Answered by : wideeyed-wren-93c6to3i4fub

BEGIN { if (("date" | getline date_now) <= 0) { print "Can't get system date" > "/dev/stderr" exit 1 }

Source : https://www.gnu.org/software/gawk/manual/html_node/Exit-Statement.html | Last Update : Tue, 12 May 20