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Mon, 05 Dec 2022 16:17:33 -0800 (PST) MIME-Version: 1.0 References: <54bcd6dd-e589-4696-f042-1155b78df9d2@eastlink.ca> <819c9630-f315-8b1c-cb52-3d3ae8de2d5c@eastlink.ca> <7eadf163-da34-d90b-61ce-b527fb75b597@eastlink.ca> <37b2456f-0459-4b85-74d1-bb380715e2ed@eastlink.ca> In-Reply-To: <37b2456f-0459-4b85-74d1-bb380715e2ed@eastlink.ca> From: Bart Schaefer Date: Mon, 5 Dec 2022 16:17:22 -0800 Message-ID: Subject: Re: The elements of enlightenment To: Ray Andrews Cc: zsh-users@zsh.org Content-Type: text/plain; charset="UTF-8" X-Seq: 28496 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: On Mon, Dec 5, 2022 at 3:52 PM Ray Andrews wrote: > > probably wouldn't understand the answer anyway but I hafta wonder why > this forking is so necessary. I wrote to you back on October 7: > $(...) spawns a subshell because stdin/stdout text is passed from one > process to another using pipes, and if a process has a pipe to itself > it can deadlock trying to read something it hasn't written yet (or > write something there isn't room for because not enough has been read > yet).