My child was in first grade doing distance learning, during the pandemic, learning to read which made things extra difficult. So to help him I spun up a quick FAMP and took a crash course in M4. I used M4 to generate webpages quickly.
My input looked like this.
MATH(Addition, 1 + 1 = , 2)
MATH(Addition, 1 + 2 = , 3)
MATH(Addition, 2 + 1 = , 3)
Which got inserted into m4 template and output html pages I uploaded to my web server. Fast and easy.
I imagine whatever my setup is after “that-date-which-may-or-may-not-be-here-sometime” setup will require a few configuration scripts for setup, cleanup, services, etc.
To keep my script writing down to a maintainable level, I am dusting off those limited M4 skills and getting setup to automate some script setups. I am envisioning creating regular scripts and rc.d type stuff with some m4 templates. This way, if I need to change from a regular script to a rc.d type I can do so with less effort.
Thoughts, ideas, script ideas/concepts I’ll need? I will take whatever advice/pointers/comments/etc. you may have (I am only in the framework stage of this idea).
rcdscript.sh.m4
define([RCDSCRIPT], [
divert(0)dnl
[name="$1"
start_cmd="${name}_start"
stop_cmd=":"
$1_start()
{
echo "$2"
}]
divert(-1)
])
divert(0)dnl
#!/bin/sh
. /etc/rc.subr
divert(1)dnl
load_rc_config $name
run_rc_command "$1"
divert(-1)
helloworld.mc
RCDSCRIPT(dummy, Hello World!)
Call m4 to make hello world rc.d script.
#!/bin/sh
. /etc/rc.subr
name="dummy"
start_cmd="${name}_start"
stop_cmd=":"
dummy_start()
{
echo "Hello World!"
}
load_rc_config $name
run_rc_command "$1"