From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on inbox.vuxu.org
X-Spam-Level: 
X-Spam-Status: No, score=-1.0 required=5.0 tests=DKIM_ADSP_CUSTOM_MED,
	FREEMAIL_FROM,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE,SPF_PASS
	autolearn=ham autolearn_force=no version=3.4.2
Received: (qmail 15766 invoked from network); 16 Apr 2020 17:45:11 -0000
Received-SPF:  pass (primenet.com.au: domain of zsh.org
  designates 203.24.36.2 as permitted sender)
  receiver=inbox.vuxu.org; client-ip=203.24.36.2
  envelope-from=<zsh-users-return-24784-ml=inbox.vuxu.org@zsh.org>
Received: from ns1.primenet.com.au (HELO primenet.com.au) (203.24.36.2)
  by inbox.vuxu.org with UTF8ESMTPZ; 16 Apr 2020 17:45:11 -0000
Received: (qmail 12566 invoked by alias); 16 Apr 2020 17:45:05 -0000
Mailing-List: contact zsh-users-help@zsh.org; run by ezmlm
Precedence: bulk
X-No-Archive: yes
List-Id: Zsh Users List <zsh-users.zsh.org>
List-Post: <mailto:zsh-users@zsh.org>
List-Help: <mailto:zsh-users-help@zsh.org>
List-Unsubscribe: <mailto:zsh-users-unsubscribe@zsh.org>
X-Seq: 24784
Received: (qmail 26981 invoked by uid 1010); 16 Apr 2020 17:45:05 -0000
X-Qmail-Scanner-Diagnostics: from mail-io1-f53.google.com by f.primenet.com.au (envelope-from <pierpaolog@gmail.com>, uid 7791) with qmail-scanner-2.11 
 (clamdscan: 0.102.2/25779. spamassassin: 3.4.4.  
 Clear:RC:0(209.85.166.53):SA:0(-2.8/5.0):. 
 Processed in 2.04665 secs); 16 Apr 2020 17:45:05 -0000
X-Envelope-From: pierpaolog@gmail.com
X-Qmail-Scanner-Mime-Attachments: |
X-Qmail-Scanner-Zip-Files: |
Received-SPF: pass (ns1.primenet.com.au: SPF record at _netblocks.google.com designates 209.85.166.53 as permitted sender)
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=1e100.net; s=20161025;
        h=x-gm-message-state:mime-version:references:in-reply-to:from:date
         :message-id:subject:to:cc;
        bh=lywfvurBx2URwlgYULn+vDJeyI816bJzVKOUyp8mOj0=;
        b=VeBIx1dvFWuyqijxPzipOwGGKqkKcfNz/N/1OkE2SJkJzFSSmM5qLEYnA8V+MyuGsN
         FhpWfiLq1t6C6uwgggvpCxD+TL6v7LhWLiB5AT/d3/RoxiQTjMqt5YSqV729wKhMELgf
         vcQjBHv/JLdao7QEQW8Is3NFRXexQOytKNBaYmn9+drsPEKaOKRMRn8B2q/a5j05FaVp
         /lRV8xcph0d4Us4TaeU3JxAYPTx4bsvX76q1wUtindFbEI7kfhGysFRlEM76uuOCRrEB
         4iqOimUKjwtx057EzSPje3DYGubNt+VjBOKaZPkwVJHAjOQQZUgkIeC0W70iafa6emfF
         8yFA==
X-Gm-Message-State: AGi0PuYHLoQL4HQxCHeAXvqWMJMyLxELWNOSuUNegIzJ9terUflbwRGR
	VAt64EUA5vcv1C9fU+nAuc/AQUcGKXwT4rl7vVYShFJ7LQQ=
X-Google-Smtp-Source: APiQypICxkV53evNE2Sz4hjFOSMq7t/l/BWbqcRJnvpDIccNM4YpdfG3n1ay+x/idVBKmfi/65v8yiMgDtFToR93cg4=
X-Received: by 2002:a02:7b21:: with SMTP id q33mr31168979jac.24.1587059070497;
 Thu, 16 Apr 2020 10:44:30 -0700 (PDT)
MIME-Version: 1.0
References: <CAP+y1xCb3NJn8BRsuwpO6XVgzAtGsBvP870M5na3mAH+CwJ_OA@mail.gmail.com>
 <CAHYJk3TmiNicTrwem6iRxKMxdNT5-ZB8W8vT5Gc=t7DrbPfBdQ@mail.gmail.com>
 <CAP+y1xAG3ayQNE3JqeF_YOT5FZ9pLiUAF5TmPVoOv+nPyjK30A__22203.4378488146$1586994256$gmane$org@mail.gmail.com>
 <20200416163022.vremvngrnnbxgdg6@chazelas.org> <CAP+y1xAjAub4cN_N1mgQUp-kZFpCRRRMzj3Ro6g68P9d1NQJTg@mail.gmail.com>
 <CAH+w=7ZB5GPi2VD3BiBDukv6UtK1oevjzdQxgH_eVpUAKWFRgw@mail.gmail.com>
In-Reply-To: <CAH+w=7ZB5GPi2VD3BiBDukv6UtK1oevjzdQxgH_eVpUAKWFRgw@mail.gmail.com>
From: Pier Paolo Grassi <pierpaolog@gmail.com>
Date: Thu, 16 Apr 2020 19:43:53 +0200
Message-ID: <CAP+y1xAGDzkLJLbqavyd8m=qPmaBuuosZXtq12689goscrc_ww@mail.gmail.com>
Subject: Re: indirect assignment to array
To: Bart Schaefer <schaefer@brasslantern.com>
Cc: Zsh-Users List <zsh-users@zsh.org>
Content-Type: multipart/alternative; boundary="000000000000227eff05a36bfcb4"

--000000000000227eff05a36bfcb4
Content-Type: text/plain; charset="UTF-8"

my personal sanitization test is:

[[ ! $var =~ '^[a-zA-Z_][a-zA-Z_0-9]*$' ]] && { error "msg", return 1}

Pier Paolo Grassi
linkedin: https://www.linkedin.com/in/pier-paolo-grassi-19300217
founder: https://www.meetup.com/it-IT/Machine-Learning-TO


Il giorno gio 16 apr 2020 alle ore 19:39 Bart Schaefer <
schaefer@brasslantern.com> ha scritto:

> "Sanitizing" a varname for (P) expansion is context-dependent.  For
> example, this is "legal":
>
> varname='x[$(echo 3)]'
> : ${(AP)varname::=foo}
>
> The point being, there's no straightforward internal test that zsh
> could apply to ${(P)varname} that would correctly reject "unsanitary"
> references.  I suppose we could do something similar to Perl's taint
> checks and prevent (P) from being used on environment variables that
> have not been (re)assigned since the current shell started up.
>

--000000000000227eff05a36bfcb4--