54 lines
1.0 KiB
C
54 lines
1.0 KiB
C
|
/*
|
||
|
|
FUNCTION
|
||
|
|
<<time>>---get current calendar time (as single number)
|
||
|
|
|
||
|
|
INDEX
|
||
|
|
time
|
||
|
|
|
||
|
|
ANSI_SYNOPSIS
|
||
|
|
#include <time.h>
|
||
|
|
time_t time(time_t *<[t]>);
|
||
|
|
|
||
|
|
TRAD_SYNOPSIS
|
||
|
|
#include <time.h>
|
||
|
|
time_t time(<[t]>)
|
||
|
|
time_t *<[t]>;
|
||
|
|
|
||
|
|
DESCRIPTION
|
||
|
|
<<time>> looks up the best available representation of the current
|
||
|
|
time and returns it, encoded as a <<time_t>>. It stores the same
|
||
|
|
value at <[t]> unless the argument is <<NULL>>.
|
||
|
|
|
||
|
|
RETURNS
|
||
|
|
A <<-1>> result means the current time is not available; otherwise the
|
||
|
|
result represents the current time.
|
||
|
|
|
||
|
|
PORTABILITY
|
||
|
|
ANSI C requires <<time>>.
|
||
|
|
|
||
|
|
Supporting OS subroutine required: Some implementations require
|
||
|
|
<<gettimeofday>>.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* Most times we have a system call in newlib/libc/sys/.. to do this job */
|
||
|
|
|
||
|
|
#include <_ansi.h>
|
||
|
|
#include <reent.h>
|
||
|
|
#include <sys/types.h>
|
||
|
|
#include <sys/time.h>
|
||
|
|
|
||
|
|
time_t
|
||
|
|
_DEFUN (time, (t),
|
||
|
|
time_t * t)
|
||
|
|
{
|
||
|
|
struct timeval now;
|
||
|
|
|
||
|
|
if (_gettimeofday_r (_REENT, &now, (struct timezone *) 0) >= 0)
|
||
|
|
{
|
||
|
|
if (t)
|
||
|
|
*t = now.tv_sec;
|
||
|
|
return now.tv_sec;
|
||
|
|
}
|
||
|
|
return -1;
|
||
|
|
}
|