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

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

       posix_trace_start, posix_trace_stop — trace start and stop (TRACING)

SYNOPSIS         top

       #include <trace.h>

       int posix_trace_start(trace_id_t trid);
       int posix_trace_stop (trace_id_t trid);

DESCRIPTION         top

       The posix_trace_start() and posix_trace_stop() functions,
       respectively, shall start and stop the trace stream identified by the
       argument trid.

       The effect of calling the posix_trace_start() function shall be
       recorded in the trace stream as the POSIX_TRACE_START system trace
       event and the status of the trace stream shall become
       POSIX_TRACE_RUNNING.  If the trace stream is in progress when this
       function is called, the POSIX_TRACE_START system trace event shall
       not be recorded and the trace stream shall continue to run. If the
       trace stream is full, the POSIX_TRACE_START system trace event shall
       not be recorded and the status of the trace stream shall not be
       changed.

       The effect of calling the posix_trace_stop() function shall be
       recorded in the trace stream as the POSIX_TRACE_STOP system trace
       event and the status of the trace stream shall become
       POSIX_TRACE_SUSPENDED.  If the trace stream is suspended when this
       function is called, the POSIX_TRACE_STOP system trace event shall not
       be recorded and the trace stream shall remain suspended. If the trace
       stream is full, the POSIX_TRACE_STOP system trace event shall not be
       recorded and the status of the trace stream shall not be changed.

RETURN VALUE         top

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

ERRORS         top

       These functions shall fail if:

       EINVAL The value of the argument trid does not correspond to an
              active trace stream and thus no trace stream was started or
              stopped.

       EINTR  The operation was interrupted by a signal and thus the trace
              stream was not necessarily started or stopped.

       The following sections are informative.

EXAMPLES         top

       None.

APPLICATION USAGE         top

       None.

RATIONALE         top

       None.

FUTURE DIRECTIONS         top

       The posix_trace_start() and posix_trace_stop() functions may be
       removed in a future version.

SEE ALSO         top

       posix_trace_create(3p)

       The Base Definitions volume of POSIX.1‐2008, trace.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               POSIX_TRACE_START(3P)