sgil1.initscript

#! /bin/sh

#
# RedHat/Fedora initscript header (chkconfig info)
#
###
# chkconfig: 345 95 05
# description: sets up devices nodes for SGI L1 USB driver
###

#
# SUSE (SLES) initscript header
#
### BEGIN INIT INFO
# Provides:          sgil
# Required-Start:    $syslog $local_fs
# Default-Start:     3 5
# Short-Description: SGI L1 USB driver startup
# Description:       Checks SGI L1 USB device node configuration
#                    and loads the SGI L1 USB driver module.
### END INIT INFO


# Source function library.
if [ -r /etc/rc.d/init.d/functions ]; then
    . /etc/rc.d/init.d/functions
    RH_INIT=y
elif [ -r /etc/rc.status ]; then
    . /etc/rc.status
    rc_reset   # reset the status of this service
    LSB_INIT=y
fi

# skip if this isn't a "start"
[ "$1" = "start" ] || exit 0

# if udev is installed, make sure the rules/permissions files
# for these drivers are present  (we don't use the udev-created devices,
# but having these files in place prevents udev from modifying the
# devices that are created statically)
udevconf=/etc/udev/udev.conf
if [ -f $udevconf ]; then
    udev_permsdir=`grep '^udev_permissions' $udevconf | cut -f2 -d\"`
    if [ -d "$udev_permsdir" ]; then
        udev_sgil1_permsfile="$udev_permsdir/10-sgil1.permissions"
        if [ ! -f "$udev_sgil1_permsfile" ]; then
            echo "Creating $udev_sgil1_permsfile"
            cat > $udev_sgil1_permsfile <<EOF
# 10-sgil1.permissions:  ownership for SGIL1 devices
sgil1_cs:root:root:0444
sgil1_[0-9]*:root:root:0666
sgil1/*:root:root:0666
EOF
        fi
    fi

    udev_rulesdir=`grep '^udev_rules' $udevconf | cut -f2 -d\"`
    if [ -d "$udev_rulesdir" ]; then
        udev_sgil1_rulesfile="$udev_rulesdir/10-sgil1.rules"
        if [ ! -f "$udev_sgil1_rulesfile" ]; then
            echo "Creating $udev_sgil1_rulesfile"
            cat > $udev_sgil1_rulesfile <<EOF
# udev rule to create /dev/sgil1/N for SGIL1 USB devices
# (we don't actually use these devfs-style device names, but doing
#  this prevents devfs from messing with our /dev/sgil1_[0-9]* device names!)
KERNEL="sgil1_[0-9]*", NAME="sgil1/%n"
EOF
        fi
    fi
fi

# determine if this is a 2.4 or 2.6 kernel flavor of the sgil1 driver
KVER=`uname -r | cut -d'.' -f1-2`

# force the SGI L1 driver module to be loaded (if it exists)
#  (otherwise it doesn't get loaded until an L1 is detected, so the
#   L2 emulator will fail if it is started before an L1 is detected)
if [ -f /lib/modules/`uname -r`/kernel/drivers/usb/sgil1.o \
      -o -f /lib/modules/`uname -r`/kernel/drivers/usb/misc/sgil1.ko ]; then
    if [ "$RH_INIT"  = "y" ]; then
        action "Loading SGI L1 USB driver" /sbin/modprobe sgil1
    elif [ "$LSB_INIT" = "y" ]; then
        echo -n "Loading SGI L1 USB driver"
        /sbin/modprobe sgil1
        rc_status -v
    fi
fi

# determine which minor device numbers are being used by the sgil1 module
if [ "$KVER" = "2.4" ]; then
    if [ ! -r /proc/bus/usb/drivers ]; then
        # silently mount the USB device filesystem, in case the kernel wasn't
        # built to mount it automatically
        mount -t usbdevfs usbdevfs /proc/bus/usb >/dev/null 2>/dev/null
    fi
    if [ -r /proc/bus/usb/drivers ]; then
        firstdev=`grep sgil1 /proc/bus/usb/drivers | sort | head --lines=1 | cut -f1 -d-`
        if [ -z "$firstdev" ]; then
            echo "ERROR: sgil1 USB driver is not registered, could not check device nodes."
            exit 0
        fi
    else
        echo "WARNING: could not open /proc/bus/usb/drivers, assuming default sgil1 minor device numbers (208-248)."
        firstdev=208
    fi
    # in the 2.4 kernel, the connection status dev is last L1 USB minor#
    csmajor=180
    csminor=`expr 40 + $firstdev`
else
    # use a fixed range for L1 USB devices in the 2.6 kernel
    firstdev=208
    # connection status device is a misc device in the 2.6 kernel
    csmajor=10
    csminor=249
fi

# basic sanity check; skip install if 41 device nodes are present
#   and the control endpoint is present and the correct major/minor
[ `ls -1 /dev/sgi_* 2>/dev/null | wc -l` -ne 41 ]  ||  ! ls -l /dev/sgil1_cs | grep "$csmajor, $csminor" >/dev/null 2>/dev/null  ||  exit 0

# re-make the necessary SGI USB device nodes
echo -n "Creating SGI L1 USB devices"
rm -f /dev/sgil1_*

make_sgil1_devs()
{
    minor=$1
    num_devs=$2

    i=0
    while [ $i -lt $num_devs ]; do
        mknod /dev/sgil1_$i c 180 `expr $minor + $i`
        i=`expr $i + 1`
    done
}

make_sgil1_devs $firstdev 40
mknod /dev/sgil1_cs c $csmajor $csminor

chmod 666 /dev/sgil1_*
chmod 444 /dev/sgil1_cs

if [ "$RH_INIT" = "y" ]; then
    [ $? -eq 0 ] && success && echo
elif [ "$LSB_INIT" = "y" ]; then
    rc_status -v
    rc_exit
fi