c++ clock_gettime() and daylight savings

Question

I am using clock_gettime() in my C++ program to get the current time. However, the return value is seconds since epoch in UTC. This code can get messed up in my time zone durin

Answer 1

Realize that time also reports seconds since the beginning of 1970 (in a time_t). If you take the tv_sec member of the timespec and pass it to localtime or localtime_r, you should get what you want.

timespec tsv;
clock_gettime(CLOCK_REALTIME, &tsv);
time_t t = tsv.tv_sec; // just in case types aren't the same
tm tmv;
localtime_r(&t, &tmv); // populate tmv with local time info

And you can deal with the tv_nsec member of the timespec however you wish.