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bug#23576: [documentation] ‘Using Emacs as a Server’: ‘M-x set-variable

From: Dmitry Alexandrov
Subject: bug#23576: [documentation] ‘Using Emacs as a Server’: ‘M-x set-variable RET server-name RET foo RET’
Date: Wed, 18 May 2016 22:25:38 +0300
User-agent: Mozilla/5.0 (X11; GNU x86_64; rv:31.0) Gecko/20100101 Icedove/31.3.0

Chapter 38 ‘Using Emacs as a Server’ in ‘GNU Emacs Manual’ says [0] the following:

    You can run multiple Emacs servers on the same machine by giving
    each one a unique “server name”, using the variable server-name. For
    example, M-x set-variable RET server-name RET foo RET sets the
    server name to ‘foo’.

[0] https://www.gnu.org/software/emacs/manual/html_node/emacs/Emacs-Server.html

First of all, ‘M-x set-variable RET server-name RET foo RET’ just does not work, returning “Value ‘foo’ does not match type string of server-name”. It actually should be ‘M-x set-variable RET server-name RET "foo" RET’, since ‘server-name’ requires a string.

However, I found this example pretty confusing in general: when the server is not started yet, setting ‘server-name’ with ‘M-x set-variable’ is impossible (variable does not exist yet); when the server is already running, there is no much sense in setting it, since it does not rename the instance on-the-fly.

¿Would not it be more useful to give as an example of how to start multiple Emacs servers something like:

$ emacs --eval '(setq server-name "foo")' --daemon

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