[BusyBox] Busybox init with devfs, shmfs, and pivot_root

[Martin Volf]

On Sun, 12 Jan 2003 08:54:28 +1100
Glenn McGrath <bug1 at optushome.com.au> wrote:

> On Sat, 11 Jan 2003 21:30:39 +0100
> Martin Volf <mv at inv.cz> wrote:
> 
> > I'm using following script, I don't know whether it is 100% correct,
> > it just works for me:
> 
> Does that allow you to succesfully freeramdisk later ?
> 
> What options do you pass to the kernel, are you running it as init or a
> real linuxrc ?
> 
> Im confused about init=/linuxrc, AFAIK the kernel looks for /linuxrc and
> runs it automatically if it finds it. So with init=/linuxrc should
> linuxrc be running twice, once as a proper linuxrc and once as init.

About freeramdisk I know nothing, I don't use it. Also I don't use devfs. The script is /linuxrc (the name is not important) and in lilo.conf I have to have

append  = "init=/linuxrc"

because the linux kernel looks only for init and sh, see linux/init/main.c:

	if (execute_command)
		execve(execute_command,argv_init,envp_init);
	execve("/sbin/init",argv_init,envp_init);
	execve("/etc/init",argv_init,envp_init);
	execve("/bin/init",argv_init,envp_init);
	execve("/bin/sh",argv_init,envp_init);
	panic("No init found.  Try passing init= option to kernel.");

The machine is x86.

-- 
Martin Volf