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From: gm@lmi-angel.UUCP (Greg McGary)
Newsgroups: comp.unix.wizards
Subject: Re: a new (?) twist on filesystem backups
Message-ID: <100@lmi-angel.UUCP>
Date: Mon, 24-Nov-86 12:13:45 EST
Article-I.D.: lmi-ange.100
Posted: Mon Nov 24 12:13:45 1986
Date-Received: Tue, 25-Nov-86 10:16:51 EST
References: <269@ima.UUCP>
Distribution: world
Organization: LISP Machine, Inc; Cambridge Engineering Headquarters
Lines: 36
Summary: Add a `-mount' option to find(1)

In article <269@ima.UUCP>, trb@ima.UUCP (Andrew Tannenbaum) writes:
> As we know, cpio likes a list of files on standard input.  Problem is,
> people normally use find to generate that list, but it happily crosses
> filesystem boundaries.  How to generate a list of files on a filesystem
> for cpio?  find | grep -v?  No, ncheck!

I added a `-mount' option to our find(1) to prevent it from traversing
mount points. E.g.

	find / -mount -print

gets you the root and nothing else.

I also added a `-magic' option for checking magic numbers.  You can
specify short or long integers in any radix and also strings.  This is
particularly useful for making source distributions from a hierarchy
that is littered with .o's, load-modules, cpio images, and archives
crated by ar(1).  E.g.

	find /src -magic 0520 -magic 070707 -smagic 070707 \
		-smagic "<ar>" -smagic "!<arch>" -print

excludes m68k COFF files, cpio archives, cpio archives with
ascii-headers, plus old and new-style System-V archives.  If you wish
to include files with particular magic numbers, `+magic' does so for
integer magic-numbers and `+smagic' does it for string magic-numbers.
If the integer magic-number is a long, append `L' or `l' to the
digits.

I vaguely recall that there was a discussion some months ago about
enhancements to find(1).  Unfortunately, I missed.  If someone has a
summary of the discussion, please forward it to me.
-- 
-- Greg McGary        {decvax!cca,harvard,mit-eddie}!lmi-angel!gm
--
``Make something of yourself! ... Try a casserole!''