https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=236949
Bug ID: 236949
Summary: Attempt to provide a boot profile manager
Product: Base System
Version: CURRENT
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: misc
Assignee: b...@freebsd.org
Reporter: phascolarc...@protonmail.ch
Created attachment 203310
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=203310&action=edit
boot profile manager rc script
At the moment, as far as I know, it is not possible in FreeBSD to have
different profiles to select services at startup. For example, I can not decide
at boot time to start netif on my laptop if and only if I have access to a
connection: my choices are to always start it at boot or to always start it by
hand after boot.
My rc script aims to give users choice at boot time.
The service is called "boot_profile_manager" and is of course activated by
setting boot_profile_manager="YES" into rc.conf (but do not use rc.conf.d: see
later).
The script should be the first service started on the system: I tried to define
this condition by setting "BEFORE: systcl". At boot time it will print a
numbered list of profiles given by the variable $boot_profile_manager_profiles
that must be defined in rc.conf -- e.g, if boot_profile_manager="default
no_network testing", the menu will be:
1. default
2. no_network
3. testing
To each profile must correpond a directory into
/usr/local/etc/boot_profile_manager. Thus in the example we will have the
directories /usr/local/etc/boot_profile_manager/default,
/usr/local/etc/boot_profile_manager/no_network and
/usr/local/etc/boot_profile_manager/testing.
When user selects a profile, /etc/rc.conf.d becomes a symlink to the directory
of the selected profile. Thus if user selects profile 2 of our example, then
/etc/rc.conf.d will be a symlink to
/usr/local/etc/boot_profile_manager/no_network.
(To be able to make the symlink, / is temporarly mounted rw and then restored
read-only.)
A timeout is set by default to 5 seconds in case user does not select any
profile and can be set to any value through "boot_profile_manager_timeout"
variable: after the timeout, profile 1 is selected by default.
That way users can put in /etc/rc.conf any configuration common to all profiles
(e.g. hostname) and use directories into /usr/local/etc/boot_profile_manager as
choices for /etc/rc.conf.d.
I have tested successfully my script in a virtual machine running 13.0-CURRENT
r345444 through bhyve and in my own system running 12.0-STABLE r345758.
I think it would be nice to include this service into base system, but feel
free to ask me to make a port of it if it would be preferable.
Of course, I will be glad to make any modification required to meet standards,
improve quality etc. and I will write a manpage once the final version will be
ready.
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