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run-tests/util: fix compatibility with openSUSE's file command
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OpenSUSE has a non-standard magic data file for the 'file' command.
(It's gratuitiously different from the version of 'file' shipped with
Debian, Fedora, and MacOS.  Sigh...)  To work around this unfortunate
situation, include an excerpted version of the magic file from the
file version 5.45 and use it when trying to determine the architecture
of a compiled kernel.

Tested on Debian, Fedora, openSUSE, and MacOS.

Signed-off-by: Theodore Ts'o <[email protected]>
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@tytso
tytso committed Nov 7, 2024
1 parent 71bcf39 commit ac16929
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2 changes: 1 addition & 1 deletion run-fstests/util/arch-funcs
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Original file line number Diff line number Diff line change
Expand Up @@ -114,7 +114,7 @@ function get_kernel_file_info () {
echo "get-kernel-arch: file not found: $KERNEL" >&2
exit 1
fi
info=$(file "$KERNEL" | sed -e "s;$KERNEL: ;;")
info=$(file -m "$DIR/util/kernel-magic" "$KERNEL" | sed -e "s;$KERNEL: ;;")
case "$info" in
"Linux kernel"*)
KERNEL_ARCH=$(echo $info | tr A-Z a-z |awk '{print $3}')
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189 changes: 189 additions & 0 deletions run-fstests/util/kernel-magic
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Original file line number Diff line number Diff line change
@@ -0,0 +1,189 @@
# Magic numbers for Linux kernels and Debian Archive files Used by
# util/arch-funcs; excerpted from the sources from the "file" sources
# version 5.45-3+b1

#
# Linux kernel boot images, from Albert Cahalan <[email protected]>
# and others such as Axel Kohlmeyer <[email protected]>
# and Nicolas Lichtmaier <[email protected]>
# All known start with: b8 c0 07 8e d8 b8 00 90 8e c0 b9 00 01 29 f6 29
# Linux kernel boot images (i386 arch) (Wolfram Kleff)
# URL: https://www.kernel.org/doc/Documentation/x86/boot.txt
514 string HdrS Linux kernel
!:strength + 55
# often no extension like in linux, vmlinuz, bzimage or memdisk but sometimes
# Acronis Recovery kernel64.dat and Plop Boot Manager plpbtrom.bin
# DamnSmallLinux 1.5 damnsmll.lnx
!:ext /dat/bin/lnx
>510 leshort 0xAA55 x86 boot executable
>>518 leshort >0x1ff
>>>529 byte 0 zImage,
>>>529 byte 1 bzImage,
>>>526 lelong >0
>>>>(526.s+0x200) string >\0 version %s,
>>498 leshort 1 RO-rootFS,
>>498 leshort 0 RW-rootFS,
>>508 leshort >0 root_dev %#X,
>>502 leshort >0 swap_dev %#X,
>>504 leshort >0 RAMdisksize %u KB,
>>506 leshort 0xFFFF Normal VGA
>>506 leshort 0xFFFE Extended VGA
>>506 leshort 0xFFFD Prompt for Videomode
>>506 leshort >0 Video mode %d
# This also matches new kernels, which were caught above by "HdrS".
0 belong 0xb8c0078e Linux kernel
>0x1e3 string Loading version 1.3.79 or older
>0x1e9 string Loading from prehistoric times

# System.map files - Nicolas Lichtmaier <[email protected]>
8 search/1 \ A\ _text Linux kernel symbol map text

# LSM entries - Nicolas Lichtmaier <[email protected]>
0 search/1 Begin3 Linux Software Map entry text
0 search/1 Begin4 Linux Software Map entry text (new format)

# From Matt Zimmerman, enhanced for v3 by Matthew Palmer
0 belong 0x4f4f4f4d User-mode Linux COW file
>4 belong <3 \b, version %d
>>8 string >\0 \b, backing file %s
>4 belong >2 \b, version %d
>>32 string >\0 \b, backing file %s

############################################################################
# Linux kernel versions

0 string \xb8\xc0\x07\x8e\xd8\xb8\x00\x90 Linux
>497 leshort 0 x86 boot sector
>>514 belong 0x8e of a kernel from the dawn of time!
>>514 belong 0x908ed8b4 version 0.99-1.1.42
>>514 belong 0x908ed8b8 for memtest86

>497 leshort !0 x86 kernel
>>504 leshort >0 RAMdisksize=%u KB
>>502 leshort >0 swap=%#X
>>508 leshort >0 root=%#X
>>>498 leshort 1 \b-ro
>>>498 leshort 0 \b-rw
>>506 leshort 0xFFFF vga=normal
>>506 leshort 0xFFFE vga=extended
>>506 leshort 0xFFFD vga=ask
>>506 leshort >0 vga=%d
>>514 belong 0x908ed881 version 1.1.43-1.1.45
>>514 belong 0x15b281cd
>>>0xa8e belong 0x55AA5a5a version 1.1.46-1.2.13,1.3.0
>>>0xa99 belong 0x55AA5a5a version 1.3.1,2
>>>0xaa3 belong 0x55AA5a5a version 1.3.3-1.3.30
>>>0xaa6 belong 0x55AA5a5a version 1.3.31-1.3.41
>>>0xb2b belong 0x55AA5a5a version 1.3.42-1.3.45
>>>0xaf7 belong 0x55AA5a5a version 1.3.46-1.3.72
>>514 string HdrS
>>>518 leshort >0x1FF
>>>>529 byte 0 \b, zImage
>>>>529 byte 1 \b, bzImage
>>>>(526.s+0x200) string >\0 \b, version %s

