PROLOG | NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT

CLOCK_GETCPUCLOCKID(3P)   POSIX Programmer's Manual  CLOCK_GETCPUCLOCKID(3P)

PROLOG         top

       This manual page is part of the POSIX Programmer's Manual.  The Linux
       implementation of this interface may differ (consult the
       corresponding Linux manual page for details of Linux behavior), or
       the interface may not be implemented on Linux.

NAME         top

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

SYNOPSIS         top

       #include <time.h>

       int clock_getcpuclockid(pid_t pid, clockid_t *clock_id);

DESCRIPTION         top

       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         top

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

ERRORS         top

       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         top

       None.

APPLICATION USAGE         top

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

RATIONALE         top

       None.

FUTURE DIRECTIONS         top

       None.

SEE ALSO         top

       clock_getres(3p), timer_create(3p)

       The Base Definitions volume of POSIX.1‐2008, time.h(0p)

COPYRIGHT         top

       Portions of this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2013 Edition, Standard for Information
       Technology -- Portable Operating System Interface (POSIX), The Open
       Group Base Specifications Issue 7, Copyright (C) 2013 by the
       Institute of Electrical and Electronics Engineers, Inc and The Open
       Group.  (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1
       applied.) 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.unix.org/online.html .

       Any typographical or formatting errors that appear in this page are
       most likely to have been introduced during the conversion of the
       source files to man page format. To report such errors, see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group                 2013             CLOCK_GETCPUCLOCKID(3P)