Package: file Version: 1:5.32-1 Severity: important Tags: upstream Control: affects -1 diffoscope
Dear Maintainer, (I would have filed this upstream but their bug tracker was down.) In developing diffoscope we've come across many cases of file(1) misdetecting other things as DOS/MBR boot sector. I've been dismissing these as corner cases but now there are just too many to ignore. One example is attached. $ file control.tar.gz control.tar.gz: DOS/MBR boot sector; partition 1 : ID=0xd8, [..] I git cloned https://github.com/file/file and ran my tests: | (master)$ git clean -fdx && git reset --hard && autoreconf -i && ./configure && make && src/file -m magic/magic:magic/magic.mgc ../control.tar.gz | [..] | ../control.tar.gz: DOS/MBR boot sector; partition 1 : [..] After some experimenting I found a good commit: | $ git checkout FILE5_00 | $ git clean -fdx && git reset --hard && autoreconf -i && ./configure && make && src/file -m magic/magic:magic/magic.mgc ../control.tar.gz | [..] | ../control.tar.gz: gzip compressed data, from Unix, max compression So we have a good and a bad revision, let's run a git-bisect then. $ git bisect start $ git bisect good FILE5_00 $ git bisect bad origin/master $ git bisect run sh -c 'git clean -fdx && git reset --hard && autoreconf -i && ./configure && make && src/file -m magic/magic:magic/magic.mgc ../control.tar.gz | grep -i gzip; x=$?; git reset --hard; git clean -fdx; exit $x' [..] 51ceb2bd7a728fb307f190ee68fe53cd0392fb28 is the first bad commit commit 51ceb2bd7a728fb307f190ee68fe53cd0392fb28 Author: Christos Zoulas <[email protected]> Date: Fri Oct 12 16:10:39 2012 +0000 from Joerg Jenderek Hi, 2 files (TDSK-5120x32b.img and TDSK-5120x64b.img ) in directory bootsector are characterized wrong ( see output bootsector-5.11.txt) . [..] :040000 040000 b0a083f5b8453b812de42749e612aff7673b42f3 ef0015db2bdd886d15d6993c66d6562fed5572e6 M magic bisect run success X -- System Information: Debian Release: buster/sid APT prefers testing APT policy: (990, 'testing'), (500, 'unstable-debug'), (500, 'testing-debug'), (500, 'buildd-unstable'), (300, 'unstable'), (100, 'experimental'), (1, 'experimental-debug') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 4.12.0-1-amd64 (SMP w/4 CPU cores) Locale: LANG=en_GB.utf8, LC_CTYPE=en_GB.utf8 (charmap=UTF-8), LANGUAGE=en_GB:en (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) Versions of packages file depends on: ii libc6 2.24-17 ii libmagic1 1:5.32-1 ii zlib1g 1:1.2.8.dfsg-5 file recommends no packages. file suggests no packages. -- no debconf information
