Re: An alternative way of populating /proc

[Jamie Lokier]

Matt Aubury wrote:
> 	create_proc_entries(NULL,
> 		"test:{bar:{x:%d,y:%d,z:%d},foo:%f}",
> 		&x, &y, &z, foo_fun);
> 
> creates a "/proc/test" directory, which further contains a
> subdirectory "bar" and a file "foo". The "bar" subdirectory contains
> three files "x", "y" and "z".

How about this instead:

     "test/{bar/{x:%d,y:%d,z:%d},foo:%f}"

Now you can apply the well known shell brace expansion rules to get:

     "test/bar/x:%d"
     "test/bar/y:%d"
     "test/bar/z:%d"
     "test/foo:%f"

...and now it's consistent with the way devfs entries are created.

(As well as being more flexible).

Though by using a bit of both, you can do another wonderful thing.
Start now with this string:

     "test/{bar:{x:%d,y:%d,z:%d},foo:%f}"

That expands to:

     "test/bar:x:%d"
     "test/bar:y:%d"
     "test/bar:z:%d"
     "test/foo:%f"

Have you yet imagined the warped, but quite well supported by the kernel
thing I'm imagining?  That you may call read() on "test/bar" and it will
dump the contents of x, y and z complete with a standard delimited
format, and atomic snapshot if such a thing is applicable.

have a nice day,
-- Jamie