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posix_trace_stop(3) [linux man page]

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

NAME
posix_trace_start, posix_trace_stop - trace start and stop (TRACING) SYNOPSIS
#include <trace.h> int posix_trace_start(trace_id_t trid); int posix_trace_stop (trace_id_t trid); DESCRIPTION
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
Upon successful completion, these functions shall return a value of zero. Otherwise, they shall return the corresponding error number. ERRORS
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
None. APPLICATION USAGE
None. RATIONALE
None. FUTURE DIRECTIONS
None. SEE ALSO
posix_trace_create() , the Base Definitions volume of IEEE Std 1003.1-2001, <trace.h> COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol- ogy -- 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 . IEEE
/The Open Group 2003 POSIX_TRACE_START(P)

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POSIX_TRACE_CLEAR(P)					     POSIX Programmer's Manual					      POSIX_TRACE_CLEAR(P)

NAME
posix_trace_clear - clear trace stream and trace log (TRACING) SYNOPSIS
#include <sys/types.h> #include <trace.h> int posix_trace_clear(trace_id_t trid); DESCRIPTION
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 asso- ciated 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. RETURN VALUE
Upon successful completion, the posix_trace_clear() function shall return a value of zero. Otherwise, it shall return the corresponding error number. ERRORS
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. EXAMPLES
None. APPLICATION USAGE
None. RATIONALE
None. FUTURE DIRECTIONS
None. SEE ALSO
posix_trace_attr_init() , posix_trace_create() , posix_trace_flush() , posix_trace_get_attr() , the Base Definitions volume of IEEE Std 1003.1-2001, <sys/types.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 Technol- ogy -- 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 . IEEE
/The Open Group 2003 POSIX_TRACE_CLEAR(P)
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