06-15-2011
There is a program called file which uses a database of "magic numbers" ( /usr/share/magic) to determine the content-type of a file.
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LEARN ABOUT REDHAT
mimetypes
fileutil::magic::mimetype(n) file utilities fileutil::magic::mimetype(n)
__________________________________________________________________________________________________________________________________________________
NAME
fileutil::magic::mimetype - Procedures implementing mime-type recognition
SYNOPSIS
package require Tcl 8.4
package require fileutil::magic::mimetype ?1.0.2?
::fileutil::magic::mimetype filename
_________________________________________________________________
DESCRIPTION
This package provides a command for the recognition of file types in pure Tcl. The output is standardized to mime-types.
The core part of the recognizer was generated from a "magic(5)" file containing the checks to perform to recognize files, and associated
mime-types.
::fileutil::magic::mimetype filename
This command is similar to the command fileutil::fileType.
The output of the command for the specified file is not a list of attributes describing the type of the file, but a list of standard
mime-types the file may have.
This list will be empty if the type of the file is not recognized.
REFERENCES
[1] File(1) sources [ftp://ftp.astron.com/pub/file/] This site contains the current sources for the file command, including the magic
definitions used by it. The latter were used by us to generate this recognizer.
BUGS, IDEAS, FEEDBACK
This document, and the package it describes, will undoubtedly contain bugs and other problems. Please report such in the category fileutil
:: magic of the Tcllib SF Trackers [http://sourceforge.net/tracker/?group_id=12883]. Please also report any ideas for enhancements you may
have for either package and/or documentation.
SEE ALSO
file(1), fileutil, magic(5)
KEYWORDS
file recognition, file type, file utilities, mime, type
fumagic 1.0.2 fileutil::magic::mimetype(n)