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Convert calendar time to a broken-down time
#include <time.h>
struct tm* gmtime_r( const time_t* timer,
struct tm* result );
- timer
- A pointer to a time_t structure that contains the time
that you want to convert.
- result
- A pointer to a
tm
structure where the function can store the broken-down time.
libc
Use the -l c option to
qcc
to link against this library.
This library is usually included automatically.
The gmtime_r() 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) and stores it in
the
tm structure pointed
to by result.
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.
For more information, see
“Setting the time zone”
in the Configuring Your Environment chapter of the
Neutrino User's Guide.
A pointer to the
tm
structure containing the
broken-down time.
POSIX 1003.1 TSF
Safety: | |
Cancellation point |
No |
Interrupt handler |
No |
Signal handler |
Yes |
Thread |
Yes |
asctime(),
asctime_r(),
clock(),
ctime(),
difftime(),
localtime(),
localtime_r(),
mktime(),
strftime(),
time(),
tm,
tzset()
“Setting the time zone”
in the Configuring Your Environment chapter of the
Neutrino User's Guide
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