[PATCH] - allow specification of alternate inittab files

[Denis Vlasenko]

On Tuesday 31 October 2006 23:22, B Thomas wrote:
> Hi,
> 
> There are circumstances in which it would be great to allow the selection of
> different inittab file at boot time. This patch adds the ability to select
> the inittab file via a command line option (bb_inittab).
> 
> One of the things that I don't like about this patch is the need to mount
> /proc on systems in which it isn't mounted.  The mount is cleaned up and
> handled carefully; I just don't like having to do it.  Having said that,
> this patch has proven to be quite useful.
> 
> Signed-off-by: Ben Thomas (ben at virtualiron.com)

I thought that all unrecognized kernel params are passed in the environment
to init: kernel tree, init/main.c:

/*
 * Unknown boot options get handed to init, unless they look like
 * failed parameters
 */
static int __init unknown_bootoption(char *param, char *val)
{
....
        if (val) {
                /* Environment option */
                unsigned int i;
                for (i = 0; envp_init[i]; i++) {
                        if (i == MAX_INIT_ENVS) {
                                panic_later = "Too many boot env vars at `%s'";
                                panic_param = param;
                        }
                        if (!strncmp(param, envp_init[i], val - param))
                                break;
                }
....

So you do not need to parse /proc/commandline
--
vda