PARA_ERROR(F_GETFL, "failed to get fd flags"), \
PARA_ERROR(F_SETFL, "failed to set fd flags"), \
PARA_ERROR(FGETS, "fgets error"), \
PARA_ERROR(F_GETFL, "failed to get fd flags"), \
PARA_ERROR(F_SETFL, "failed to set fd flags"), \
PARA_ERROR(FGETS, "fgets error"), \