[W]

1. WAIT
2. WAKEUP_CHARS
3. WAS_RESET
4. WAS_SENSE
5. WAS_TIMEDOUT
6. WCOREDUMP
7. WEXITSTATUS
8. WIFEXITED
9. WIFSIGNALED
10. WIFSTOPPED
11. WIN_DIAGNOSE
12. WIN_FORMAT
13. WIN_INIT
14. WIN_READ
15. WIN_RESTORE
16. WIN_SEEK
17. WIN_SPECIFY
18. WIN_VERIFY
19. WIN_WRITE
20. WNOHANG
21. WRERR_STAT
22. WRITE
23. WRITEA
24. WRITE_10
25. WRITE_6
26. WRITE_VERIFY
27. WSTOPSIG
28. WTERMSIG
29. WUNTRACED
30. W_OK