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Sat, 8 Apr 2023 00:03:32 -0400 (EDT) X-Mailer: MessagingEngine.com Webmail Interface User-Agent: Cyrus-JMAP/3.9.0-alpha0-334-g8c072af647-fm-20230330.001-g8c072af6 Mime-Version: 1.0 Message-Id: <2e5f16a4-ba7c-4992-9d25-80214bd5d025@app.fastmail.com> In-Reply-To: <739C36BD-E3A5-40A4-B661-2AC54D32C2C1@kba.biglobe.ne.jp> References: <2A0716F2-F80B-4357-87AA-0A9881A52CEC@kba.biglobe.ne.jp> <838816ad-0337-452b-94d1-e18a17c33c78@app.fastmail.com> <739C36BD-E3A5-40A4-B661-2AC54D32C2C1@kba.biglobe.ne.jp> Date: Fri, 07 Apr 2023 23:03:12 -0500 From: dana To: "Jun T" Cc: zsh-workers@zsh.org Subject: Re: ksh compatibility: initial value of $_ Content-Type: text/plain X-Seq: 51633 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: On Wed 5 Apr 2023, at 13:16, Jun. T wrote: > If we add, say ZSH_EXEPATH, then I think just copying _ from envionment is > enough. I don't know if/how people are using $_ within the shell, i don't really use it myself, but if you've got the code in there to make it match ksh/bash anyway, what's the reason not to do so? Aside from being worried about wasting I/O on it like i was... but i'm not sure that was a valid concern On Wed 5 Apr 2023, at 13:16, Jun. T wrote: > If this is OK, and if ZSH_EXEPATH (or any other name?) would be usefull, I would personally like to see something like that go in, with or without a similar change to $_, if it doesn't bother anyone. I've needed the shell's path a few times in the past, and although it's simple enough to use procfs where available, i think you have to resort to parsing lsof or whatever to do it on macOS As for the name, here's what the equivalent feature is called in other interpreters: - bash: $BASH - Node: process.execPath - Perl: $^X - PHP: PHP_BINARY - Python: sys.executable - Raku (Perl 6): $*EXECUTABLE - TCL: [info nameofexecutable] Maybe ZSH_EXECUTABLE? That kind of matches ZSH_SCRIPT too dana