On Sun, Feb 06, 2011 at 09:13:59PM +0000, Lisi wrote: > On Sunday 06 February 2011 20:35:17 Eduardo M KALINOWSKI wrote: > > On 02/06/2011 06:27 PM, Lisi wrote: > > > I need to find out: > > > a)What the magic number should be for certain types of file and > > > b)Whether a specific file of that type has the correct magic number. > > > > > > Here is my one, so far futile, effort - in addition to googling until I > > > can see magic numbered smoke coming out of my ears. :-( > > > > > > lisi@Tux:~$ cat /usr/share/misc/magic.mgc | grep gzip > > > Binary file (standard input) matches > > > lisi@Tux:~$ > > > > > > I realise that this is more specific to UNIX than specific to Debian - > > > but it applies to all the UNIX family, and Debian is part of that family. > > > ;-) > > > > That's a binary file, it won't help you much. > > > > See the corresponding source package, you should find the same > > information in that file in a more readable way. > > > > > > -- > > "We shall reach greater and greater platitudes of achievement." > > -- Richard J. Daley > > > > Eduardo M KALINOWSKI > > edua...@kalinowski.com.br > > Source code failed because I couldn't find the source code. The gzip that I > have is a Debian package, and no source code is offered. BUT > > lisi@Tux:~$ cat /usr/share/misc/magic | grep gzip > # still uses gzip for the control.tar (first in the archive). Only > #>84 string gz \b, uses gzip compression > >>14 beshort 0x677a (gzipped) > >>14 beshort !0x677a (not gzipped) > >>36 belong&0x4 0x4 gzip > # compress, gzip, pack, compact, huf, squeeze, crunch, freeze, yabba, etc. > # gzip (GNU zip, not to be confused with Info-ZIP or PKWARE zip archiver) > 0 string \037\213 gzip compressed data > !:mime application/x-gzip > 0 string \037\236 frozen file 1.0 (or gzip 0.5) > # + gzipped tarball files > >512 string \037\213 \b, gzipped > >>0x2744 lelong 1 gzip compressed > 0 string llvc1 LLVM byte-codes, gzip compression > #>65 string Gzip (GNU gzip) > #>69 string Gzip (GNU gzip) > >4 string GZ (gzip compressed) > >20 belong 2 gzipped > lisi@Tux:~$ > > So all I have to do now is a) interpret it and b) find the, hopefully > matching, code in a specific file! > > > Thanks for your help. > > Lisi > > > -- > To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org > with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org > Archive: http://lists.debian.org/201102062114.00115.lisi.re...@gmail.com
I find that running "file" on an unknown file may give me more or less usable information. GNU implementation of file "knows" some magic numbers and applies them to give a best guess as to what an unkown file is. Hope this helps, All the best AndyC -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20110206220133.ga24...@galactic.demon.co.uk
