gmtime() - transform binary date and time value to ASCII UTC form
#include <time.h>
struct tm * gmtime (const time_t *clock)
The function gmtime(3) takes as an argument a time value representing the time in seconds since the Epoch (00:00:00 UTC, January 1, 1970; see time(2)). It converts the time value pointed at by clock, and returns a pointer to a struct tm (described below) which contains the broken-out time information for the value without adjusting for time zones or other factors such as Daylight Saving Time). It then returns a pointer to a tm structure (described below).
Thu Nov 24 18:22:48 1986\n\0
All the fields have constant width.
External declarations as well as the tm structure definition are in the <time.h> include file. The tm structure includes at least the following fields:
| int | tm_sec; | seconds (0 - 60) |
| int | tm_min; | minutes (0 - 59) |
| int | tm_hour; | hours (0 - 23) |
| int | tm_mday; | day of month (1 - 31) |
| int | tm_mon; | month of year (0 - 11) |
| int | tm_year; | year - 1900 |
| int | tm_wday; | day of week (Sunday = 0) |
| int | tm_yday; | day of year (0 - 365) |
| int | tm_isdst; | is summer time in effect? |
The field tm_isdst is non-zero if Daylight Saving Time is in effect.
date(1)
asctime(3)
ctime(3)
localtime(3)
getenv(3)
time(2)
tzset(3)
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