S12 tree-under-fileA member under a file.
Reject(draft) A strict parser must reject this archive.
S12-tree-under-file.tar |
test archive, 3,072 bytes
sha256 b46df4055ed80d774f74fe3192ccba2da6ef6db9296ce6d05d30b52a167ac55f |
S12-tree-under-file.json | expected result |
S12-tree-under-file.txt | annotated blocks |
S12-tree-under-file.py | generator script |
The first member is a file a, the second a file a/b in it. This case is ambiguous because the file a is either replaced with a directory, or kept, and a/b left out.
Decision point: whether a member under a file replaces it.
Seen in: sendmail 8.18.2 and unclutter 8, where the file is a v7 directory named a/.
Every block of 512 bytes, to scale, with its offset. Hover over a field for its bytes.
S12-tree-under-file: must reject
A member under a file.
The first member is a file `a`, the second a file `a/b` in it. This case is ambiguous because the
file `a` is either replaced with a directory, or kept, and `a/b` left out.
Decision point: whether a member under a file replaces it.
Seen in: sendmail 8.18.2 and unclutter 8, where the file is a v7 directory named `a/`.
0x000000 header: regular file
name [ 0,100) "a" + 99 NUL
mode [100,108) "0000644" + NUL 644 (octal)
uid [108,116) "0000000" + NUL 0
gid [116,124) "0000000" + NUL 0
size [124,136) "00000000007" + NUL 7
mtime [136,148) "00000000000" + NUL 0
chksum [148,156) "007345\0 " 3813: 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
7 bytes, then 505 NUL to the end of the block
"a file\n"
0x000400 header: regular file
name [ 0,100) "a/b" + 97 NUL
mode [100,108) "0000644" + NUL 644 (octal)
uid [108,116) "0000000" + NUL 0
gid [116,124) "0000000" + NUL 0
size [124,136) "00000000015" + NUL 13
mtime [136,148) "00000000000" + NUL 0
chksum [148,156) "007565\0 " 3957: 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
0x000600 data
13 bytes, then 499 NUL to the end of the block
"under a file\n"
0x000800 2 zero blocks: the end-of-archive marker
0x000c00 end of file
As xxd writes it: xxd -r makes the archive of it.
00000000: 6100 0000 0000 0000 0000 0000 0000 0000 a............... 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 3030 3700 3030 3030 3030 3030 0000007.00000000 00000090: 3030 3000 3030 3733 3435 0020 3000 0000 000.007345. 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: 6120 6669 6c65 0a00 0000 0000 0000 0000 a file.......... 00000210: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000220: 0000 0000 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: 612f 6200 0000 0000 0000 0000 0000 0000 a/b............. 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 3030 3030 3634 3400 3030 3030 ....0000644.0000 00000470: 3030 3000 3030 3030 3030 3000 3030 3030 000.0000000.0000 00000480: 3030 3030 3031 3500 3030 3030 3030 3030 0000015.00000000 00000490: 3030 3000 3030 3735 3635 0020 3000 0000 000.007565. 0... 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: 0075 7374 6172 0030 3000 0000 0000 0000 .ustar.00....... 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 0030 3030 3030 3030 .........0000000 00000550: 0030 3030 3030 3030 0000 0000 0000 0000 .0000000........ 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: 756e 6465 7220 6120 6669 6c65 0a00 0000 under a file.... 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 ................ 00000800: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000810: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000820: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000830: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000840: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000850: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000860: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000870: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000880: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000890: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000008a0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000008b0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000008c0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000008d0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000008e0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000008f0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000900: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000910: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000920: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000930: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000940: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000950: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000960: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000970: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000980: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000990: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000009a0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000009b0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000009c0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000009d0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000009e0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000009f0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000a00: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000a10: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000a20: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000a30: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000a40: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000a50: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000a60: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000a70: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000a80: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000a90: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000aa0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000ab0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000ac0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000ad0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000ae0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000af0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000b00: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000b10: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000b20: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000b30: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000b40: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000b50: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000b60: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000b70: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000b80: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000b90: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000ba0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000bb0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000bc0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000bd0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000be0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000bf0: 0000 0000 0000 0000 0000 0000 0000 0000 ................
