Convert calendar time to a broken-down time
#include <time.h> struct tm* gmtime( const time_t* timer );
- A pointer to a time_t structure that contains the time that you want to convert.
Use the -l c option to qcc to link against this library. This library is usually included automatically.
The gmtime() function converts the calendar time pointed to by timer into a broken-down time, expressed as Coordinated Universal Time (UTC) (formerly known as Greenwich Mean Time or GMT).
The gmtime() function places the converted time in a static structure that's reused each time you call gmtime() or localtime() . Calling asctime() or ctime() could also change the data in this static buffer.
In a multithreaded application, use gmtime_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 that contains the broken-down time.
Last modified: 2013-12-23