Re: bin/50960: /bin/sh generates incorrect value for && and || inside $(( ))

[<Paul_Koning%Dell.com@localhost>]

The following reply was made to PR bin/50960; it has been noted by GNATS.

From: <Paul_Koning%Dell.com@localhost>
To: <gnats-bugs%NetBSD.org@localhost>
Cc: <gnats-admin%netbsd.org@localhost>, <netbsd-bugs%netbsd.org@localhost>
Subject: Re: bin/50960: /bin/sh generates incorrect value for && and ||
 inside $(( ))
Date: Sat, 12 Mar 2016 21:34:59 +0000

 > On Mar 12, 2016, at 3:55 PM, <kre%munnari.OZ.AU@localhost> <kre%munnari.OZ.AU@localhost> wrot=
 e:
 >=20
 >> ...
 > 	The logical && and || operators are supposed to generate a boolean
 > 	value (which should be 0 for false and 1 for true, the same as
 > 	is done in C).  Currently they generate 0 for false, ad non-zero
 > 	for true (where the non-zero will be whichever of the operand
 > 	values was decisive in determining the answer is not false, ie:
 > 	the RHS for &&, or the LHS for ||).
 
 Actually, 0 for true and non-zero for false, a very confusion shell rule.  =
 But yes, other shells don't do this.  Then again, it's analogous to what Py=
 thon does, for what little that's worth.
 
 	paul