|
|
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, without including leap seconds. 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
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 (representing the last UTC second of 1969) from the error return value. Systems conforming to earlier versions of the C and POSIX standards (including older versions of FreeBSD) did not set *tloc in the error case. BSD
July 18, 2003 BSD