Convert calendar time to local time
#include <time.h> struct tm *localtime( const time_t *timer );
- A pointer to a time_t object that contains the calendar time that you want to convert.
Use the -l c option to qcc to link against this library. This library is usually included automatically.
You typically get a calendar time by calling time() . That time is Coordinated Universal Time (UTC, formerly known as Greenwich Mean Time or GMT).
The localtime() function places the converted time in a static tm structure that's reused each time you call localtime() or gmtime() . Calling asctime() or ctime() could also change the data in this static buffer.
In a multithreaded application, use localtime_r() .
You typically use the date command to set the computer's internal clock using Coordinated Universal Time (UTC). Use the TZ environment variable or _CS_TIMEZONE configuration string to establish the local time zone.
A pointer to the static tm structure containing the time information.
Last modified: 2013-12-23