N30 name-drive-letter · Tar file extraction test suite

N30 name-drive-letter

A name that starts with a drive letter, C:/drive-letter.

Reject(draft) A strict parser must reject this archive.

Category

name

Default policy

rejects it

Files

`N30-name-drive-letter.tar`	test archive, 2,048 bytes sha256 `e454186519cd681ae4907a27f89ed7142ff047ef027fb388e57a78332f662ec7`
`N30-name-drive-letter.json`	expected result
`N30-name-drive-letter.txt`	annotated blocks
`N30-name-drive-letter.py`	generator script

The case¶

The archive has one file, named C:/drive-letter.

In POSIX, the name is resolved like any other: C: is a directory, and drive-letter a file in it. On Windows, C:/ is the root of a drive, so the same name is absolute. This case is ambiguous because the file is drive-letter in a directory C: under the destination, drive-letter at the root of drive C:, outside it, or drive-letter directly in the destination, to a reader that strips the drive as it strips a leading /.

Decision point: whether a drive letter makes a name absolute.

Seen in: none of the scanned tarballs.

The archive¶

Every block of 512 bytes, to scale, with its offset. Hover over a field for its bytes.

N30-name-drive-letter: must reject A name that starts with a drive letter, `C:/drive-letter`. The archive has one file, named `C:/drive-letter`. In POSIX, the name is resolved like any other: `C:` is a directory, and `drive-letter` a file in it. On Windows, `C:/` is the root of a drive, so the same name is absolute. This case is ambiguous because the file is `drive-letter` in a directory `C:` under the destination, `drive-letter` at the root of drive `C:`, outside it, or `drive-letter` directly in the destination, to a reader that strips the drive as it strips a leading `/`. Decision point: whether a drive letter makes a name absolute. Seen in: none of the scanned tarballs. See also: N12, an absolute name. 0x000000 header: regular file name [ 0,100) "C:/drive-letter" + 85 NUL mode [100,108) "0000644" + NUL 644 (octal) uid [108,116) "0000000" + NUL 0 gid [116,124) "0000000" + NUL 0 size [124,136) "00000000043" + NUL 35 mtime [136,148) "00000000000" + NUL 0 chksum [148,156) "012007\0 " 5127: the unsigned sum of the header, this field as spaces typeflag [156,157) "0" regular file linkname [157,257) 100 NUL magic [257,263) "ustar" + NUL version [263,265) "00" uname [265,297) 32 NUL gname [297,329) 32 NUL devmajor [329,337) "0000000" + NUL 0 devminor [337,345) "0000000" + NUL 0 prefix [345,500) 155 NUL pad [500,512) 12 NUL 0x000200 data 35 bytes, then 477 NUL to the end of the block "in C:, or at the root of drive C:?\n" 0x000400 2 zero blocks: the end-of-archive marker 0x000800 end of file

00000000: 433a 2f64 7269 7665 2d6c 6574 7465 7200 C:/drive-letter. 00000010: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000020: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000030: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000040: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000050: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000060: 0000 0000 3030 3030 3634 3400 3030 3030 ....0000644.0000 00000070: 3030 3000 3030 3030 3030 3000 3030 3030 000.0000000.0000 00000080: 3030 3030 3034 3300 3030 3030 3030 3030 0000043.00000000 00000090: 3030 3000 3031 3230 3037 0020 3000 0000 000.012007. 0... 000000a0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000000b0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000000c0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000000d0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000000e0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000000f0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000100: 0075 7374 6172 0030 3000 0000 0000 0000 .ustar.00....... 00000110: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000120: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000130: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000140: 0000 0000 0000 0000 0030 3030 3030 3030 .........0000000 00000150: 0030 3030 3030 3030 0000 0000 0000 0000 .0000000........ 00000160: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000170: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000180: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000190: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000001a0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000001b0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000001c0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000001d0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000001e0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000001f0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000200: 696e 2043 3a2c 206f 7220 6174 2074 6865 in C:, or at the 00000210: 2072 6f6f 7420 6f66 2064 7269 7665 2043 root of drive C 00000220: 3a3f 0a00 0000 0000 0000 0000 0000 0000 :?.............. 00000230: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000240: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000250: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000260: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000270: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000280: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000290: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000002a0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000002b0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000002c0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000002d0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000002e0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000002f0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000300: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000310: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000320: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000330: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000340: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000350: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000360: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000370: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000380: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000390: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000003a0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000003b0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000003c0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000003d0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000003e0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000003f0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000400: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000410: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000420: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000430: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000440: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000450: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000460: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000470: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000480: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000490: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000004a0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000004b0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000004c0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000004d0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000004e0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000004f0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000500: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000510: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000520: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000530: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000540: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000550: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000560: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000570: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000580: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000590: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000005a0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000005b0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000005c0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000005d0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000005e0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000005f0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000600: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000610: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000620: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000630: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000640: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000650: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000660: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000670: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000680: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000690: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000006a0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000006b0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000006c0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000006d0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000006e0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000006f0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000700: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000710: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000720: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000730: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000740: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000750: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000760: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000770: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000780: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000790: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000007a0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000007b0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000007c0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000007d0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000007e0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000007f0: 0000 0000 0000 0000 0000 0000 0000 0000 ................

