STA_PPSSIGNAL
if (val & STA_PPSSIGNAL)
if ((time_status & STA_PPSTIME) && (time_status & STA_PPSSIGNAL))
time_status |= STA_PPSSIGNAL;
time_status &= ~(STA_PPSSIGNAL | STA_PPSJITTER |
#define STA_RONLY (STA_PPSSIGNAL | STA_PPSJITTER | STA_PPSWANDER | \
!(time_status & STA_PPSSIGNAL)) ||
!(time_status & STA_PPSSIGNAL)) ||