[Linux-Anyway] Re: Painfully slooooooooow
- From: Meph Istopheles <meph@xxxxxxxxxxx>
- To: Linux-Anyway@xxxxxxxxxxxxx
- Date: Fri, 28 May 2004 15:15:15 -0700 (PDT)
> All you need to do now is set it up so that UDMA gets activated
> at boot time.
> ISTR you saying you'd gone back to slack, in which case you
> want to append the commands you used to your /etc/rc.d/rc.S
> file.
Yes, slack 9.1. While rc.S certainly looks as if it would be
the file for this -- based on the things I see it doing -- I've
no idea where I'd put the command.
I know it's a bit long, but here it is. Know where I'd add
that?
#!/bin/sh
#
# /etc/rc.d/rc.S: System initialization script.
#
# Mostly written by: Patrick J. Volkerding, <volkerdi@xxxxxxxxxxxxx>
#
PATH=/sbin:/usr/sbin:/bin:/usr/bin
# Start devfsd if necessary
if [ -r /dev/.devfsd ]; then
if [ -x /sbin/devfsd ]; then
echo "Starting devfs daemon: /sbin/devfsd /dev"
/sbin/devfsd /dev
fi
fi
# enable swapping
/sbin/swapon -a
# Test to see if the root partition is read-only, like it ought to be.
READWRITE=no
if echo -n >> "Testing filesystem status"; then
rm -f "Testing filesystem status"
READWRITE=yes
fi
# See if a forced filesystem check was requested at shutdown:
if [ -r /etc/forcefsck ]; then
FORCEFSCK="-f"
fi
# Check the root filesystem:
if [ ! $READWRITE = yes ]; then
RETVAL=0
if [ ! -r /etc/fastboot ]; then
echo "Checking root filesystem:"
/sbin/fsck $FORCEFSCK -C -a /
RETVAL=$?
fi
# An error code of 2 or higher will require a reboot.
if [ $RETVAL -ge 2 ]; then
# An error code equal to or greater than 4 means that some errors
# could not be corrected. This requires manual attention, so we
# offer a chance to try to fix the problem in single-user mode:
if [ $RETVAL -ge 4 ]; then
echo
echo
echo "***********************************************************"
echo "*** An error occurred during the root filesystem check. ***"
echo "*** You will now be given a chance to log into the ***"
echo "*** system in single-user mode to fix the problem. ***"
echo "*** ***"
echo "*** If you are using the ext2 filesystem, running ***"
echo "*** 'e2fsck -v -y <partition>' might help. ***"
echo "***********************************************************"
echo
echo "Once you exit the single-user shell, the system will reboot."
echo
PS1="(Repair filesystem) \#"; export PS1
sulogin
else # With an error code of 2 or 3, reboot the machine automatically:
echo
echo
echo "***********************************"
echo "*** The filesystem was changed. ***"
echo "*** The system will now reboot. ***"
echo "***********************************"
echo
fi
echo "Unmounting file systems."
umount -a -r
mount -n -o remount,ro /
echo "Rebooting system."
sleep 2
reboot -f
fi
# Remount the root filesystem in read-write mode
echo "Remounting root device with read-write enabled."
/sbin/mount -w -v -n -o remount /
if [ $? -gt 0 ] ; then
echo
echo "Attempt to remount root device as read-write failed! This is going
to"
echo "cause serious problems."
echo
echo "If you're using the UMSDOS filesystem, you **MUST** mount the root
partition"
echo "read-write! You can make sure the root filesystem is getting mounted
"
echo "read-write with the 'rw' flag to Loadlin:"
echo
echo "loadlin vmlinuz root=/dev/hda1 rw (replace /dev/hda1 with your root
device)"
echo
echo "Normal bootdisks can be made to mount a system read-write with the
rdev command:"
echo
echo "rdev -R /dev/fd0 0"
echo
echo "You can also get into your system by using a boot disk with a command
like this"
echo "on the LILO prompt line: (change the root partition name as needed)"
echo
echo "LILO: mount root=/dev/hda1 rw"
echo
echo "Please press ENTER to continue, then reboot and use one of the above
methods to"
echo -n "get into your machine and start looking for the problem. "
read junk;
fi
else
echo "Testing filesystem status: read-write filesystem"
if cat /etc/fstab | grep ' / ' | grep umsdos 1> /dev/null 2> /dev/null ; then
ROOTTYPE="umsdos"
fi
if [ ! "$ROOTTYPE" = "umsdos" ]; then # no warn for UMSDOS
echo
echo "*** ERROR: Root partition has already been mounted read-write. Cannot
check!"
echo
echo "For filesystem checking to work properly, your system must initially
mount"
echo "the root partition as read only. Please modify your kernel with
'rdev' so that"
echo "it does this. If you're booting with LILO, add a line:"
echo
echo " read-only"
echo
echo "to the Linux section in your /etc/lilo.conf and type 'lilo' to
reinstall it."
