Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages

  
 
  

home | help
TIME(3)			 BSD Library Functions Manual		       TIME(3)

NAME
     time -- get time of day

LIBRARY
     Standard C	Library	(libc, -lc)

SYNOPSIS
     #include <time.h>

     time_t
     time(time_t *tloc);

DESCRIPTION
     The time()	function returns the value of time in seconds since 0 hours, 0
     minutes, 0	seconds, January 1, 1970, Coordinated Universal	Time.  If an
     error occurs, time() returns the value (time_t)-1.

     The return	value is also stored in	*tloc, provided	that tloc is non-null.

ERRORS
     The time()	function may fail for any of the reasons described in
     gettimeofday(2).

SEE ALSO
     clock_gettime(2), gettimeofday(2),	ctime(3)

STANDARDS
     The time function conforms	to IEEE	Std 1003.1-2001	("POSIX.1").

HISTORY
     A time() function appeared	in Version 6 AT&T UNIX.

BUGS
     Neither ISO/IEC 9899:1999 ("ISO C99") nor IEEE Std	1003.1-2001
     ("POSIX.1") requires time() to set	errno on failure; thus,	it is impossi-
     ble for an	application to distinguish the valid time value	-1 (represent-
     ing the last UTC second of	1969) from the error return value.

     Systems conforming	to earlier versions of the C and POSIX standards (in-
     cluding older versions of FreeBSD)	did not	set *tloc in the error case.

BSD				 July 18, 2003				   BSD

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | ERRORS | SEE ALSO | STANDARDS | HISTORY | BUGS

Want to link to this manual page? Use this URL:
<https://www.freebsd.org/cgi/man.cgi?query=time&sektion=3&manpath=FreeBSD+9.0-RELEASE>

home | help