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Linux 2.6 - man page for gettimeofday (linux section 3)

GETTIMEOFDAY(P) 					     POSIX Programmer's Manual						   GETTIMEOFDAY(P)

NAME
gettimeofday - get the date and time
SYNOPSIS
#include <sys/time.h> int gettimeofday(struct timeval *restrict tp, void *restrict tzp);
DESCRIPTION
The gettimeofday() function shall obtain the current time, expressed as seconds and microseconds since the Epoch, and store it in the timeval structure pointed to by tp. The resolution of the system clock is unspecified. If tzp is not a null pointer, the behavior is unspecified.
RETURN VALUE
The gettimeofday() function shall return 0 and no value shall be reserved to indicate an error.
ERRORS
No errors are defined. The following sections are informative.
EXAMPLES
None.
APPLICATION USAGE
None.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
ctime() , ftime() , the Base Definitions volume of IEEE Std 1003.1-2001, <sys/time.h>
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol- ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html .
IEEE
/The Open Group 2003 GETTIMEOFDAY(P)