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POSIX_TRACE_CLEAR(3P) POSIX Programmer's Manual POSIX_TRACE_CLEAR(3P)
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.
posix_trace_clear — clear trace stream and trace log (TRACING)
#include <sys/types.h>
#include <trace.h>
int posix_trace_clear(trace_id_t trid);
The posix_trace_clear() function shall reinitialize the trace stream
identified by the argument trid as if it were returning from the
posix_trace_create() function, except that the same allocated
resources shall be reused, the mapping of trace event type
identifiers to trace event names shall be unchanged, and the trace
stream status shall remain unchanged (that is, if it was running, it
remains running and if it was suspended, it remains suspended).
All trace events in the trace stream recorded before the call to
posix_trace_clear() shall be lost. The posix_stream_full_status
status shall be set to POSIX_TRACE_NOT_FULL. There is no guarantee
that all trace events that occurred during the posix_trace_clear()
call are recorded; the behavior with respect to trace points that may
occur during this call is unspecified.
If the Trace Log option is supported and the trace stream has been
created with a log, the posix_trace_clear() function shall
reinitialize the trace stream with the same behavior as if the trace
stream was created without the log, plus it shall reinitialize the
trace log associated with the trace stream identified by the argument
trid as if it were returning from the posix_trace_create_withlog()
function, except that the same allocated resources, for the trace
log, may be reused and the associated trace stream status remains
unchanged. The first trace event recorded in the trace log after the
call to posix_trace_clear() shall be the same as the first trace
event recorded in the active trace stream after the call to
posix_trace_clear(). The posix_log_full_status status shall be set
to POSIX_TRACE_NOT_FULL. There is no guarantee that all trace events
that occurred during the posix_trace_clear() call are recorded in the
trace log; the behavior with respect to trace points that may occur
during this call is unspecified. If the log full policy is
POSIX_TRACE_APPEND, the effect of a call to this function is
unspecified for the trace log associated with the trace stream
identified by the trid argument.
Upon successful completion, the posix_trace_clear() function shall
return a value of zero. Otherwise, it shall return the corresponding
error number.
The posix_trace_clear() function shall fail if:
EINVAL The value of the trid argument does not correspond to an
active trace stream.
The following sections are informative.
None.
None.
None.
The posix_trace_clear() function may be removed in a future version.
posix_trace_attr_destroy(3p), posix_trace_create(3p),
posix_trace_get_attr(3p)
The Base Definitions volume of POSIX.1‐2008, sys_types.h(0p),
trace.h(0p)
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_CLEAR(3P)
Pages that refer to this page: trace.h(0p), posix_trace_create(3p)