Date: Tue, 19 Sep 2006 12:55:28 +0200 (CEST) From: Oliver Fromme <olli@lurza.secnetix.de> To: freebsd-net@FreeBSD.ORG, sivakumar.subramani@wipro.com Subject: Re: How to access the values of the kenv variables in driver code? Message-ID: <200609191055.k8JAtSeJ067912@lurza.secnetix.de> In-Reply-To: <956E7FA2615F3B4595FC5F22870A72210817F1@blr-m3-msg.wipro.com>
next in thread | previous in thread | raw e-mail | index | archive | help
sivakumar.subramani@wipro.com wrote: > I would like to have some of the configuration parameters of my driver > to be present as part of the /boot/device.hints file. After adding a > variable I could see that variable and it's value as part of kevn's > ouput. > > Can any one please let me know how to access the value of these > variables in my drive code? >From sys/kern/kern_environment.c: /* * The unified bootloader passes us a pointer to a preserved copy of * bootstrap/kernel environment variables. We convert them to a * dynamic array of strings later when the VM subsystem is up. * * We make these available through the kenv(2) syscall for userland * and through getenv()/freeenv() setenv() unsetenv() testenv() for * the kernel. */ The following shell command will give you lots of examples: find /usr/src/sys -name "*.c" | xargs grep -w getenv Best regards Oliver -- Oliver Fromme, secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing Dienstleistungen mit Schwerpunkt FreeBSD: http://www.secnetix.de/bsd Any opinions expressed in this message may be personal to the author and may not necessarily reflect the opinions of secnetix in any way. C++: "an octopus made by nailing extra legs onto a dog" -- Steve Taylor, 1998
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200609191055.k8JAtSeJ067912>