rc.sysinit parameters (Was: Grub boot options - updated kernel hangs)

From: Jason L Tibbitts III (tibbs_at_math.uh.edu)
Date: 05/02/04

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    To: For users of Fedora Core releases <fedora-list@redhat.com>
Date: 01 May 2004 22:53:39 -0500

    Since the various things you can pass to rc.sysinit seem to be lacking
    in documentation, I whipped this up. Is it worth finishing, and if so
    what should I do with it?

    rc.sysinit parameters
    v 0.0 for initscripts 7.50
    Jason Tibbitts, 2004.05.01

    There are various functions of the rc.sysinit script which can be
    controlled by the administrator. Since it is impossible to pass
    information directly to rc.sysinit since the machine hasn't completed
    booting, the script uses four methods to obtain user input:

    *) Checking for a key press

    *) Checking the existence of various files, usually in / (the root
       directory). This means you can create a certain file which will
       control rc.sysinit when the machine next boots. (It is an old
       trick from the days before journaling filesystems to do:
         touch /fastboot;sync;sync;sync;reboot
       in order to skip the often agonizingly long fsck process.
       Superstition demands three calls to sync.)

    *) Checking the contents of various files, most notably
       /etc/sysconfig/init. See
       /usr/share/doc/initscripts-*/sysconfig.txt for descriptions of many
       of these.

    *) Parsing the kernel command line, which is conveniently made
       available to userspace as /proc/cmdline. This makes it possible to
       use the boot loader to pass information to rc.sysinit.

    rc.sysinit parameters (taken from initscripts 7.50 in FC2T3):

    Parameter: CONSOLETYPE
    Set where: /etc/sysconfig/init and automatically determined by a call
               to /sbin/consoletype, I think.
    Values: vt, pty, serial
    Controls whether loadkeys, setsysfont, etc are called.

    Parameter: BOOTUP
    Set where: /etc/sysconfig/init
    See sysconfig.txt. Controls various verbosity and color settings for
    the boot scripts.

    Parameter: GRAPHICAL
    Set where: /etc/sysconfig/init
    See sysconfig.txt? Might not be there.

    Parameter: LOGLEVEL
    Set where: /etc/sysconfig/init, I think.
    Values: ?
    Passed to dmesg -n; sets console log level.

    Parameter: rhgb
    Set where: kernel command line
    Values: none (boolean, either it's there or it isn't)
    Controls the graphical bootup happens. BOOTUP and GRAPHICAL must also
    be set.

    Parameter: CLOCKMODE

    Parameter: CLOCKFLAGS

    Parameter: nousb

    Parameter: nomodules

    Parameter: fastboot
    Set where: existence of /fastboot, kernel command line
    Values: none (boolean, either it's there or it isn't)
    If it's there, fsck will be skipped if possible.

    Parameter: fsckoptions
    Set where: contents of /fsckoptions
    Values: legal options to /sbin/fsck
    Passed verbatim to fsck when checking filesystems.

    Parameter: forcefsck
    Set where: existence of /forcefsck, kernel command line
    Values: none (boolean, either it's there or it isn't)
    Passes '-f' to fsck, forcing a full check.

    Parameter: autofsck
    Set where: existence of /.autofsck
    Values: none (boolean)
    Causes system to complain about unclean shutdown and prompt for a full
    fsck. This file gets removed when the system shuts down and created
    later in startup, so if it exists at boot time then things didn't shut
    down properly.

    Parameter: nopnp

    Parameter: halt
    ?

    Parameter: poweroff
    ?

    Parameter: nofirewire
    Set where: kernel command line
    Values: none (boolean)
    Turns off firewire modules.

    Parameter: ide-scsi
    Set where: kernel command line
    Values: none (boolean)
    Causes ide-cd and ide-scsi modules to be probed.

    Parameter: netprofile
    Set where: kernel command line, like "netprofile=value"
    Values: Any network profile you have set up.
    If set, /usr/sbin/system-config-network-cmd --profile will be called
    with the value you provide.

    Parameter: confirm
    Set where: kernel command line
    Values: none (boolean)
    If present, forces an interactive boot. This does the same thing as
    pressing 'i' when prompted to "Press 'I' to enter interactive
    startup.".

     - J< 

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