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_getclockres,       posix_trace_attr_getcreatetime,       posix_trace_attr_getgenversion,
       posix_trace_attr_getname, posix_trace_attr_setname — retrieve and set information about  a  trace  stream
       (TRACING)

SYNOPSIS

       #include <time.h>
       #include <trace.h>

       int posix_trace_attr_getclockres(const trace_attr_t *attr,
           struct timespec *resolution);
       int posix_trace_attr_getcreatetime(const trace_attr_t *attr,
           struct timespec *createtime);

       #include <trace.h>

       int posix_trace_attr_getgenversion(const trace_attr_t *attr,
           char *genversion);
       int posix_trace_attr_getname(const trace_attr_t *attr,
           char *tracename);
       int posix_trace_attr_setname(trace_attr_t *attr,
           const char *tracename);

DESCRIPTION

       The posix_trace_attr_getclockres() function shall copy the clock resolution of the clock used to generate
       timestamps  from  the clock-resolution attribute of the attributes object pointed to by the attr argument
       into the structure pointed to by the resolution argument.

       The posix_trace_attr_getcreatetime() function  shall  copy  the  trace  stream  creation  time  from  the
       creation-time  attribute  of  the  attributes  object  pointed to by the attr argument into the structure
       pointed to by the createtime argument. The creation-time attribute shall represent the time  of  creation
       of the trace stream.

       The  posix_trace_attr_getgenversion()  function shall copy the string containing version information from
       the generation-version attribute of the attributes object pointed to by the attr argument into the string
       pointed to by the genversion argument. The genversion argument shall be the address of a character  array
       which can store at least {TRACE_NAME_MAX} characters.

       The  posix_trace_attr_getname()  function shall copy the string containing the trace name from the trace-
       name attribute of the attributes object pointed to by the attr argument into the string pointed to by the
       tracename argument. The tracename argument shall be the address of a character array which can  store  at
       least {TRACE_NAME_MAX} characters.

       The  posix_trace_attr_setname() function shall set the name in the trace-name attribute of the attributes
       object pointed to by the attr argument, using the trace name string supplied by the  tracename  argument.
       If  the  supplied  string contains more than {TRACE_NAME_MAX} characters, the name copied into the trace-
       name attribute may be truncated to one less than the length of {TRACE_NAME_MAX} characters.  The  default
       value is a null string.

RETURN VALUE

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

       If successful, the posix_trace_attr_getclockres() function stores the clock-resolution attribute value in
       the object pointed to by resolution.  Otherwise, the content of this object is unspecified.

       If successful, the posix_trace_attr_getcreatetime() function stores the trace stream creation time in the
       object pointed to by createtime.  Otherwise, the content of this object is unspecified.

       If successful, the posix_trace_attr_getgenversion() function stores the trace version information in  the
       string pointed to by genversion.  Otherwise, the content of this string is unspecified.

       If  successful, the posix_trace_attr_getname() function stores the trace name in the string pointed to by
       tracename.  Otherwise, the content of this string is unspecified.

ERRORS

       The posix_trace_attr_getclockres(),  posix_trace_attr_getcreatetime(),  posix_trace_attr_getgenversion(),
       and posix_trace_attr_getname() functions may fail if:

       EINVAL The value specified by one of the arguments is invalid.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       The  posix_trace_attr_getclockres(),  posix_trace_attr_getcreatetime(), posix_trace_attr_getgenversion(),
       posix_trace_attr_getname(), and posix_trace_attr_setname() functions may be removed in a future version.

SEE ALSO

       posix_trace_attr_destroy(), posix_trace_create(), posix_trace_get_attr(), uname()

       The Base Definitions volume of POSIX.1‐2017, <time.h>, <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_GETCLOCKRES(3POSIX)