$ ./bin/env A=5 ./bin/repeat 2 A
A=5
A=5
$ ./bin/env A=5 B=6 C=7 ./bin/repeat 1 A 2 B 3 C
A=5
B=6
B=6
C=7
C=7
C=7
$ ./bin/env A=10 ./bin/repeat 1 B
B=
$ quit