PROLOG

       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

       posix_trace_attr_destroy,  posix_trace_attr_init  —  destroy  and  initialize the trace stream attributes
       object (TRACING)

SYNOPSIS

       #include <trace.h>

       int posix_trace_attr_destroy(trace_attr_t *attr);
       int posix_trace_attr_init(trace_attr_t *attr);

DESCRIPTION

       The posix_trace_attr_destroy()  function  shall  destroy  an  initialized  trace  attributes  object.   A
       destroyed  attr  attributes  object  can  be  reinitialized using posix_trace_attr_init(); the results of
       otherwise referencing the object after it has been destroyed are undefined.

       The posix_trace_attr_init() function shall initialize a trace attributes object  attr  with  the  default
       value  for  all  of  the  individual attributes used by a given implementation. The read-only generation-
       version and clock-resolution attributes of the newly initialized trace attributes object shall be set  to
       their appropriate values (see Section 2.11.1.2, posix_trace_status_info Structure).

       Results  are  undefined  if  posix_trace_attr_init()  is  called  specifying  an already initialized attr
       attributes object.

       Implementations may add extensions to the trace attributes object structure  as  permitted  in  the  Base
       Definitions volume of POSIX.1‐2017, Chapter 2, Conformance.

       The resulting attributes object (possibly modified by setting individual attributes values), when used by
       posix_trace_create(),  defines the attributes of the trace stream created. A single attributes object can
       be used in multiple calls to posix_trace_create().  After one or more trace  streams  have  been  created
       using  an  attributes object, any function affecting that attributes object, including destruction, shall
       not affect any trace stream previously created. An initialized attributes object also serves  to  receive
       the attributes of an existing trace stream or trace log when calling the posix_trace_get_attr() function.

RETURN VALUE

       Upon  successful  completion,  these functions shall return a value of zero. Otherwise, they shall return
       the corresponding error number.

ERRORS

       The posix_trace_attr_destroy() function may fail if:

       EINVAL The value of attr is invalid.

       The posix_trace_attr_init() function shall fail if:

       ENOMEM Insufficient memory exists to initialize the trace attributes object.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       The posix_trace_attr_destroy() and posix_trace_attr_init() functions may be removed in a future version.

SEE ALSO

       posix_trace_create(), posix_trace_get_attr(), uname()

       The Base Definitions volume of POSIX.1‐2017, <trace.h>

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1-2017, Standard
       for Information  Technology  --  Portable  Operating  System  Interface  (POSIX),  The  Open  Group  Base
       Specifications  Issue  7, 2018 Edition, Copyright (C) 2018 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 .

       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                                   2017                      POSIX_TRACE_ATTR_DESTROY(3POSIX)