example16.16

UNIX[1].shell范例精解(第4版)_code

#! /bin/sh
rm $HOME/df_output $HOME/message 2> /dev/null
uname_out=`uname` 
case "$uname_out" in
	HP-UX)  
		bdf | awk  '{print $5,$6}' | awk -F% '$1>90 {print $0}' \ 
                                         > $HOME/df_output
	;;
	SunOS)
		df -k | awk '{print $5,$6}' | awk -F% '$1>90 {print $0}' \
                                         > $HOME/df_output
	;;
	Linux)
		df | awk '{print $5,$6}' | awk -F% '$1>90 {print $0}' \
                                         > $HOME/df_output
	;;
	Darwin)
		df | awk '{print $5,$6}' | awk -F% '$1>90 {print $0}' \
                                         > $HOME/df_output
	;;
	*)      
	echo "Sorry, $uname_out UNIX not supported by this script"

	;;
esac

if [ -s $HOME/df_output ]
then
echo "** WARNING **" > $HOME/message
echo "The following file systems are filling up." >> $HOME/message
echo "You may want to look into the situation." >> $HOME/message
cat $HOME/df_output >> $HOME/message
cat $HOME/message
echo "This warning message is stored in the file $HOME/message"
echo "You should create a copy of the file now if you would"
echo "like to save this message."
fi
rm $HOME/df_output