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1995-08-02
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1KB
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53 lines
#!/bin/sh
#
# memory.sample 1.2 1995/05/30 15:48:37 (David Hinds)
#
# Initialize or shutdown a PCMCIA memory device
#
# The first argument should be either 'start' or 'stop'. The second
# argument is the base name for the device. When starting a device,
# there should be two additional arguments, the major and minor device
# numbers.
#
# This script creates character and block device files for one common
# memory region and one attribute memory region:
#
# /dev/{name}c0c - common memory region 0, character device
# /dev/{name}c0b - common memory region 0, block device
# /dev/{name}a0c - attribute memory region 0, character device
# /dev/{name}a0b - attribute memory region 0, block device
#
# Also, it creates two shorthand links:
#
# /dev/{name}c -> /dev/{name}c0c
# /dev/{name}b -> /dev/{name}c0b
usage()
{
echo "usage: memory [action] [device name] [major] [minor]"
exit 1
}
if [ $# -lt 2 ] ; then usage ; fi
action=$1
name=$2
case "${action:?}" in
'start')
if [ $# -ne 4 ] ; then usage ; fi
major=$3
minor=$4
rm -f /dev/${name}*
mknod /dev/${name}c0c c $major $minor
mknod /dev/${name}c0b b $major $minor
mknod /dev/${name}a0c c $major `expr $minor + 4`
mknod /dev/${name}a0b b $major `expr $minor + 4`
ln -s /dev/${name}c0c /dev/${name}c
ln -s /dev/${name}c0b /dev/${name}b
;;
'stop')
fuser -k /dev/${name}*
rm -f /dev/${name}*
;;
esac