Re: [Buildroot] How to set target system PATH?

[Grant Edwards <grant.b.edwards@gmail.com>]

On 2025-01-23, Arnout Vandecappelle via buildroot <buildroot@buildroot.org> wrote:
>
>
> On 23/01/2025 18:00, Grant Edwards wrote:
>> I've set the desired PATH in the config file:
>> 
>>    BR2_SYSTEM_DEFAULT_PATH="/bin:/sbin:/usr/bin:/usr/sbin:/apps/bin"
>> 
>> But that only seems to affect login shells, and not daemons started
>> from /etc/init.d.
>> 
>> How do I set the _system_ PATH rather than just the login shell PATH.
>
>   Good question! That depends on the init system (because that one is 
> responsible to set the path). I looked in the source, and it looks like both 
> systemd and busybox init hardcode it without any configuration option...
>
>   So unless you convince the maintainers of your favourite init system to 
> change, you won't be able to customize the system path.

Yea, I've been looking at the busybox init docs, and it doesn't look
like there's any way to add/change the environment variables.  It sure
would have been nice if that could be done in /etc/inittab.

I dug through the local archives, and it turns out I addressed this
problem once 13 years ago. I used a postbbuild script and sed commands
to insert a couple lines into etc/init.d/rcS to set/export PATH and
LD_LIBRARY_PATH.

IIRC, I wasn't very happy with that at the time, but I guess I'll have
to do it again.

--
Grant


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