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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 17:00:10 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 17:00:10 +0000 |
| commit | 1ebbd027274333758fc3517685d81847601db676 (patch) | |
| tree | 5259d053d3e3066e0745150805fa4b20184eef98 /magic/Magdir/dwarfs | |
| parent | Initial commit. (diff) | |
| download | file-1ebbd027274333758fc3517685d81847601db676.tar.xz file-1ebbd027274333758fc3517685d81847601db676.zip | |
Adding upstream version 1:5.45.upstream/1%5.45upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
| -rw-r--r-- | magic/Magdir/dwarfs | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/magic/Magdir/dwarfs b/magic/Magdir/dwarfs new file mode 100644 index 0000000..3700a33 --- /dev/null +++ b/magic/Magdir/dwarfs @@ -0,0 +1,45 @@ + +#------------------------------------------------------------------------------ +# $File: dwarfs,v 1.2 2023/05/23 13:37:32 christos Exp $ +# dwarfs: file(1) magic for DwarFS File System Image files +# URL: https://github.com/mhx/dwarfs for details about DwarFS +# From: Marcus Holland-Moritz <github@mhxnet.de> + +#### DwarFS Version Macro +0 name dwarfsversion +>&0 byte x \b, version %d +>&1 byte x \b.%d + +#### DwarFS Compression Macro +0 name dwarfscompression +>&0 leshort =0 \b, uncompressed +>&0 leshort =1 \b, LZMA compression +>&0 leshort =2 \b, ZSTD compression +>&0 leshort =3 \b, LZ4 compression +>&0 leshort =4 \b, LZ4HC compression +>&0 leshort =5 \b, BROTLI compression + +#### DwarFS files without header +## We first check against a DWARFS magic at the start of the file, then +## validate by checking the block count / section type to be all zeros +## for the first block. Finally, we check that the *next* block also +## has the correct DWARFS magic. +0 string DWARFS +>&0x2A string/b \0\0\0\0\0\0 +>>&(&0x02.q+0x0A) string DWARFS DwarFS File System Image +>>>&0 use dwarfsversion +>>&0 use dwarfscompression + +#### DwarFS files with header +## We search for a DWARFS magic in the first 64k of the file (images with +## headers longer than 64k won't be recognized), then validate by checking +## the block count / section type to be all zeros for the first block. +## Finally, we check that the *next* block also has the correct DWARFS magic. +## If we find a DWARFS magic that doesn't pass validation, we continue with +## an indirect match recursively. +1 search/65536/b DWARFS +>&0x2A string/b \0\0\0\0\0\0 +>>&(&0x02.q+0x0A) string DWARFS DwarFS File System Image (with header) +>>>&0 use dwarfsversion +>>&0 use dwarfscompression +>&-1 indirect x |