temperaturerecord.txt

这是《嵌入式linux－硬件、软件与接口》一书对应的所有linux方面实例的源代码

#!/bin/bash
# temperatureRecord v1.0 12/31/01
# www.embeddedlinuxinterfacing.com
#
# The original location of this code is
# http://www.embeddedlinuxinterfacing.com/chapters/12/
#
# Copyright (C) 2001 by Craig Hollabaugh
#
# This program is free software; you can redistribute it and/or modify
# it however you want.
#
# temperatureRecord 
# temperatureRecord is a CGI script. A field target board sends an
# HTTP request with the temperature as a parameter.
# Apache calls this script setting the $QUERY_STRING variable to the
# temperature and $REMOTE_ADDR variable to the sender's IP address.
# This script extracts the last octet of the IP address using it
# as the location number in an INSERT statement.
#
# Here's the header/content blank separation line required by Apache
echo

# Extract the last octet from the sender's IP address, use this
# as for the location number.
location=`echo $REMOTE_ADDR | cut -f 4 -d '.'`

# Get the temperature sent by the target board
temperature=$QUERY_STRING

# Form the INSERT statement and pipe it to mysql.
# You have to login in to mysql as trailblazer with
# password tb because apache will execute this script as 
# user www-data not root.
echo "INSERT INTO temperatures (location,temperature) \
      VALUES ($location,$temperature);" | \
      mysql trailblazer --user=trailblazer --pass=tb