echo
echo "If you boot from a kernel on a floppy disk, put it in the drive and
type:"
echo " rdev -R /dev/fd0 1"
echo
echo "If you boot from a bootdisk, or with Loadlin, you can add the 'ro'
flag."
echo
echo "This will fix the problem *AND* eliminate this annoying message. :^)"
echo
echo -n "Press ENTER to continue. "
read junk;
fi
fi # Done checking root filesystem
# Any /etc/mtab that exists here is old, so we delete it to start over:
/bin/rm -f /etc/mtab*
# Remounting the / partition will initialize the new /etc/mtab:
/sbin/mount -w -o remount /
# Initialize the Logical Volume Manager.
# This won't start unless /etc/lvmtab is found, which is created by
/sbin/vgscan.
# Therefore, to use LVM you must run /sbin/vgscan yourself the first time.
if [ -r /etc/lvmtab ]; then
# Mount /proc early (it's needed for vgscan):
/sbin/mount -a -t proc
# Scan for new volume groups:
/sbin/vgscan
if [ $? = 0 ]; then
# Make volume groups available to the kernel:
/sbin/vgchange -ay
fi
fi
# Check all the non-root filesystems:
if [ ! -r /etc/fastboot ]; then
echo "Checking non-root filesystems:"
/sbin/fsck $FORCEFSCK -C -R -A -a
fi
# mount non-root file systems in fstab (but not NFS or SMB
# because TCP/IP is not yet configured):
/sbin/mount -a -v -t nonfs,nosmbfs
# Clean up some temporary files:
( cd /var/log/setup/tmp && rm -rf * )
/bin/rm -f /var/run/utmp /var/run/*pid /etc/nologin /var/run/lpd* \
/var/run/ppp* /etc/dhcpc/dhcpcd-eth0.pid /etc/forcefsck /etc/fastboot
# Create a fresh utmp file:
touch /var/run/utmp
chown root.utmp /var/run/utmp
chmod 664 /var/run/utmp
if [ "$ROOTTYPE" = "umsdos" ]; then # we need to update any files added in DOS:
echo "Synchronizing UMSDOS directory structure:"
echo " /sbin/umssync -r99 -v- /"
/sbin/umssync -r99 -v- /
fi
# Setup the /etc/motd to reflect the current kernel level:
# THIS WIPES ANY CHANGES YOU MAKE TO /ETC/MOTD WITH EACH BOOT.
# COMMENT THIS OUT IF YOU WANT TO MAKE A CUSTOM VERSION.
echo "`/bin/uname -sr`." > /etc/motd
# Configure ISA Plug-and-Play devices:
if [ -r /etc/isapnp.conf ]; then
if [ -x /sbin/isapnp ]; then
/sbin/isapnp /etc/isapnp.conf
fi
fi
# Set the system time from the hardware clock using hwclock --hctosys.
# Detect SGI Visual Workstation, since hwclock will make those freeze up:
if fgrep -l Cobalt-APIC /proc/interrupts 1> /dev/null 2> /dev/null ; then
echo "SGI Visual Workstation detected. Not running hwclock."
elif [ -x /sbin/hwclock ]; then
if grep "^UTC" /etc/hardwareclock 1> /dev/null 2> /dev/null ; then
echo "Setting system time from the hardware clock (UTC)."
/sbin/hwclock --utc --hctosys
else
echo "Setting system time from the hardware clock (localtime)."
/sbin/hwclock --localtime --hctosys
fi
fi
# If 'nohotplug' was given at boot, or rc.hotplug has been turned off
# (is not executable), then shut off hotplugging in the kernel now.
if [ -w /proc/sys/kernel/hotplug ]; then
if grep nohotplug /proc/cmdline 1> /dev/null 2> /dev/null ; then
echo "/dev/null" > /proc/sys/kernel/hotplug
elif [ ! -x /etc/rc.d/rc.hotplug ]; then
echo "/dev/null" > /proc/sys/kernel/hotplug
fi
fi
# This loads any kernel modules that are needed. These might be required to
# use your ethernet card, sound card, or other optional hardware.
if [ -x /etc/rc.d/rc.modules -a -r /proc/modules ]; then
. /etc/rc.d/rc.modules
fi
# Run serial port setup script:
# (CAREFUL! This can make some systems hang if the rc.serial script isn't
# set up correctly. If this happens, you may have to edit the file from a
# boot disk)
#
# . /etc/rc.d/rc.serial
# Carry an entropy pool between reboots to improve randomness.
# Load and then save 512 bytes, which is the size of the entropy pool.
if [ -f /etc/random-seed ]; then
echo "Using /etc/random-seed to initialize /dev/urandom."
cat /etc/random-seed >/dev/urandom
fi
dd if=/dev/urandom of=/etc/random-seed count=1 bs=512 2> /dev/null
--
Everyone is a genius. It's just that some people are too
stupid to realize it.
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