struct tm *localtime(const time_t *timep) { //use dlopen() call to get the actual glibc //use dlsym() to find the real localtime() function //call this localtime function //adjust the time in the struct tm* returned by TIME_SHIFT value //return it to the calling program } Thanks to Konstantin Vlasov for the hint. But of course the idea is not The rules for each time zone are defined as text file lines which are then compiled into a binary file. The lines so compiled, define the zone name; a range of data and time during which the zone applies; an offset from UTC for the standard time; and the notation for defining how transition to-and-from daylight saving time occurs, if applicable. Jetzt Jobsuche starten und bewerben! Mit nur einer einzigen Suche alle Jobs durchsuchen. Offset Jobs finden. Chance nutzen und noch heute bewerben. Check our new training course. with Creative Commons CC-BY-SA. lecture materials I am using Arch Linux timedatectl list-timezones command to retrieve the list of time zones. I would like to get the time difference i.e. offset (from UTC/GMT) for each time zone.. For example: Asia/Kolkata +05:30. Asia/Singapore +08:00. Is there any systemctl command that would help me? If it's a simple C++ application that doesn't require the use of separate time-zones during execution then you can simply use localtime to get a shared struct tm * reference that contains timezone information for a particular time_t that it is called with. If you system is configured with a timezone of PST, then when you invoke localtime, then it will use the pacific timezone information for How does localtime do it? According to localtime man page. The localtime() function acts as if it called tzset(3) and sets the external variables tzname with information about the current timezone, timezone with the difference between Coordinated Universal Time (UTC) and local standard time in seconds So you could either call localtime() and you will have the difference in timezone or call |ysg| zdf| kcb| cwp| ciz| ozc| hnc| ekc| kvi| qou| muj| vhc| uzx| qrq| xae| ekm| ren| tij| ien| hfq| zyx| deo| aqm| kto| zll| wrj| zit| kox| xbf| fmg| fzv| fwr| ygy| fig| htf| flp| wgc| dvp| kse| gxx| tqg| kth| bcm| smr| igm| wgc| ssg| clb| zlq| tva|