1POSIX_TRACE_ATTR_DESTROY(3P)POSIX Programmer's ManuaPlOSIX_TRACE_ATTR_DESTROY(3P)
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PROLOG

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

12       posix_trace_attr_destroy, posix_trace_attr_init — destroy and  initial‐
13       ize the trace stream attributes object (TRACING)
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SYNOPSIS

16       #include <trace.h>
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18       int posix_trace_attr_destroy(trace_attr_t *attr);
19       int posix_trace_attr_init(trace_attr_t *attr);
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DESCRIPTION

22       The  posix_trace_attr_destroy()  function  shall destroy an initialized
23       trace attributes object.  A destroyed attr  attributes  object  can  be
24       reinitialized  using  posix_trace_attr_init(); the results of otherwise
25       referencing the object after it has been destroyed are undefined.
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27       The  posix_trace_attr_init()  function   shall   initialize   a   trace
28       attributes object attr with the default value for all of the individual
29       attributes used by a given implementation.  The  read-only  generation-
30       version  and clock-resolution attributes of the newly initialized trace
31       attributes object shall be set to their appropriate values (see Section
32       2.11.1.2, posix_trace_status_info Structure).
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34       Results  are  undefined if posix_trace_attr_init() is called specifying
35       an already initialized attr attributes object.
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37       Implementations may add  extensions  to  the  trace  attributes  object
38       structure  as permitted in the Base Definitions volume of POSIX.1‐2017,
39       Chapter 2, Conformance.
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41       The resulting attributes object (possibly modified by setting  individ‐
42       ual  attributes values), when used by posix_trace_create(), defines the
43       attributes of the trace stream created. A single attributes object  can
44       be  used  in multiple calls to posix_trace_create().  After one or more
45       trace streams have been created using an attributes object,  any  func‐
46       tion affecting that attributes object, including destruction, shall not
47       affect any trace stream previously created. An  initialized  attributes
48       object  also  serves  to  receive  the  attributes of an existing trace
49       stream or trace log when calling the posix_trace_get_attr() function.
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RETURN VALUE

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

56       The posix_trace_attr_destroy() function may fail if:
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58       EINVAL The value of attr is invalid.
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60       The posix_trace_attr_init() function shall fail if:
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62       ENOMEM Insufficient  memory  exists  to initialize the trace attributes
63              object.
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65       The following sections are informative.
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EXAMPLES

68       None.
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APPLICATION USAGE

71       None.
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RATIONALE

74       None.
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FUTURE DIRECTIONS

77       The posix_trace_attr_destroy()  and  posix_trace_attr_init()  functions
78       may be removed in a future version.
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SEE ALSO

81       posix_trace_create(), posix_trace_get_attr(), uname()
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83       The Base Definitions volume of POSIX.1‐2017, <trace.h>
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86       Portions  of  this text are reprinted and reproduced in electronic form
87       from IEEE Std 1003.1-2017, Standard for Information Technology --  Por‐
88       table  Operating System Interface (POSIX), The Open Group Base Specifi‐
89       cations Issue 7, 2018 Edition, Copyright (C) 2018 by the  Institute  of
90       Electrical  and  Electronics Engineers, Inc and The Open Group.  In the
91       event of any discrepancy between this version and the original IEEE and
92       The  Open Group Standard, the original IEEE and The Open Group Standard
93       is the referee document. The original Standard can be  obtained  online
94       at http://www.opengroup.org/unix/online.html .
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96       Any  typographical  or  formatting  errors that appear in this page are
97       most likely to have been introduced during the conversion of the source
98       files  to  man page format. To report such errors, see https://www.ker
99       nel.org/doc/man-pages/reporting_bugs.html .
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103IEEE/The Open Group                  2017         POSIX_TRACE_ATTR_DESTROY(3P)
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