FILE. Program to identify a file's format by scanning binary data for known patterns.

twobob · 05-12-2013, 10:09 PM

Program to identify a file's format by scanning binary data
for known patterns.

ftp://ftp.astron.com/pub/file/

built for all kindles AFAIK

Expects to live in /mnt/us/extensions/file

Called like:

Code:

[root@kindle root]# /mnt/us/extensions/file/file 
Usage: file.bin [-bchikLlNnprsvz0] [--apple] [--mime-encoding] [--mime-type]
            [-e testname] [-F separator] [-f namefile] [-m magicfiles] file ...
       file.bin -C [-m magicfiles]
       file.bin [--help]

(Thanks matan for pointing out the errors)

Matan · 05-13-2013, 11:03 AM

This binary is linked dynamically to libmagic.so, which is not available (by default) at least on Kindle keyboard.

Furthermore, this program (through libmagic) uses an external file which includes the information on how to recognize files, therefore you need to include this file in your archive (and probably modify libmagic to look for it by default under /mnt/us if you want the file to be installable without remounting the root filesystem).

knc1 · 05-13-2013, 11:34 AM

Right!
It is easy to miss those dynamically loaded libraries in the build of an application.
(It should have been a dependency in BuildRoot - gotta send them a note)

@TwoBob: Why not make the file and libmagic.so our first occupant of */extensions/system ?
https://bitbucket.org/twobob/kual-system

Gotta introduce that at some point.

twobob · 05-13-2013, 12:59 PM

Quote:

Originally Posted by Matan

This binary is linked dynamically to libmagic.so, which is not available (by default) at least on Kindle keyboard.

Furthermore, this program (through libmagic) uses an external file which includes the information on how to recognize files, therefore you need to include this file in your archive (and probably modify libmagic to look for it by default under /mnt/us if you want the file to be installable without remounting the root filesystem).

Right. Fixed that up.

Quote:

Originally Posted by knc1

Right!
...
@TwoBob: Why not make the file and libmagic.so our first occupant of */extensions/system ?
https://bitbucket.org/twobob/kual-system

Gotta introduce that at some point.

A decent plan for sure. I'll have to rebuild the libmagic.so at some point then.
I got around it by using strace to check what locations it DOES check for magic.mgc in and ~/.magic was one of them...

All errors fixed up now.

05-13-2013, 11:34 AM	#3
knc1 Going Viral Posts: 17,212 Karma: 18210809 Join Date: Feb 2012 Location: Central Texas Device: No K1, PW2, KV, KOA	Right! It is easy to miss those dynamically loaded libraries in the build of an application. (It should have been a dependency in BuildRoot - gotta send them a note) @TwoBob: Why not make the file and libmagic.so our first occupant of /extensions/system ? https://bitbucket.org/twobob/kual-system Gotta introduce that at some point. Last edited by knc1; 05-13-2013 at 11:37 AM.*

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05-13-2013, 11:03 AM	#2
Matan Enthusiast Posts: 42 Karma: 39432 Join Date: May 2011 Device: none	This binary is linked dynamically to libmagic.so, which is not available (by default) at least on Kindle keyboard. Furthermore, this program (through libmagic) uses an external file which includes the information on how to recognize files, therefore you need to include this file in your archive (and probably modify libmagic to look for it by default under /mnt/us if you want the file to be installable without remounting the root filesystem).

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