From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <zsh-users-return-21486-mason-zsh=primenet.com.au@zsh.org>
Received: (qmail 5558 invoked by alias); 24 Apr 2016 17:10:34 -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>
X-Seq: 21486
Received: (qmail 4983 invoked from network); 24 Apr 2016 17:10:32 -0000
X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on f.primenet.com.au
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,T_DKIM_INVALID
	autolearn=ham autolearn_force=no version=3.4.1
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=brasslantern-com.20150623.gappssmtp.com; s=20150623;
        h=from:message-id:date:in-reply-to:comments:references:to:subject
         :mime-version;
        bh=OvJw3cAnEuE5uAcOxIUzbdSBZTxikjVr8NOLoBvXBaE=;
        b=NqMZJmNxEZTdgJIn4dmf7tG8+hhPV7NrIKj29RyuWwMBcZCCKJdm6oGdmd9Rg3mJqp
         1LelD0+TU/tHa9zgI7+Du4SB+sfyNmS1JpiDJPRV5gvtsRZPaJptEzPWjaX3JwkY30Rr
         QARL06nCVQY6OVx2c0Hjog/oHE0iprIKXvmsT9ZuTYF/LJxOEUHnVnoEodztlk317n1q
         SgypPLhIqfSXBZ5FyCXNC4z2KME81hRk0aRdI7c9BBfwkqSA2N6icF5bO/IZAHbK7ct9
         nGeEV03enOAHdRGeQO14cSfrR+BHjy52Ch8hzy+3FiO6SNWsKFiz+3bsYfOShZ26TieQ
         cI6Q==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=1e100.net; s=20130820;
        h=x-gm-message-state:from:message-id:date:in-reply-to:comments
         :references:to:subject:mime-version;
        bh=OvJw3cAnEuE5uAcOxIUzbdSBZTxikjVr8NOLoBvXBaE=;
        b=lI+Y/lW4F1Zm5DHlqaoVhInac+5GcQdcA9dFUTklR00iO1/8NYEtGV8gjvDcy4hdsr
         NCb+pN61gWruT+o9NRPhSgO7h1Pb2K4pZCrsUaai+LhOHUIwefVncwr5ELsMBMxk2Mj4
         ziigImf82WPo7H3eLtQdwfuLlFnIpI78h0TRzGuL6DwJbHvH53xzPYa2h7wgYY26b1zL
         /zm8n9SgOIRLQWBz/fbBGETqYq6zjXwGwl3BTFSXuTE2Cf3ZKHKYyXWTuiuDIeYozKsE
         dJnLZrkElufatE1HPKi5Xb9Ofgd2vqBwMu27h269zqQjXzmUz3rTLQH5C3wXCNyVJIzO
         0jCg==
X-Gm-Message-State: AOPr4FXfT778Uiu9dOV9ekReVBzuggY0oZDP7Zv+5z7NMlTzb9kVtfQ1esu3teT9mlak6g==
X-Received: by 10.66.182.161 with SMTP id ef1mr41988929pac.40.1461517831224;
        Sun, 24 Apr 2016 10:10:31 -0700 (PDT)
From: Bart Schaefer <schaefer@brasslantern.com>
Message-Id: <160424101052.ZM3380@torch.brasslantern.com>
Date: Sun, 24 Apr 2016 10:10:52 -0700
In-Reply-To: <20160424112209.GA20670@lilyforest.localdomain>
Comments: In reply to lilydjwg <lilydjwg@gmail.com>
        "Re: I/O edirection and dd" (Apr 24,  7:22pm)
References: <20160424095342.GA11812@solfire> 
	<20160424112209.GA20670@lilyforest.localdomain>
X-Mailer: OpenZMail Classic (0.9.2 24April2005)
To: zsh-users@zsh.org
Subject: Re: I/O edirection and dd
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii

On Apr 24,  7:22pm, lilydjwg wrote:
} Subject: Re: I/O edirection and dd
}
} On Sun, Apr 24, 2016 at 11:53:42AM +0200, Meino.Cramer@gmx.de wrote:
} > 
} >     cat verylongfile | dd count=512 | file -
} 
} Why don't you let file read the file itself? file won't read the entire
} file.

Indeed, if you check /etc/magic or /usr/share/file/magic (location should
be explained in "man file") you'll find that the number of bytes needed
is listed for most file types.  (Encrypted ZIPs may need to read 75kb,
for one example from my system.)

-- 
Barton E. Schaefer