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=MAILING_LIST_MULTI, RCVD_IN_DNSWL_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.2 Received: (qmail 14958 invoked from network); 16 Apr 2020 17:38:53 -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= Received: from ns1.primenet.com.au (HELO primenet.com.au) (203.24.36.2) by inbox.vuxu.org with UTF8ESMTPZ; 16 Apr 2020 17:38:53 -0000 Received: (qmail 11187 invoked by alias); 16 Apr 2020 17:38:43 -0000 Mailing-List: contact zsh-users-help@zsh.org; run by ezmlm Precedence: bulk X-No-Archive: yes List-Id: Zsh Users List List-Post: List-Help: List-Unsubscribe: X-Seq: 24783 Received: (qmail 10635 invoked by uid 1010); 16 Apr 2020 17:38:43 -0000 X-Qmail-Scanner-Diagnostics: from mail-ot1-f47.google.com by f.primenet.com.au (envelope-from , uid 7791) with qmail-scanner-2.11 (clamdscan: 0.102.2/25779. spamassassin: 3.4.4. Clear:RC:0(209.85.210.47):SA:0(-1.9/5.0):. Processed in 2.070019 secs); 16 Apr 2020 17:38:43 -0000 X-Envelope-From: schaefer@brasslantern.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 209.85.210.47 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; bh=VWtANqwHU9P2w0H90EJ5a6N+ZSa+H3EQwvP4K/s+fgI=; b=jcW6mnbkeD+V24mJ+B0Vg0kecR1XofO8q+SLq6Fq6d+T/GjpOLL9T+YMahg9Br/SMo cUBol1OXsT83LuKUA49oQekcW0eSFnaEfCKH/WISn9rKK9LhPfmpXB/Do6XG3CHv54ou yCdETosfrO+jwYzeK7/mPmKVwD4SdTX81nBwv6ZNkJ8tpFqToHDt5b4hrImIbWwqCaj7 6BSfWdHWlIvbUDweAwNACQVFj3v4t2w2vqBJltO8B8S6EkbwUNwurLzC+a5b0NSQAQFu v8J+1tKV5/Bfyo5wfInbdk9gaBkrQFMBnNQApUJa41JgWcyqhNIkh7zU6q6tDIx9Pt8L ge3Q== X-Gm-Message-State: AGi0PuZi1uA/d45Tc26MmSlmg+lb3wSJ/vHjF75C20W3Xx7MSCLXDIQL t2GrpD96le4Qwroa1TPKOn1ghuDAPYeNs2BwvHh3XAGr6Qw= X-Google-Smtp-Source: APiQypLqpQM/HQmABVI4p27ptq2qewjUEmgCiZD3izN+9uzAptLxxdlYY8pqhN9uq3pIc3HNhM5f3xf6MchM8AOw+KI= X-Received: by 2002:a9d:d0f:: with SMTP id 15mr28466540oti.161.1587058686730; Thu, 16 Apr 2020 10:38:06 -0700 (PDT) MIME-Version: 1.0 References: <20200416163022.vremvngrnnbxgdg6@chazelas.org> In-Reply-To: From: Bart Schaefer Date: Thu, 16 Apr 2020 10:37:55 -0700 Message-ID: Subject: Re: indirect assignment to array To: Zsh-Users List Content-Type: text/plain; charset="UTF-8" "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.