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View File Name : hotplug.functions

# Setup and shell utility functions for use in hotplug agents.
# vim: syntax=sh
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation version 2 of the License.

if [ "$UDEV_LOG" ] && [ "$UDEV_LOG" -ge 7 ]; then
	DEBUG=yes
fi

PATH='/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin'

[ -e /etc/default/hotplug ] && . /etc/default/hotplug


if [ -x /usr/bin/logger ]; then
	LOGGER=/usr/bin/logger
elif [ -x /bin/logger ]; then
	LOGGER=/bin/logger
else
	unset LOGGER
fi

# for diagnostics
if [ -t 1 -a -z "$LOGGER" ] || [ ! -e '/dev/log' ]; then
	mesg() {
		echo "$@" >&2
	}
elif [ -t 1 ]; then
	mesg() {
		echo "$@"
		$LOGGER -t "${0##*/}[$$]" "$@"
	}
else
	mesg() {
		$LOGGER -t "${0##*/}[$$]" "$@"
	}
fi

debug_mesg() {
	[ -z "$DEBUG" -o "$DEBUG" = no ] && return 0
	mesg "$@"
}

wait_for_file() {
	local file=$1
	local timeout=$2
	[ "$timeout" ] || timeout=120

	local count=$timeout
	while [ $count != 0 ]; do
		[ -e "$file" ] && return 0
		sleep 1
		count=$(($count - 1))
	done

	mesg "$file did not appear before the timeout!"
	exit 1
}