awk '# lookup -- reads local glossary file and prompts user for query
#0
BEGIN { FS = "\t"; OFS = "\t"
# prompt user
printf("Enter a glossary term: ")
}
#1 read local file named glossary
FILENAME == "glossary" {
# load each glossary entry into an array
entry[$1] = $2
next
}
#2 scan for command to exit program
$0 ~ /^(quit|[qQ]|exit|[Xx])$/ { exit }
#3 process any non-empty line
$0 != "" {
if ( $0 in entry ) {
# it is there, print definition
print entry[$0]
} else
print $0 " not found"
}
#4 prompt user again for another term
{
printf("Enter another glossary term (q to quit): ")
}' glossary -