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Sun, 31 Jan 2021 15:12:07 -0400 (AST) Received: from [192.168.0.2] ([24.207.90.194]) by Eastlink with ESMTP id 6I8klAOwQsAqK6I8klUn0u; Sun, 31 Jan 2021 15:12:07 -0400 X-Authority-Analysis: v=2.4 cv=W6f96Tak c=1 sm=1 tr=0 ts=60170107 a=zv49KfEsxEDzuN5AGO7r0Q==:117 a=zv49KfEsxEDzuN5AGO7r0Q==:17 a=IkcTkHD0fZMA:10 a=_-d8x1WAeZo_EcD2Z1oA:9 a=QEXdDO2ut3YA:10 X-Vade-Cause: gggruggvucftvghtrhhoucdtuddrgeduledrfeeigdduudelucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecugfetuffvnffkpffmpdfqfgfvnecuuegrihhlohhuthemuceftddtnecunecujfgurhepuffhvfhfkffffgggjggtgfesthekredttdefjeenucfhrhhomheptfgrhicutehnughrvgifshcuoehrrgihrghnughrvgifshesvggrshhtlhhinhhkrdgtrgeqnecuggftrfgrthhtvghrnhepffdvtdegieevhfekvdefgeeuledvtedvffeiheffhfdtteegudevjeekfffgfffhnecukfhppedvgedrvddtjedrledtrdduleegnecuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehinhgvthepvdegrddvtdejrdeltddrudelgedphhgvlhhopegludelvddrudeikedrtddrvdgnpdhmrghilhhfrhhomheprhgrhigrnhgurhgvfihssegvrghsthhlihhnkhdrtggrpdhrtghpthhtohepiihshhdquhhsvghrshesiihshhdrohhrghdpghgvthdqkghiphfrrghsshifugepthhruhgv X-Vade-Score: 0 X-Vade-State: 0 X-EL-IP-NOAUTH: 24.207.90.194 Subject: Re: detect pipe From: Ray Andrews To: zsh-users@zsh.org References: <1b788ada-9c70-78e5-cc2c-1943000f2994@eastlink.ca> <20210128100858.GA578422@zira.vinc17.org> <20210128102816.GB578422@zira.vinc17.org> <560cef52-aee7-352a-2ba3-25826fe54136@eastlink.ca> <14ce37b2-35ca-6002-474a-7de5d6626a66@eastlink.ca> <05c3d2ba-6a00-9480-e2a8-685432e2442c@eastlink.ca> <84d02db6-8472-7bf8-8893-1638af466c0e@eastlink.ca> Message-id: <67aead03-866a-996a-7a8f-5bda77154655@eastlink.ca> Date: Sun, 31 Jan 2021 11:12:06 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.6.0 MIME-version: 1.0 In-reply-to: <84d02db6-8472-7bf8-8893-1638af466c0e@eastlink.ca> Content-type: text/plain; charset=utf-8; format=flowed Content-transfer-encoding: 8bit Content-language: en-US X-Seq: 26447 Archived-At: X-Loop: zsh-users@zsh.org Errors-To: zsh-users-owner@zsh.org Precedence: list Precedence: bulk Sender: zsh-users-request@zsh.org X-no-archive: yes List-Id: List-Help: List-Subscribe: List-Unsubscribe: List-Post: List-Owner: List-Archive: Archived-At: On 2021-01-30 11:19 a.m., Ray Andrews wrote: > On 2021-01-30 11:00 a.m., Bart Schaefer wrote: >> ubuntu% ls /dev/fd/0 >> /dev/fd/0 >> ubuntu% ls /dev/fd/0 <&- >> ls: cannot access '/dev/fd/0': No such file or directory >> > What would be the practical use of that? Because it keeps 'tabs' from being fed arguments that it doesn't want, and zsh is then smart enough to sent those args on to the next  command :-)