# Linux boot sector thefts.
0 belong 0xb8c0078e Linux
>0x1e6 belong 0x454c4b53 ELKS Kernel
>0x1e6 belong !0x454c4b53 style boot sector

############################################################################
# Linux S390 kernel image
# Created by: Jan Kaluza <[email protected]>
8 string \x02\x00\x00\x18\x60\x00\x00\x50\x02\x00\x00\x68\x60\x00\x00\x50\x40\x40\x40\x40\x40\x40\x40\x40 Linux S390
>0x00010000 search/b/4096 \x00\x0a\x00\x00\x8b\xad\xcc\xcc
# 64bit
>>&0 string \xc1\x00\xef\xe3\xf0\x68\x00\x00 Z10 64bit kernel
>>&0 string \xc1\x00\xef\xc3\x00\x00\x00\x00 Z9-109 64bit kernel
>>&0 string \xc0\x00\x20\x00\x00\x00\x00\x00 Z990 64bit kernel
>>&0 string \x00\x00\x00\x00\x00\x00\x00\x00 Z900 64bit kernel
# 32bit
>>&0 string \x81\x00\xc8\x80\x00\x00\x00\x00 Z10 32bit kernel
>>&0 string \x81\x00\xc8\x80\x00\x00\x00\x00 Z9-109 32bit kernel
>>&0 string \x80\x00\x20\x00\x00\x00\x00\x00 Z990 32bit kernel
>>&0 string \x80\x00\x00\x00\x00\x00\x00\x00 Z900 32bit kernel

############################################################################
# Linux ARM compressed kernel image
# From: Kevin Cernekee <[email protected]>
# Update: Joerg Jenderek
0x24 lelong 0x016f2818 Linux kernel ARM boot executable zImage
# There are three possible situations: LE, BE with LE bootloader and pure BE.
# In order to aid telling these apart a new endian flag was added. In order
# to support kernels before the flag and BE with LE bootloader was added we'll
# do a negative check against the BE variant of the flag when we see a LE magic.
>0x30 belong !0x04030201 (little-endian)
# raspian "kernel7.img", Vu+ Ultimo4K "kernel_auto.bin"
!:ext img/bin
>0x30 belong 0x04030201 (big-endian)
0x24 belong 0x016f2818 Linux kernel ARM boot executable zImage (big-endian)

############################################################################
# Linux AARCH64 kernel image
0x38 lelong 0x644d5241 Linux kernel ARM64 boot executable Image
>0x18 lelong ^1 \b, little-endian
>0x18 lelong &1 \b, big-endian
>0x18 lelong &2 \b, 4K pages
>0x18 lelong &4 \b, 16K pages
>0x18 lelong &6 \b, 32K pages

#
# Debian package; it's in the portable archive format, and needs to go
# before the entry for regular portable archives, as it's recognized as
# a portable archive whose first member has a name beginning with
# "debian".
#
# Update: Joerg Jenderek
# URL: https://en.wikipedia.org/wiki/Deb_(file_format)
0 string =!<arch>\ndebian
# https://manpages.debian.org/testing/dpkg/dpkg-split.1.en.html
>14 string -split part of multipart Debian package
!:mime application/vnd.debian.binary-package
# udeb is used for stripped down deb file
!:ext deb/udeb
>14 string -binary Debian binary package
!:mime application/vnd.debian.binary-package
# For ipk packager see also https://en.wikipedia.org/wiki/Opkg
!:ext deb/udeb/ipk
# This should not happen
>14 default x Unknown Debian package
# NL terminated version; for most Debian cases this is 2.0 or 2.1 for split
>68 string >\0 (format %s)
#>68 string !2.0\n
#>>68 string x (format %.3s)
>68 string =2.0\n
# 2nd archive name=control archive name like control.tar.gz or control.tar.xz
# or control.tar.zst
>>72 string >\0 \b, with %.15s
# look for 3rd archive name=data archive name like data.tar.{gz,xz,bz2,lzma}
>>0 search/0x93e4f data.tar. \b, data compression
# the above line only works if FILE_BYTES_MAX in ../../src/file.h is raised
# for example like libreoffice-dev-doc_1%3a5.2.7-1+rpi1+deb9u3_all.deb
>>>&0 string x %.2s
# skip space (0x20 BSD) and slash (0x2f System V) character marking end of name
>>>&2 ubyte !0x20
>>>>&-1 ubyte !0x2f
# display 3rd character of file name extension like 2 of bz2 or m of lzma
>>>>>&-1 ubyte x \b%c
>>>>>>&0 ubyte !0x20
>>>>>>>&-1 ubyte !0x2f
# display 4th character of file name extension like a of lzma
>>>>>>>>&-1 ubyte x \b%c
# split debian package case
>68 string =2.1\n
# dpkg-1.18.25/dpkg-split/info.c
# NL terminated ASCII package name like ckermit
>>&0 string x \b, %s
# NL terminated package version like 302-5.3
>>>&1 string x %s
# NL terminated MD5 checksum
>>>>&1 string x \b, MD5 %s
# NL terminated original package length
>>>>>&1 string x \b, unsplitted size %s
# NL terminated part length
>>>>>>&1 string x \b, part length %s
# NL terminated package part like n/m
>>>>>>>&1 string x \b, part %s
# NL terminated package architecture like armhf since dpkg 1.16.1 or later
>>>>>>>>&1 string x \b, %s

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