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.
The posix_trace_close() function shall deallocate the trace log
identifier indicated by trid, and all of its associated resources. If
there is no valid trace log pointed to by the trid, this function
The posix_trace_open() function shall allocate the necessary
resources and establish the connection between a trace log identified
by the file_desc argument and a trace stream identifier identified by
the object pointed to by the trid argument. The file_desc argument
should be a valid open file descriptor that corresponds to a trace
log. The file_desc argument shall be open for reading. The current
trace event timestamp, which specifies the timestamp of the trace
event that will be read by the next call to
posix_trace_getnext_event(), shall be set to the timestamp of the
oldest trace event recorded in the trace log identified by trid.
The posix_trace_open() function shall return a trace stream
identifier in the variable pointed to by the trid argument, that may
only be used by the following functions:
In particular, notice that the operations normally used by a trace
controller process, such as posix_trace_start(), posix_trace_stop(),
or posix_trace_shutdown(), cannot be invoked using the trace stream
identifier returned by the posix_trace_open() function.
The posix_trace_rewind() function shall reset the current trace event
timestamp, which specifies the timestamp of the trace event that will
be read by the next call to posix_trace_getnext_event(), to the
timestamp of the oldest trace event recorded in the trace log
identified by trid.
Upon successful completion, these functions shall return a value of
zero. Otherwise, they shall return the corresponding error number.
If successful, the posix_trace_open() function stores the trace
stream identifier value in the object pointed to by trid.
The posix_trace_open() function shall fail if:
EINTR The operation was interrupted by a signal and thus no trace
log was opened.
EINVAL The object pointed to by file_desc does not correspond to a
valid trace log.
The posix_trace_close() and posix_trace_rewind() functions may fail
EINVAL The object pointed to by trid does not correspond to a valid
The following sections are informative.
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
IEEE/The Open Group 2013 POSIX_TRACE_CLOSE(3P)