bin/169500: /bin/expr improperly requires forward slash to be escaped

Chris Rees crees at
Thu Jun 28 22:28:03 UTC 2012

On 28 June 2012 23:20, Ronald F. Guilmette <rfg at> wrote:
> The following reply was made to PR bin/169500; it has been noted by GNATS.
> From: "Ronald F. Guilmette" <rfg at>
> To: Garrett Wollman <wollman at>
> Cc: freebsd-gnats-submit at
> Subject: Re: bin/169500: /bin/expr improperly requires forward slash to be escaped
> Date: Thu, 28 Jun 2012 15:11:55 -0700
>  In message <201206280136.q5S1aOQO093902 at>, you wrote:
>  >In article <20120627214105.A1EA35081B at>,
>  >rfg at writes:
>  >
>  >>According to my reading of Sections and of the ANSI/IEEE
>  >>standard 1003.2, a forward slash character (/) is an "ordinary" basic
>  >>regular expression (BRE) character, and as such can be used in a BRE alone
>  >>to match itself.
>  >
>  >IEEE Std.1003.2 was obsoleted by the publication of IEEE
>  >Std.1003.1-2001; your reference is at least fifteen years old.
>  Yes.  My bad.  Sorry.
>  (These publications are quite expensive, as you may know, and thus, I have
>  not updated mine in quite some time.)
>  >>As far as I can tell, backslash-escaping of this specific character
>  >>should not be required within BREs.
>  >
>  >Nothing to do with the BRE-ness.  As the 2001 edition of the standard
>  >states (page 429, lines 16598-16599):
>  >
>  >      A string argument is an argument that cannot be identified as
>  >      an integer argument or as one of the expression operator
>  >      symbols shown in the OPERANDS section.
>  Humm... OK.  How do I retract my PR?

No need, it's closed.  Don't worry about it :)


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