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#! /bin/sh
# Startup script to create the device-mapper control device
# on non-devfs systems.
# Non-zero exit status indicates failure.
# These must correspond to the definitions in device-mapper.h and dm.h
DM_DIR="mapper"
DM_NAME="device-mapper"
set -e
DIR="/dev/$DM_DIR"
CONTROL="$DIR/control"
# Check for devfs, procfs
if test -e /dev/.devfsd ; then
echo "devfs detected: devmap_mknod.sh script not required."
exit
fi
if test ! -e /proc/devices ; then
echo "procfs not found: please create $CONTROL manually."
exit 1
fi
# Get major, minor, and mknod
MAJOR=$(sed -n 's/^ *\([0-9]\+\) \+misc$/\1/p' /proc/devices)
MINOR=$(sed -n "s/^ *\([0-9]\+\) \+$DM_NAME\$/\1/p" /proc/misc)
if test -z "$MAJOR" || test -z "$MINOR" ; then
echo "$DM_NAME kernel module not loaded: can't create $CONTROL."
exit 1
fi
mkdir -p --mode=755 $DIR
test -e $CONTROL && rm -f $CONTROL
echo "Creating $CONTROL character device with major:$MAJOR minor:$MINOR."
mknod --mode=600 $CONTROL c $MAJOR $MINOR
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