#!/bin/sh
#
# /etc/rc.d/rc.S:  System initialization script.
#
# Mostly written by:  Patrick J. Volkerding, <volkerdi@slackware.com>
#

PATH=/sbin:/usr/sbin:/bin:/usr/bin

# Mount /proc right away:
/sbin/mount -v proc /proc -n -t proc

# Mount sysfs next, if the kernel supports it:
if [ -d /sys ]; then
  if grep -wq sysfs /proc/filesystems ; then
    if ! grep -wq sysfs /proc/mounts ; then
      /sbin/mount -v sysfs /sys -n -t sysfs
    fi
  fi
fi

# Enable swapping:
/sbin/swapon -a

# Set the system time from the hardware clock using hwclock --hctosys.
if [ -x /sbin/hwclock ]; then
  # Check for a broken motherboard RTC clock (where ioports for rtc are
  # unknown) to prevent hwclock causing a hang:
  if ! grep -q -w rtc /proc/ioports ; then
    CLOCK_OPT="--directisa"
  fi
  if grep -wq "^UTC" /etc/hardwareclock ; then
    echo "Setting system time from the hardware clock (UTC)."
    /sbin/hwclock $CLOCK_OPT --utc --hctosys
  else
    echo "Setting system time from the hardware clock (localtime)."
    /sbin/hwclock $CLOCK_OPT --localtime --hctosys
  fi
fi

# Read in the correct / filesystem complete with arguments so mount will
# show them correctly. This does not stop those arguments from functioning
# but does prevent a small bug with /etc/mtab.
/bin/grep ' / ' /proc/mounts | grep -v "^rootfs" > /etc/mtab

# Fix /etc/mtab to list sys and proc if they were not yet entered in
# /etc/mtab because / was still mounted read-only:
if [ -d /proc/sys ]; then
  /sbin/mount -f proc /proc -t proc
fi
if [ -d /sys/bus ]; then
  /sbin/mount -f sysfs /sys -t sysfs
fi

# Configure ISA Plug-and-Play devices:
if [ -r /etc/isapnp.conf ]; then
  if [ -x /sbin/isapnp ]; then
    /sbin/isapnp /etc/isapnp.conf
  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.
# Priority is given first to a script named "rc.modules.local", then
# to "rc.modules-$FULL_KERNEL_VERSION", and finally to the plain "rc.modules".
# Note that if /etc/rc.d/rc.modules.local is found, then that will be the ONLY
# rc.modules script the machine will run, so make sure it has everything in
# it that you need.
if [ -x /etc/rc.d/rc.modules.local -a -r /proc/modules ]; then
  echo "Running /etc/rc.d/rc.modules.local:"
  /bin/sh /etc/rc.d/rc.modules.local
elif [ -x /etc/rc.d/rc.modules-$(uname -r) -a -r /proc/modules ]; then
  echo "Running /etc/rc.d/rc.modules-$(uname -r):"
  . /etc/rc.d/rc.modules-$(uname -r)
elif [ -x /etc/rc.d/rc.modules -a -r /proc/modules -a -L /etc/rc.d/rc.modules ]; then
  echo "Running /etc/rc.d/rc.modules -> $(readlink /etc/rc.d/rc.modules):"
  . /etc/rc.d/rc.modules
elif [ -x /etc/rc.d/rc.modules -a -r /proc/modules ]; then
  echo "Running /etc/rc.d/rc.modules:"
  . /etc/rc.d/rc.modules
fi

# Configure runtime kernel parameters:
if [ -x /sbin/sysctl -a -r /etc/sysctl.conf ]; then
  /sbin/sysctl -e -p /etc/sysctl.conf
fi

# Enable swapping again.  This is needed in case a swapfile is used,
# as it can't be enabled until the filesystem it resides on has been
# mounted read-write.
/sbin/swapon -a

# Clean up some temporary files:
rm -f /var/run/* /var/run/*/* /var/run/*/*/* /etc/nologin \
  /etc/dhcpc/*.pid /etc/forcefsck /etc/fastboot \
  /var/state/saslauthd/saslauthd.pid \
  /tmp/.Xauth* 1> /dev/null 2> /dev/null
  ( cd /var/log/setup/tmp && rm -rf * )
  ( cd /tmp && rm -rf kde-[a-zA-Z]* ksocket-[a-zA-Z]* hsperfdata_[a-zA-Z]* plugtmp* )

# Create /tmp/{.ICE-unix,.X11-unix} if they are not present:
if [ ! -e /tmp/.ICE-unix ]; then
  mkdir -p /tmp/.ICE-unix
  chmod 1777 /tmp/.ICE-unix
fi
if [ ! -e /tmp/.X11-unix ]; then
  mkdir -p /tmp/.X11-unix
  chmod 1777 /tmp/.X11-unix
fi

# Create a fresh utmp file:
touch /var/run/utmp
chown root:utmp /var/run/utmp
chmod 664 /var/run/utmp

# Update the current kernel level in the /etc/motd (Message Of The Day) file,
# if the first line of that file begins with the word 'Linux'.
# You are free to modify the rest of the file as you see fit.
if [ -x /bin/sed ]; then
  /bin/sed -i "{1s/^Linux.*/$(/bin/uname -sr)\./}" /etc/motd
fi

# If there are SystemV init scripts for this runlevel, run them.
if [ -x /etc/rc.d/rc.sysvinit ]; then
  . /etc/rc.d/rc.sysvinit
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, and/or set it as non-executable:
if [ -x /etc/rc.d/rc.serial ]; then
  sh /etc/rc.d/rc.serial start
fi

# Carry an entropy pool between reboots to improve randomness.
if [ -f /etc/random-seed ]; then
  echo "Using /etc/random-seed to initialize /dev/urandom."
  cat /etc/random-seed > /dev/urandom
fi
# Use the pool size from /proc, or 512 bytes:
if [ -r /proc/sys/kernel/random/poolsize ]; then
  dd if=/dev/urandom of=/etc/random-seed count=1 bs=$(cat /proc/sys/kernel/random/poolsize) 2> /dev/null
else
  dd if=/dev/urandom of=/etc/random-seed count=1 bs=512 2> /dev/null
fi
chmod 600 /etc/random-seed

