From: Matthias Schwarzott <zzam@gentoo.org>
To: linux-hotplug@vger.kernel.org
Subject: Matching something against an environment-variable
Date: Fri, 27 Apr 2007 11:39:04 +0000 [thread overview]
Message-ID: <200704271339.04976.zzam@gentoo.org> (raw)
Hi!
I just have noticed that comparisons like this are not possible with udev:
something=ENV{MY_VAR}
or
something="$env{MY_VAR}"
The reason I want to use that is: creating /dev/root without executing a
program for every blockdev.
With some rule like this:
SUBSYSTEM="block", ATTR{dev}=ENV{ROOT_DEV_NR}, SYMLINK+="root"
with variable ROOT_DEV_NR be either set by
A. SUBSYSTEM="block", IMPORT{file}+="/dev/.udev/root_dev_nr"
and that file is created by udev-startscript
B. injecting the env-var with
udevcontrol env ROOT_DEV_NR=$(get_root_dev)
after udevd has been started
I think the variant something=ENV{MY_VAR} should not be too complicated to
realize.
Matthias
--
Matthias Schwarzott (zzam)
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next reply other threads:[~2007-04-27 11:39 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-27 11:39 Matthias Schwarzott [this message]
2007-04-30 13:43 ` Matching something against an environment-variable Kay Sievers
2007-04-30 14:06 ` Andrey Borzenkov
2007-04-30 14:09 ` Matthias Schwarzott
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