times(2)							   System Calls 							  times(2)

NAME

       times - get process and child process times

SYNOPSIS

       #include <sys/times.h>
       #include <limits.h>

       clock_t times(struct tms *buffer);

DESCRIPTION

       The  times()  function  fills  the  tms	structure  pointed  to	by  buffer with time-accounting information. The tms structure, defined in
       <sys/times.h>, contains the following members:

       clock_t	  tms_utime;
       clock_t	  tms_stime;
       clock_t	  tms_cutime;
       clock_t	  tms_cstime;

       All times are reported in clock ticks. The specific value for a clock tick is defined by the variable CLK_TCK, found in	the  header  <lim-
       its.h>.

       The  times  of  a terminated child process are included in the tms_cutime and tms_cstime members of the parent when wait(3C) or waitpid(3C)
       returns the process ID of this terminated child.  If a child process has not waited for its children, their times will not be  included	in
       its times.

       The tms_utime member is the CPU time used while executing instructions in the user space of the calling process.

       The tms_stime member is the CPU time used by the system on behalf of the calling process.

       The tms_cutime member is the sum of the tms_utime and the tms_cutime of the child processes.

       The tms_cstime member is the sum of the tms_stime and the tms_cstime of the child processes.

RETURN VALUES

       Upon  successful completion, times() returns the elapsed real time, in clock ticks, since an arbitrary point in the past (for example, sys-
       tem start-up time). This point does not change from one invocation of times() within the process to another. The return value may  overflow
       the possible range of type clock_t. If times() fails, (clock_t)-1 is returned and errno is set to indicate the error.

ERRORS

       The times() function will fail if:

       EFAULT	       The buffer argument points to an illegal address.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Async-Signal-Safe 	   |
       +-----------------------------+-----------------------------+

SEE ALSO

       time(1), timex(1), exec(2), fork(2), time(2), waitid(2), wait(3C), waitpid(3C), attributes(5), standards(5)

SunOS 5.10							    14 May 1997 							  times(2)