osf1 man page for clock

clock(3)						     Library Functions Manual							  clock(3)

NAME
       clock - Reports CPU time used

LIBRARY
       Standard C Library (libc.so, libc.a)

SYNOPSIS
       #include <time.h>

       clock_t clock (void);

STANDARDS
       Interfaces documented on this reference page conform to industry standards as follows:

       clock():  XPG4, XPG4-UNIX

       Refer to the standards(5) reference page for more information about industry standards and associated tags.

DESCRIPTION
       The  clock() function reports the amount of processor time used by the calling process and each of its terminated child processes for which
       a wait function has been executed. When a child process does not wait for its children, its child-process times are  not  included  in  its
       times.

RETURN VALUES
       The  clock()  function returns the amount of processor time (in microseconds) used since the first call to clock().  To convert the time to
       seconds, divide it by CLOCKS_PER_SEC (which is defined to be 1,000,000 in <time.h>).  If the processor time used is not	available  or  its
       value cannot be represented, the clock() function returns (clock_t)-1.

RELATED INFORMATION
       Functions: ctime(3), getrusage(2), times(3), wait(2)

       Standards: standards(5) delim off

																	  clock(3)