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Sat, 27 Mar 2021 15:34:46 -0400 (EDT) X-Mailer: MessagingEngine.com Webmail Interface User-Agent: Cyrus-JMAP/3.5.0-alpha0-273-g8500d2492d-fm-20210323.002-g8500d249 Mime-Version: 1.0 Message-Id: In-Reply-To: <20210104002213.2703305-2-sandals@crustytoothpaste.net> References: <20210104002213.2703305-1-sandals@crustytoothpaste.net> <20210104002213.2703305-2-sandals@crustytoothpaste.net> Date: Sat, 27 Mar 2021 15:34:26 -0400 From: =?UTF-8?Q?Lawrence_Vel=C3=A1zquez?= To: zsh-workers@zsh.org Cc: "brian m. carlson" Subject: =?UTF-8?Q?Re:_[PATCH_v3_1/1]_exec:_run_final_pipeline_command_in_a_subsh?= =?UTF-8?Q?ell_in_sh_mode?= Content-Type: text/plain X-Seq: 48266 Archived-At: X-Loop: zsh-workers@zsh.org Errors-To: zsh-workers-owner@zsh.org Precedence: list Precedence: bulk Sender: zsh-workers-request@zsh.org X-no-archive: yes List-Id: List-Help: List-Subscribe: List-Unsubscribe: List-Post: List-Owner: List-Archive: Archived-At: On Sun, Jan 3, 2021, at 7:22 PM, brian m. carlson wrote: > zsh typically runs the final command in a pipeline in the main shell > instead of a subshell. However, POSIX specifies that all commands in a > pipeline run in a subshell, but permits zsh's behavior as an extension. > The default /bin/sh implementations on various Linux distros and the > BSDs always use a subshell for all components of a pipeline. > > Since zsh may be used as /bin/sh in some cases (such as macOS Catalina), > it makes sense to have the common sh behavior when emulating sh, so do > that by checking for being the final item of a multi-item pipeline and > creating a subshell in that case. ping for review vq