Messages in this thread Patch in this message | | | From | Pawel Plociennik <> | Subject | Re: [PATCH] chroot= as a new kernel parameter | Date | Wed, 5 Mar 2008 08:38:03 -0500 |
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On Monday 03 March 2008 10:19, Guillaume Chazarain wrote: > > init=/working_distro/lib/ld-linux.so.2 --library-path > /working_distro/lib /working_distro/usr/sbin/chroot /working_distro/ > /sbin/init > root=<root> init=/working_distro/lib/ld-linux.so.2 --library-path /working_distro/lib working_distro/usr/sbin/chroot /working_distro/ /sbin/init
I think that it is *interestly* hack but I am not sure that it will be an usable method for all of a distroes which exists on the world. At last my patch is as simple as possible and it has *only* a *few lines of the code* and it can be used as *independent* method to various *hundred* distroes.
root=<root> chroot=<chroot>
and it looks *beautiful* I think :-)
so I have sent a patch again which it has corrected a *coding style* and a new description in a kernel-parameters.txt file (a suggestions for better description are welcome). I think that this can be a *last version* of a patch. Because I am *newbie* in a kernel hacking I hope that someone will had been written me what now with it ? Maybe send this patch *directly* to *kernel guru* such as Andrew Morton which manages a -mm series ?
diff -urp linux-2.6.24-orig/Documentation/kernel-parameters.txt linux-2.6.24/Documentation/kernel-parameters.txt --- linux-2.6.24-orig/Documentation/kernel-parameters.txt 2008-02-25 20:53:26.000000000 -0500 +++ linux-2.6.24/Documentation/kernel-parameters.txt 2008-03-04 09:51:52.000000000 -0500 @@ -381,6 +381,8 @@ and is between 256 and 4096 characters. Value can be changed at runtime via /selinux/checkreqprot. + chroot= [KNL] change a root for an init process. + clock= [BUGS=X86-32, HW] gettimeofday clocksource override. [Deprecated] Forces specified clocksource (if available) to be used diff -urp linux-2.6.24-orig/init/main.c linux-2.6.24/init/main.c --- linux-2.6.24-orig/init/main.c 2008-03-01 12:58:37.000000000 -0500 +++ linux-2.6.24/init/main.c 2008-03-05 08:23:32.000000000 -0500 @@ -755,8 +755,20 @@ static void __init do_pre_smp_initcalls( spawn_softlockup_task(); } +static void *chroot_str; +static int __init chroot_setup(char *str) +{ + chroot_str = str; + return 1; +} +__setup("chroot=", chroot_setup); + static void run_init_process(char *init_filename) { + if (chroot_str) + if (sys_chroot(chroot_str) < 0) + printk(KERN_WARNING "chroot=%s failed\n", chroot_str); + argv_init[0] = init_filename; kernel_execve(init_filename, argv_init, envp_init); }
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