strace shows: select(5, [4], NULL, NULL, NULL) = 1 (in [4]) select(5, [4], NULL, NULL, NULL) = 1 (in [4]) select(5, [4], NULL, NULL, NULL) = 1 (in [4]) select(5, [4], NULL, NULL, NULL) = 1 (in [4]) select(5, [4], NULL, NULL, NULL) = 1 (in [4]) select(5, [4], NULL, NULL, NULL) = 1 (in [4]) [...]
strace shows:
select(5, [4], NULL, NULL, NULL) = 1 (in [4])
select(5, [4], NULL, NULL, NULL) = 1 (in [4])
select(5, [4], NULL, NULL, NULL) = 1 (in [4])
select(5, [4], NULL, NULL, NULL) = 1 (in [4])
select(5, [4], NULL, NULL, NULL) = 1 (in [4])
select(5, [4], NULL, NULL, NULL) = 1 (in [4])
[...]