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Date:      Thu, 13 Jun 2002 02:28:33 +0200
From:      Frank v Waveren <fvw@var.cx>
To:        parv <parv@pair.com>
Cc:        freebsd-bugs@freebsd.org
Subject:   Re: bin/39198: sh aborts on variables with periods
Message-ID:  <1023927778RGL.fvw@yendor.var.cx>
In-Reply-To: <20020613002018.GA38200@moo.holy.cow>
References:  <200206122010.g5CKA3L09165@freefall.freebsd.org> <20020612214110.GA30199@moo.holy.cow> <1023918173HKC.fvw@yendor.var.cx> <20020613002018.GA38200@moo.holy.cow>

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On Wed, Jun 12, 2002 at 08:20:18PM -0400, parv wrote:
> oh, come on, i am merely conveying what i got in the mail!
The criticism was mostly directed at the author of the text, and no
offence intended to anyone...

> anyway, i tried...
> ...the above more than three times each in bash-2.05 &
> ksh93-20020317 (i.e. more than 3 * 2 * 2^16 times) and did not get
> any utterance of 'same'.  not that that proves anything...
it's quite possible that bash uses for instance a linear PRNG in which
case it's not entirely unlikely that depending on configuration the
same number will never be created twice in succession. However, this
behaviour is not in the spec and thus not guaranteed. It could change,
sneaking up behind you and brutally mutilating your scripts in the
process. Trusting on it would be unwise.

-- 
Frank v Waveren                                      Fingerprint: 0EDB 8787
fvw@[var.cx|stack.nl|dse.nl|chello.nl] ICQ#10074100     09B9 6EF5 6425 B855
Public key: hkp://wwwkeys.pgp.net/fvw@var.cx            7179 3036 E136 B85D

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