AWK传参

"''$var'"

var="test"
awk 'BEGIN{print "'$var'"}'

'"$var"'

var="this is a test"
awk 'BEGIN{print "'"$var"'"}'

export变量，使用ENVIRON["var"]形式，获取环境变量的值

var="this is a test"; export var;
awk 'BEGIN{print ENVIRON["var"]}'

awk的-v选项

var="this is a test"
awk -v awk_var="$var" 'BEGIN {print awk_var}'