efi_time.c File Reference

EFI time source. More...

#include <string.h>
#include <errno.h>
#include <time.h>
#include <ipxe/time.h>
#include <ipxe/efi/efi.h>

Go to the source code of this file.

Functions
	FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)
	FILE_SECBOOT (PERMITTED)
static time_t	efi_get_time (void)
	Get current time in seconds.
	PROVIDE_TIME (efi, time_now, efi_get_time)

Detailed Description

EFI time source.

Definition in file efi_time.c.

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER_OR_UBDL

)

FILE_SECBOOT()

FILE_SECBOOT

(

PERMITTED

)

efi_get_time()

time_t efi_get_time ( void )

static

Get current time in seconds.

Return values

time	Time, in seconds

Definition at line 44 of file efi_time.c.

                                    {
        EFI_RUNTIME_SERVICES *rs = efi_systab->RuntimeServices;
        EFI_TIME time;
        struct tm tm;
        EFI_STATUS efirc;
        int rc;
 
        /* Get current time and date */
        if ( ( efirc = rs->GetTime ( &time, NULL ) ) != 0 ) {
                rc = -EEFI ( efirc );
                DBGC ( rs, "EFITIME could not get system time: %s\n",
                       strerror ( rc ) );
                /* Nothing meaningful we can return */
                return 0;
        }
 
        /* Construct broken-down time */
        memset ( &tm, 0, sizeof ( tm ) );
        tm.tm_sec = time.Second;
        tm.tm_min = time.Minute;
        tm.tm_hour = time.Hour;
        tm.tm_mday = time.Day;
        tm.tm_mon = ( time.Month - 1 );
        tm.tm_year = ( time.Year - 1900 );
        DBGC ( rs, "EFITIME is %04d-%02d-%02d %02d:%02d:%02d\n",
               ( tm.tm_year + 1900 ), ( tm.tm_mon + 1 ),
               tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec );
 
        /* Convert to seconds since the Epoch */
        return mktime ( &tm );
}

References EFI_TIME::Day, DBGC, EEFI, efi_systab, EFI_RUNTIME_SERVICES::GetTime, EFI_TIME::Hour, memset(), EFI_TIME::Minute, mktime(), EFI_TIME::Month, NULL, rc, EFI_TIME::Second, strerror(), tm::tm_hour, tm::tm_mday, tm::tm_min, tm::tm_mon, tm::tm_sec, tm::tm_year, and EFI_TIME::Year.

Referenced by PROVIDE_TIME().

PROVIDE_TIME()

PROVIDE_TIME	(	efi	,
		time_now	,
		efi_get_time	)

References efi_get_time(), and time_now().