netbsd man page for times

TIMES(3)						   BSD Library Functions Manual 						  TIMES(3)

NAME
     times -- process times

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <sys/times.h>

     clock_t
     times(struct tms *tp);

DESCRIPTION
     This interface is obsoleted by getrusage(2) and gettimeofday(2).

     The times() function returns the value of time in clock ticks since 0 hours, 0 minutes, 0 seconds, January 1, 1970, Coordinated Universal
     Time (UTC).

     The number of clock ticks per second may be determined by calling sysconf(3) with the _SC_CLK_TCK request.  It is generally (but not always)
     between 60 and 1024.

     Note that at the common rate of 100 ticks per second on many NetBSD ports, and with a 32-bit unsigned clock_t, this value first wrapped in
     1971.

     The times() call also fills in the structure pointed to by tp with time-accounting information.

     The tms structure is defined as follows:

	   typedef struct {
		   clock_t tms_utime;
		   clock_t tms_stime;
		   clock_t tms_cutime;
		   clock_t tms_cstime;
	   }

     The elements of this structure are defined as follows:

     tms_utime	 The CPU time charged for the execution of user instructions.

     tms_stime	 The CPU time charged for execution by the system on behalf of the process.

     tms_cutime  The sum of the tms_utime s and tms_cutime s of the child processes.

     tms_cstime  The sum of the tms_stimes and tms_cstimes of the child processes.

     All times are measured in clock ticks, as defined above.  Note that at 100 ticks per second, and with a 32-bit unsigned clock_t, the values
     wrap after 497 days.

     The times of a terminated child process are included in the tms_cutime and tms_cstime elements of the parent when one of the wait(2) func-
     tions returns the process ID of the terminated child to the parent.  If an error occurs, times() returns the value ((clock_t)-1), and sets
     errno to indicate the error.

ERRORS
     The times() function may fail and set the global variable errno for any of the errors specified for the library routines getrusage(2) and
     gettimeofday(2).

SEE ALSO
     time(1), getrusage(2), gettimeofday(2), wait(2), sysconf(3)

STANDARDS
     The times() function conforms to ISO/IEC 9945-1:1990 (``POSIX.1'').

BSD
								   June 4, 1993 							       BSD