80 lines
3.7 KiB
Plaintext
80 lines
3.7 KiB
Plaintext
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** README for file(1) Command **
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@(#) $Id: README,v 1.20 1993/09/23 21:47:01 christos 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 maintainer, Christos Zoulas.
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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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E-mail: christos@deshaw.com, moraes@deshaw.com
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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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