Re: [PATCH] Give a hint when 'udevd' is ready to operate

[Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>]

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Kay Sievers <kay.sievers@vrfy.org> writes:

>> 	udevd --daemon
>> 	udevtrigger
>
> Yeah, that is the usual way and udevd makes sure not to return before
> it's fully initialized. Waiting for a file from a daemon, just because
> the minit-like stuff tries to be smart (daemons don't detach) sounds
> weird. Anyway, the current udevd exports the seqnum of the kernel, so
> one can wait for that,

Does not work; the first call to export_initial_seqnum() (before fork())
is a noop because

|        strlcpy(filename, udev_root, sizeof(filename));
|        strlcat(filename, "/" EVENT_SEQNUM, sizeof(filename));
|        fd = open(filename, O_WRONLY|O_TRUNC|O_CREAT, 0644);

fails due to the non-existing '/dev/.udev' path. So, my patch should be
applied earlier


|         udev_rules_init(&rules, 1);
|
| +       create_path(udev_root);
|         export_initial_seqnum();
|
|         if (daemonize) {



Enrico

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