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From: jdoubleu <hi@jdoubleu.de>
To: Jeff Johnston <jjohnstn@redhat.com>
Cc: newlib@sourceware.org
Subject: Re: [PATCH] add tests for tzset(3)
Date: Thu, 12 May 2022 20:35:53 +0200	[thread overview]
Message-ID: <361f9d4b-38ae-894d-e7a4-65a5ae3afb18@jdoubleu.de> (raw)
In-Reply-To: <CAOox84vEt8sb7HaUNFDa=MRbk_wQPj-7LQbF+rbcVKn==Hp1QQ@mail.gmail.com>

Hi Jeff,

I finally found some time to have a look at your patch.
>       if (sscanf (tzenv, "%10[-+0-9A-Za-z]%n", __tzname_std, &n) <= 0
> 		|| n < TZNAME_MIN || TZNAME_MAX < n || '>' != tzenv[n])

> +      else if (n < TZNAME_MIN || TZNAME_MAX < n)

I think the sub-expression "TZNAME_MAX < n" can never be true, can it? 
sscanf will always stop after 10 characters.

What do you think about including the TZNAME_MAX macro inside the format 
string?

> #define STR(s) #s
> #define STR_LIT(s) STR(s)
> ...
> sscanf(tzenv, "%" STR_LIT(TZNAME_MAX) "[-+0-9A-Za-z]%n", __tzname_dst, &n)

I'll try to update the tests in the coming days, so I can verify your 
changes work as expected.


Cheers
---
🙎🏻‍♂️ jdoubleu
On 4/29/2022 5:46 PM, Jeff Johnston wrote:
> I have revised my tzset_r.c patch so that the tzrules are initialized so we
> don't inherit the previous settings if not specified for a particular TZ.
> As well, I defaulted them if TZ is not specified.
> 
> -- Jeff J.

  reply	other threads:[~2022-05-12 18:36 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-29 15:46 Jeff Johnston
2022-05-12 18:35 ` jdoubleu [this message]
2022-05-16 17:49   ` Jeff Johnston
  -- strict thread matches above, loose matches on Subject: below --
2022-04-07 15:58 jdoubleu
2022-04-08 21:21 ` Jeff Johnston
2022-04-10  8:43 ` Dimitar Dimitrov
2022-04-10 17:55   ` jdoubleu
2022-04-10 21:00     ` Dimitar Dimitrov
2022-04-11 11:17       ` jdoubleu
2022-04-11 17:27         ` Dimitar Dimitrov
2022-04-12 11:19           ` jdoubleu
2022-04-12 18:33             ` Brian Inglis
2022-04-07 23:34               ` [PATCH v2 0/2] add tzset/_r POSIX angle bracket <> support in TZ env var Brian Inglis
2022-04-13 17:53                 ` [PATCH] add tests for tzset(3) Brian Inglis
2022-04-13 20:33                   ` Jeff Johnston
2022-04-13 22:19                     ` Brian Inglis
2022-04-14  8:59                       ` jdoubleu
2022-04-14 16:31                         ` Brian Inglis
2022-04-14 19:23                           ` Jeff Johnston
2022-04-15 10:10                             ` jdoubleu
2022-04-27 19:30                               ` Jeff Johnston
2022-05-14 14:39                         ` jdoubleu
2022-05-16 16:05                           ` Dimitar Dimitrov
2022-05-16 17:38                             ` Jeff Johnston
2022-04-13 22:21               ` Brian Inglis

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