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

       None.

SEE ALSO

       posix_trace_attr_init() , posix_trace_create() , posix_trace_get_attr() , uname() , the Base  Definitions
       volume of IEEE Std 1003.1-2001, <time.h>, <trace.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
       original Standard can be obtained online at http://www.opengroup.org/unix/online.html .