On 05/12/2018 04:21 PM, Jens Thoms Toerring wrote: > Hi, > > as observed recently settimeofday(2) may fail when called > with reasonably looking values for the time/date if they're > near to the Epoch. The reason is that it's not possible to > set the system time to a value that is lower than the number > of seconds since the system was booted - otherwise the time > of boot reported by 'uptime -s' would predate the Epoch. > > As this took some time to figure out I think it might be > worth to mention it in the NOTES section of the man page > of gettimeofday/settimeofday, see the attached patch. Hi Jens, It's pretty clear that there are some missing EINVAL cases in the manual page. However, I think the case should rather be documented as (tv.tv_set < 0 || tv.tv_usec < 0 || tv.tv_usec >= 1000000) giving EINVAL. But, perhaps I miss your point. What values were you specifying to settimeofday() that led to EINVAL? Cheers, Michael -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/ -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
