timespec_to_pgtimestamp
int timespec_to_pgtimestamp(const struct timespec *, char **);
error = timespec_to_pgtimestamp(&va->va_atime, &ts);
error = timespec_to_pgtimestamp(&va->va_mtime, &ts);
error = timespec_to_pgtimestamp(&va->va_ctime, &ts);
error = timespec_to_pgtimestamp(&va->va_birthtime, &ts);