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_POSIX_C_SOURCE    56 lib/fencing/st_rhcs.c #if _POSIX_C_SOURCE < 200809L && !(defined(O_SEARCH) || defined(O_PATH))
_POSIX_C_SOURCE    85 lib/fencing/st_rhcs.c #if _POSIX_C_SOURCE >= 200809L || defined(O_SEARCH) || defined(O_PATH)