#Transform output from 'df -k' into nsca format
#F=filer name, R=return code, W=warn pct, C=crit pct 
BEGIN	{OFS="\t";}
#Get volume name A[3]
	{split($1,A,"/");}
A[2]!="vol" {next;}
A[4]==".snapshot" {next;}
#Compute return code R
	{R=(int($5) > C) ? 2 : ((int($5) > W) ? 1 : 0);}
#Print nsca line
	{print tolower(F),"DISK-" toupper(A[3]),R,$5 " used (" $3 " of " $2 " used)";}