source: trunk/essentials/sys-apps/gawk/test/procinfs.awk

BEGIN {
        printf "Initially, PROCINFO[\"FS\"] = %s\n", PROCINFO["FS"]
        FIELDWIDTHS = "3 4 5 6"
        printf "After assign to FIELDWIDTHS, PROCINFO[\"FS\"] = %s\n", PROCINFO["FS"]
        FS = FS
        printf "After assign to FS, PROCINFO[\"FS\"] = %s\n", PROCINFO["FS"]
}