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Linux 2.6 - man page for clock_getcpuclockid (linux section 3posix)

CLOCK_GETCPUCLOCKID(P)		    POSIX Programmer's Manual		   CLOCK_GETCPUCLOCKID(P)

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 orig-
       inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group			       2003			   CLOCK_GETCPUCLOCKID(P)


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