Re: Text file types
Re: Text file types
- Subject: Re: Text file types
- From: Sherm Pendley <email@hidden>
- Date: Wed, 5 Feb 2003 10:18:30 -0500
On Wednesday, February 5, 2003, at 07:12 AM, Angela Brett wrote:
My other question is, is there a method (perhaps something like
NSImage's - imageFileTypes) which I can use to determine whether a file
is likely to be some sort of text file? I don't mean just checking for
files with the .txt or .text extensions, I want to include other text
files such as html and C.
If you want to avoid checking for extensions and/or HFS file type, you
could use magic. First you need some candles and a chicken... Just
kidding. :-)
Seriously though - the UNIX 'file' command looks for, among other
things, magic numbers that appear at specific points in various file
types. You could leverage this in one of two ways:
Either run the 'file' command on each file you're interested in, and
examine the command's output.
Or, you can directly use the magic-number database yourself, and
duplicate the file command's functionality in your app. The database is
in /etc/magic, and its format - which is quite simple - is described in
the 'magic' man page.
sherm--
If you listen to a UNIX shell, can you hear the C?
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