echo "bar" >> foo
# tar cf - foo | tar tf -
foo
tar: Truncated input file (needed 10737418240 bytes, only 8192 available)
tar: Error exit delayed from previous errors.
Test case 2: zfs compressed file
(this is run on a zfs filesystem with lz4 compression turned on)
# dd if=/dev/zero of=derp bs=1m count=10k
# echo foo >> derp
# tar cf - derp | tar tf -
derp
tar: Truncated input file (needed 10737418240 bytes, only 8192 available)
tar: Error exit delayed from previous errors.
In a real-world scenario, I encountered this bug when restoring a large VM disk
image from a tape. The source image was on a compressed zfs filesystem.
These issues may have been fixed upstream. See:
https://github.com/libarchive/libarchive/issues/464
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