04-24-2014
The exec() in the kernel uses a simple rule, like the rules in /etc/magic. While /etc/magic is only used by the file command.
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fileutil::magic::cgen(3tcl) file utilities fileutil::magic::cgen(3tcl)
__________________________________________________________________________________________________________________________________________________
NAME
fileutil::magic::cgen - Generator core for compiler of magic(5) files
SYNOPSIS
package require Tcl 8.4
package require fileutil::magic::cgen ?1.0?
package require fileutil::magic::rt ?1.0?
package require struct::tree
package require struct::list
::fileutil::magic::cgen::2tree script
::fileutil::magic::cgen::treedump tree
::fileutil::magic::cgen::treegen tree node
_________________________________________________________________
DESCRIPTION
This package provides the generator backend for a compiler of magic(5) files into recognizers based on the fileutil::magic::rt recognizer
runtime package. For the compiler frontend using this generator see the package fileutil::magic::cfront.
COMMANDS
::fileutil::magic::cgen::2tree script
This command converts the recognizer specified by the script into a tree and returns the object command of that tree as its result.
It uses the package struct::tree for the tree.
The script is in the format specified by magic(5).
::fileutil::magic::cgen::treedump tree
This command takes a tree as generated by ::fileutil::magic::cgen::2tree and returns a string encoding the tree for human consump-
tion, to aid in debugging.
::fileutil::magic::cgen::treegen tree node
This command takes a tree as generated by ::fileutil::magic::cgen::2tree and returns a Tcl script, the recognizer for the file types
represented by the sub-tree rooted at the node. The generated script makes extensive use of the commands provided by the recognizer
runtime package fileutil::magic::rt to perform its duties.
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
CATEGORY
Programming tools
fumagic 1.0 fileutil::magic::cgen(3tcl)