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POSIX_TRACE_GET_ATTR(3P) POSIX Programmer's Manual POSIX_TRACE_GET_ATTR(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_get_attr, posix_trace_get_status — retrieve the trace
attributes or trace status (TRACING)
#include <trace.h>
int posix_trace_get_attr(trace_id_t trid, trace_attr_t *attr);
int posix_trace_get_status(trace_id_t trid,
struct posix_trace_status_info *statusinfo);
The posix_trace_get_attr() function shall copy the attributes of the
active trace stream identified by trid into the object pointed to by
the attr argument. If the Trace Log option is supported, trid may
represent a pre-recorded trace log.
The posix_trace_get_status() function shall return, in the structure
pointed to by the statusinfo argument, the current trace status for
the trace stream identified by the trid argument. These status values
returned in the structure pointed to by statusinfo shall have been
appropriately read to ensure that the returned values are consistent.
If the Trace Log option is supported and the trid argument refers to
a pre-recorded trace stream, the status shall be the status of the
completed trace stream.
Each time the posix_trace_get_status() function is used, the overrun
status of the trace stream shall be reset to POSIX_TRACE_NO_OVERRUN
immediately after the call completes. If the Trace Log option is
supported, the posix_trace_get_status() function shall behave the
same as when the option is not supported except for the following
differences:
* If the trid argument refers to a trace stream with log, each time
the posix_trace_get_status() function is used, the log overrun
status of the trace stream shall be reset to
POSIX_TRACE_NO_OVERRUN and the flush_error status shall be reset
to zero immediately after the call completes.
* If the trid argument refers to a pre-recorded trace stream, the
status returned shall be the status of the completed trace stream
and the status values of the trace stream shall not be reset.
Upon successful completion, these functions shall return a value of
zero. Otherwise, they shall return the corresponding error number.
The posix_trace_get_attr() function stores the trace attributes in
the object pointed to by attr, if successful.
The posix_trace_get_status() function stores the trace status in the
object pointed to by statusinfo, if successful.
These functions shall fail if:
EINVAL The trace stream argument trid does not correspond to a valid
active trace stream or a valid trace log.
The following sections are informative.
None.
None.
None.
The posix_trace_get_attr() and posix_trace_get_status() functions may
be removed in a future version.
posix_trace_attr_destroy(3p), posix_trace_close(3p),
posix_trace_create(3p)
The Base Definitions volume of POSIX.1‐2008, 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_GET_ATTR(3P)
Pages that refer to this page: trace.h(0p), posix_trace_attr_destroy(3p), posix_trace_attr_getclockres(3p), posix_trace_attr_getinherited(3p), posix_trace_attr_getlogsize(3p), posix_trace_clear(3p), posix_trace_close(3p), posix_trace_create(3p), posix_trace_get_status(3p)