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Mon, 23 May 2022 10:01:51 -0700 (PDT) MIME-Version: 1.0 Received: by 2002:a05:6a10:e897:0:0:0:0 with HTTP; Mon, 23 May 2022 10:01:50 -0700 (PDT) In-Reply-To: References: From: Mikael Magnusson Date: Mon, 23 May 2022 19:01:50 +0200 Message-ID: Subject: Re: inconsistency between bash and zsh subshells To: Matt Zagrabelny Cc: zsh-users@zsh.org Content-Type: text/plain; charset="UTF-8" X-Seq: 27791 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 5/23/22, Matt Zagrabelny wrote: > Greetings zsh-users, > > I'm using zsh 5.8.1 (Debian). > > I am seeing inconsistent behavior between using a subshell in the branch of > a conditional in bash and zsh. > > zsh: > > zsh$ rm -f /tmp/FOO > zsh$ ls /tmp/FOO 2> /dev/null || echo "no /tmp/FOO" > no /tmp/FOO > zsh$ echo | while read LINE; do IP=$(echo $LINE | cut -d ' ' -f 1); if [ -n > "$IP" ]; then echo FOO; FOO=$(touch /tmp/FOO); else echo BAR; fi; done; ls > /tmp/FOO 2> /dev/null || echo "no /tmp/FOO" > BAR > /tmp/FOO > > Why does the subshell in zsh get executed even though the conditional > branch is not? That is, the "touch"-ing of /tmp/FOO. You're most likely using a poorly written prompt theme and/or thing that updates your terminal title. Try disabling that code and try again if so. -- Mikael Magnusson