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From: Murk Fletcher <murk.fletcher@gmail.com>
Date: Tue, 7 Jun 2016 14:04:27 +0200
Message-ID: <CAH=3fONuy_afgSHGMO7YafN2cX8O9V9ULV3-+Qq86eRxaJXysw@mail.gmail.com>
Subject: rc scripting trouble with quotes
To: User Questions <freebsd-questions@freebsd.org>
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Hi!

How do I access a variable inside quotes? Right now I'm having some
difficulties:

stop_cmd="cd ${myapp} && \
  ${myapp} stop && \
  kill -9 `cat ${myapp}/tmp/pids/example.pid`"

Returns:

cat: ${myapp}/tmp/pids/example.pid: No such file or directory

I hear it would work better with double quotes, but that would add a
double-double quote at the end:

stop_cmd="cd ${myapp} && \
  ${myapp} stop && \
  kill -9 "$(cat -- ${myapp}/tmp/pids/example.pid)""

Is there a way I could wrap the contents of `stop_cmd` inside a function or
something?

Thanks!

--Murk

https://freebsd.org/doc/en/articles/rc-scripting/rcng-dummy.html