ebefd0d08f
Adds lots of neat features from most other vendors file(1) commands, plus (important!) little and big endian file types. This will alow us to detect and extract meaningful information from a many more file types.
89 lines
3.8 KiB
Plaintext
89 lines
3.8 KiB
Plaintext
** README for file(1) Command **
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@(#) $Id: README,v 1.2 1993/06/10 00:38:01 jtc Exp $
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This is Release 3.x of Ian Darwin's (copyright but distributable)
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file(1) command. Release 3.x is scheduled for inclusion in the
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4.4 BSD (Berkeley Software Distribution) of UNIX-like
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software, and is the standard "file" command for Linux, 386bsd,
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and other systems. (See "patchlevel.h" for the exact release number).
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UNIX is a trademark of UNIX System Laboratories.
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The prime contributor to Release 3.8 was Guy Harris, who put in megachanges
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including byte-order independance.
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The prime contributor to Release 3.0 was Christos Zoulas, who put
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in hundreds of lines of source code changes, including his own
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ANSIfication of the code (I liked my own ANSIfication better, but
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his (__P()) is the "Berkeley standard" way of doing it, and I wanted UCB
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to include the code...), his HP-like "indirection" (a feature of
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the HP file command, I think), and his mods that finally got the
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uncompress (-z) mode finished and working.
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This release has compiled in numerous environments; see PORTING
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for a list and problems.
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This fine freeware file(1) follows the USG (System V) model of the file
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command, rather than the Research (V7) version or the V7-derived 4.[23]
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Berkeley one. That is, the file /etc/magic contains much of the ritual
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information that is the source of this program's power. My version
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knows a little more magic (including tar archives) than System V; the
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/etc/magic parsing seems to be compatible with the (poorly documented)
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System V /etc/magic format (with one exception; see the man page).
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In addition, the /etc/magic file is built from a subdirectory
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for easier(?) maintenance. I will act as a clearinghouse for
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magic numbers assigned to all sorts of data files that
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are in reasonable circulation. Send your magic numbers,
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in magic(4) format please, to the author, Ian Darwin.
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LEGAL.NOTICE - read this first.
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README - read this second (you are currently reading this file).
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PORTING - read this only if the program won't compile.
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Makefile - read this next, adapt it as needed (particularly
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the location of the old existing file command and
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the man page layouts), type "make" to compile,
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"make try" to try it out against your old version.
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Expect some diffs, particularly since your original
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file(1) may not grok the imbedded-space ("\ ") in
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the current magic file, or may even not use the
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magic file.
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apprentice.c - parses /etc/magic to learn magic
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ascmagic.c - third & last set of tests, based on hardwired assumptions.
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core - not included in distribution due to mailer limitations.
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debug.c - includes -c printout routine
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file.1 - man page for the command
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magic.4 - man page for the magic file, courtesy Guy Harris.
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Install as magic.4 on USG and magic.5 on V7 or Berkeley; cf Makefile.
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file.c - main program
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file.h - header file
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fsmagic.c - first set of tests the program runs, based on filesystem info
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is_tar.c - knows about tarchives (courtesy John Gilmore).
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magdir - directory of /etc/magic pieces
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magdir/Makefile - ADJUST THIS FOR YOUR CONFIGURATION
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names.h - header file for ascmagic.c
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softmagic.c - 2nd set of tests, based on /etc/magic
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strtok.c, getopt.c - in case you them (courtesy of Henry Spencer).
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strtol.c, strchr.c - in case you need them - public domain.
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tst - simple test suite, built from tst/Makefile
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Ian Darwin
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Darwin Open Systems
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R R 1
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Palgrave, Ontario L0N 1P0
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Canada
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E-mail: darwin@cs.toronto.edu
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ian@sq.com
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utzoo!ian
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ian@darwin.uucp
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uunet!sq!ian
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Phone: Do not even think of telephoning me about this program. Send cash first!
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Parts of this software were developed at SoftQuad Inc., 56 Aberfoyle
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Cres, # 810, Toronto, Ontario CANADA M8X 2W4. Phone: 416-239-4801 or
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800-387-2777. Email: mail@sq.com. Call for information on SGML editing
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and browsing, Unix text processing, and customised products on Unix,
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DOS and Mac.
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