1BEGIN {
2    cat  = "cat ; exit 3"
3    print system("echo xxx | (cat ; exit 4)")
4
5    print "YYY" | cat
6
7    print close(cat)
8
9    echo = "echo boo ; exit 5"
10    echo | getline boo
11    print "got", boo
12
13    print close(echo)
14}
15