| implementation | version | outcome | what it makes of it |
|---|---|---|---|
| GNU tar | tar (GNU tar) 1.35 | ✅ as the verdict says | error: tar: a/b: Cannot open: Not a directory tar: Exiting with failure status due to previous errors |
| bsdtar | bsdtar 3.8.10 - libarchive 3.8.10 | ✅ as the verdict says | error: a/b: Could not stat a/b: Not a directory bsdtar: Error exit delayed from previous errors |
| BusyBox tar | BusyBox v1.38.0, defconfig | ✅ as the verdict says | error: tar: can't create directory 'a': File exists tar: can't remove old file a/b: Not a directory |
| 7-Zip | 7-Zip (z) 26.05 (x64) | ✅ as the verdict says | error: ERROR: Cannot open output file : errno=20 : Not a directory : DEST/a/b |
| Python tarfile, filter=data, as in pip | CPython 3.15.2 | ✅ as the verdict says | error: NotADirectoryError: [Errno 20] Not a directory: 'DEST/a' |
| Python tarfile, filter=tar | CPython 3.15.2 | ✅ as the verdict says | error: NotADirectoryError: [Errno 20] Not a directory: 'DEST/a' |
| Python tarfile, filter=fully_trusted | CPython 3.15.2 | ✅ as the verdict says | error: NotADirectoryError: [Errno 20] Not a directory: 'DEST/a/b' |
| node-tar | tar 7.5.22 | ⚠️ accepts | tree A: a (7 B, da69f286) |
| node-tar, strict | tar 7.5.22 | ✅ as the verdict says | error: Error: ENOTDIR: not a directory, open 'DEST/a/b' |
| tar-fs | tar-fs 3.1.3, on tar-stream 3.2.2 | ✅ as the verdict says | error: Error: DEST/a is not a valid path |
| Java Commons Compress | Commons Compress 1.28.0, Expander, on Java 27.0.1.0.2 | ✅ as the verdict says | error: java.nio.file.FileAlreadyExistsException: DEST/a |
| .NET System.Formats.Tar | System.Formats.Tar of .NET 10.0.14, ExtractToDirectory | ✅ as the verdict says | error: IOException: The file 'DEST/a' already exists. |
| PHP PharData, as in Composer | PharData of PHP 8.5.12, as Composer's TarDownloader calls it | ✅ as the verdict says | error: Warning: PharData::extractTo(DEST/a/b): Failed to open stream: No such file or directory in contrib/matrix/runners/php/extract.php on line 10 PharException: Extraction from phar "suite/archives/S12-t… |
| Go containerd archive.Apply | containerd v2.4.2, archive.Apply, of go1.27.3 | ✅ as the verdict says | error: mkparent DEST/a: not a directory |
| Rust tar | tar 0.4.46, unpack | ✅ as the verdict says | error: failed to unpack `DEST/a/b` |
| Rust astral-tokio-tar | astral-tokio-tar 0.7.0, unpack | ✅ as the verdict says | error: failed to unpack `DEST/a/b` |
| Rust tar-codec, as in uv | tar-codec 0.0.15, with the policies of uv 0.13 | ✅ as the verdict says | error: archive entry collides with existing path a |
| RubyGems | RubyGems 4.0.20 of Ruby 4.0.9, extract_tar_gz | ✅ as the verdict says | error: Errno::EEXIST: File exists @ dir_s_mkdir - DEST/a |
| R untar, internal | utils::untar of R 4.6.1, tar = "internal" | ✅ as the verdict says | error: failed to create directory ‘a’ Warning message: In dir.create(path, showWarnings = TRUE, recursive = TRUE, ...) : 'a' already exists |
| Perl Archive::Tar | Archive::Tar 3.12 of Perl v5.44.0 | ✅ as the verdict says | error: Could not extract 'a/b' at contrib/matrix/runners/perl/extract.pl line 14. Could not extract 'a/b' |
| Haskell tar | tar 0.7.2.0, extract, of GHC 9.14 | ✅ as the verdict says | error: DEST/a: createDirectory: already exists (File exists) |
| Julia Tar.jl | Tar 1.10.0 of Julia 1.13.3 | ⚠️ accepts | tree B: a/, a/b (13 B, 8e53e378) |
| live-bootstrap untar | mescc-tools-extra a151c245e512, as live-bootstrap pins it, built with cc | ⚠️ accepts | tree A: a (7 B, da69f286) |
| live-bootstrap untar, --non-strict | mescc-tools-extra a151c245e512, as live-bootstrap pins it, built with cc | ⚠️ accepts | tree A: a (7 B, da69f286) |
Release tarballs of Spack, nixpkgs, Guix and live-bootstrap, and samples of PyPI, crates.io and RubyGems with tree.under-file. The default policy rejects all of them.
| ecosystem | tarballs | with it | share |
|---|---|---|---|
| Spack | 37,553 | 2 | <0.01% |
| nixpkgs | 18,990 | 3 | 0.02% |
| Guix | 10,168 | 1 | <0.01% |
| PyPI | 10,000 | 0 | none |
| crates.io | 5,000 | 0 | none |
| RubyGems | 5,000 | 0 | none |
| live-bootstrap | 171 | 0 | none |
| total (distinct) | 82,586 | 5 | <0.01% |
See the list of these 5 tarballs, with the sha256 of each and an example from it.