The Open Group Base Specifications Issue 7
IEEE Std 1003.1-2008, 2016 Edition
Copyright © 2001-2016 The IEEE and The Open Group

NAME

posix_trace_get_attr, posix_trace_get_status - retrieve the trace attributes or trace status (TRACING)

SYNOPSIS

[OB TRC] [Option Start] #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); [Option End]

DESCRIPTION

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. [TRL] [Option Start] If the Trace Log option is supported, trid may represent a pre-recorded trace log. [Option End]

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. [TRL] [Option Start]  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. [Option End]

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. [TRL] [Option Start]  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:

[Option End]

RETURN VALUE

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.

ERRORS

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.

EXAMPLES

None.

APPLICATION USAGE

None.

RATIONALE

None.

FUTURE DIRECTIONS

The posix_trace_get_attr() and posix_trace_get_status() functions may be removed in a future version.

SEE ALSO

posix_trace_attr_destroy, posix_trace_close, posix_trace_create

XBD <trace.h>

CHANGE HISTORY

First released in Issue 6. Derived from IEEE Std 1003.1q-2000.

IEEE PASC Interpretation 1003.1 #123 is applied.

Issue 7

The posix_trace_get_attr() and posix_trace_get_status() functions are marked obsolescent.

End of informative text.

 

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