awk/gnu/gsubtst8.awk

*e6d6c189SCody Peter Mello{
*e6d6c189SCody Peter Mello        OFS = " " $2 " "
*e6d6c189SCody Peter Mello        gsub("foo", "_", OFS)
*e6d6c189SCody Peter Mello        print $1, $2
*e6d6c189SCody Peter Mello}