NAME

       clock_getcpuclockid - access a process CPU-time clock (ADVANCED REALTIME)

SYNOPSIS

       #include <time.h>

       int clock_getcpuclockid(pid_t pid, clockid_t *clock_id);

DESCRIPTION

       The  clock_getcpuclockid() function shall return the clock ID of the CPU-time clock of the
       process specified by pid. If the process described by pid exists and the  calling  process
       has permission, the clock ID of this clock shall be returned in clock_id.

       If  pid  is zero, the clock_getcpuclockid() function shall return the clock ID of the CPU-
       time clock of the process making the call, in clock_id.

       The conditions under which one process has permission to obtain the CPU-time clock  ID  of
       other processes are implementation-defined.

RETURN VALUE

       Upon  successful  completion, clock_getcpuclockid() shall return zero; otherwise, an error
       number shall be returned to indicate the error.

ERRORS

       The clock_getcpuclockid() function shall fail if:

       EPERM  The requesting process does not have permission to access the  CPU-time  clock  for
              the process.

       The clock_getcpuclockid() function may fail if:

       ESRCH  No process can be found corresponding to the process specified by pid.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       The  clock_getcpuclockid() function is part of the Process CPU-Time Clocks option and need
       not be provided on all implementations.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       clock_getres() , timer_create() , the Base  Definitions  volume  of  IEEE Std 1003.1-2001,
       <time.h>

COPYRIGHT

       Portions  of  this  text  are  reprinted  and  reproduced in electronic form from IEEE Std
       1003.1, 2003 Edition, Standard for Information Technology  --  Portable  Operating  System
       Interface  (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by
       the Institute of Electrical and Electronics Engineers, Inc and  The  Open  Group.  In  the
       event  of  any  discrepancy  between this version and the original IEEE and The Open Group
       Standard, the original IEEE and The Open Group  Standard  is  the  referee  document.  The
       original Standard can be obtained online at http://www.opengroup.org/unix/online.html .