What implementations make of it¶

In the outcome column, ✅ means that the implementation follows the default policy.

implementation	version	outcome	what it makes of it
GNU tar	tar (GNU tar) 1.35	⚠️ accepts	tree A: `C:/`, `C:/drive-letter` (35 B, 1f39eb72)
bsdtar	bsdtar 3.8.11 - libarchive 3.8.11	⚠️ accepts	tree B: `drive-letter` (35 B, 1f39eb72)
BusyBox tar	BusyBox v1.38.0, defconfig	⚠️ accepts	tree A: `C:/`, `C:/drive-letter` (35 B, 1f39eb72)
7-Zip	7-Zip (z) 26.05 (x64)	⚠️ accepts	tree A: `C:/`, `C:/drive-letter` (35 B, 1f39eb72)
Python tarfile, filter=data, as in pip	CPython 3.15.2	⚠️ accepts	tree A: `C:/`, `C:/drive-letter` (35 B, 1f39eb72)
Python tarfile, filter=tar	CPython 3.15.2	⚠️ accepts	tree A: `C:/`, `C:/drive-letter` (35 B, 1f39eb72)
Python tarfile, filter=fully_trusted	CPython 3.15.2	⚠️ accepts	tree A: `C:/`, `C:/drive-letter` (35 B, 1f39eb72)
node-tar	tar 7.5.22	⚠️ accepts	tree B: `drive-letter` (35 B, 1f39eb72)
node-tar, strict	tar 7.5.22	✅ rejects	error: Error: TAR_ENTRY_INFO: stripping C:/ from absolute path
tar-fs	tar-fs 3.1.3, on tar-stream 3.2.2	⚠️ accepts	tree A: `C:/`, `C:/drive-letter` (35 B, 1f39eb72)
Java Commons Compress	Commons Compress 1.28.0, Expander, on Java 27.0.1.0.2	⚠️ accepts	tree A: `C:/`, `C:/drive-letter` (35 B, 1f39eb72)
.NET System.Formats.Tar	System.Formats.Tar of .NET 10.0.14, ExtractToDirectory	⚠️ accepts	tree A: `C:/`, `C:/drive-letter` (35 B, 1f39eb72)
PHP PharData, as in Composer	PharData of PHP 8.5.12, as Composer's TarDownloader calls it	⚠️ accepts	tree A: `C:/`, `C:/drive-letter` (35 B, 1f39eb72)
Go containerd archive.Apply	containerd v2.4.2, archive.Apply, of go1.27.3	⚠️ accepts	tree A: `C:/`, `C:/drive-letter` (35 B, 1f39eb72)
Rust tar	tar 0.4.46, unpack	⚠️ accepts	tree A: `C:/`, `C:/drive-letter` (35 B, 1f39eb72)
Rust astral-tokio-tar	astral-tokio-tar 0.7.1, unpack	⚠️ accepts	tree A: `C:/`, `C:/drive-letter` (35 B, 1f39eb72)
Rust tar-codec, as in uv	tar-codec 0.0.16, with the policies of uv 0.13	✅ rejects	error: at byte 0: extraction policy rejected input: archive member path rejected by name policy: "C:/drive-letter"
RubyGems	RubyGems 4.0.20 of Ruby 4.0.9, extract_tar_gz	⚠️ accepts	tree A: `C:/`, `C:/drive-letter` (35 B, 1f39eb72)
R untar, internal	utils::untar of R 4.6.2, tar = "internal"	⚠️ accepts	tree A: `C:/`, `C:/drive-letter` (35 B, 1f39eb72)
Perl Archive::Tar	Archive::Tar 3.12 of Perl v5.44.0	⚠️ accepts	tree A: `C:/`, `C:/drive-letter` (35 B, 1f39eb72)
Haskell tar	tar 0.7.2.0, extract, of GHC 9.14	⚠️ accepts	tree A: `C:/`, `C:/drive-letter` (35 B, 1f39eb72)
Julia Tar.jl	Tar 1.10.0 of Julia 1.13.3	⚠️ accepts	tree A: `C:/`, `C:/drive-letter` (35 B, 1f39eb72)
live-bootstrap untar	mescc-tools-extra a151c245e512, as live-bootstrap pins it	⚠️ accepts	tree A: `C:/`, `C:/drive-letter` (35 B, 1f39eb72)
live-bootstrap untar, --non-strict	mescc-tools-extra a151c245e512, as live-bootstrap pins it	⚠️ accepts	tree A: `C:/`, `C:/drive-letter` (35 B, 1f39eb72)

Prevalence in release tarballs¶

The table below shows how many release tarballs have the features of this test case.

ecosystem	tarballs	share
Spack	37,553	none
nixpkgs	18,990	none
Guix	10,168	none
PyPI	10,000	none
crates.io	5,000	none
RubyGems	5,000	none
live-bootstrap	171	none
total (distinct)	82,586	none

ecosystem

tarballs

with it

Spack

37,553

none

nixpkgs

18,990

none

Guix

10,168

none

PyPI

10,000

none

crates.io

5,000

none

RubyGems

5,000

none

live-bootstrap

171

none

total (distinct)

82,586

none

`N30` name-drive-letter

The case¶

The archive¶

What implementations make of it¶

Prevalence in release tarballs¶

See also¶