Short: Determine file MIME type from its contents

Author: Ian Darwin, Christos Zoulas et al

Uploader: Cameron Armstrong (Nightfox) <cameronscottarmstrong@gmail.com>

Type: util/misc

Version: 5.48

Architecture: m68k-amigaos >= 2.0; ppc-amigaos; ppc-morphos

Amiga port of the "file" UNIX app. It identifies the type of a file by

inspecting its contents rather than trusting its name or filenote. It

recognises several thousand formats, from Amiga hunk executables and IFF

containers through to modern archive, image, audio and document types.

This is a port of the standard Unix file(1), version 5.48. Native binaries

are included for AmigaOS 3 (68k), AmigaOS 4 (PPC) and MorphOS (PPC).

Installation

Copy the contents of the C/ directory for your system to C:, e.g. on

AmigaOS 3:

copy file/AmigaOS3/C/#? C:

Both the "file" command and its magic database "magic.mgc" belong in C:.

The command looks for the database next to itself, so keeping them

together is all that is required.

Usage

file <name> identify one or more files

file -i <name> print a MIME type instead of a description

file -b <name> omit the filename from the output

file --help full option list

Examples:

1> file C:file

C:file: AmigaOS loadseg()ble executable/binary

1> file -i Work:Pictures/photo.jpg

Work:Pictures/photo.jpg: image/jpeg

Notes

Compressed-file inspection using external decompressors is not available:

AmigaOS provides no sigaction(), and clib2 no pipe(), so that code path is

compiled out. Reading compressed files directly is unaffected.

The developer SDK (static libmagic.a libraries and magic.h) is distributed

separately as magic.lha.

Licence

BSD-style; see COPYING in the source distribution.