1POSIX_TRACE_CLOSE(3P) POSIX Programmer's Manual POSIX_TRACE_CLOSE(3P)
2
6 This manual page is part of the POSIX Programmer's Manual. The Linux
7 implementation of this interface may differ (consult the corresponding
8 Linux manual page for details of Linux behavior), or the interface may
9 not be implemented on Linux.
10
13 posix_trace_close, posix_trace_open, posix_trace_rewind — trace log
14 management (TRACING)
15
17 #include <trace.h>
18 int posix_trace_close(trace_id_t trid);
20 int posix_trace_open(int file_desc, trace_id_t *trid);
21 int posix_trace_rewind(trace_id_t trid);
22
24 The posix_trace_close() function shall deallocate the trace log identi‐
25 fier indicated by trid, and all of its associated resources. If there
26 is no valid trace log pointed to by the trid, this function shall fail.
27 The posix_trace_open() function shall allocate the necessary resources
29 and establish the connection between a trace log identified by the
30 file_desc argument and a trace stream identifier identified by the
31 object pointed to by the trid argument. The file_desc argument should
32 be a valid open file descriptor that corresponds to a trace log. The
33 file_desc argument shall be open for reading. The current trace event
34 timestamp, which specifies the timestamp of the trace event that will
35 be read by the next call to posix_trace_getnext_event(), shall be set
36 to the timestamp of the oldest trace event recorded in the trace log
37 identified by trid.
38 The posix_trace_open() function shall return a trace stream identifier
40 in the variable pointed to by the trid argument, that may only be used
41 by the following functions:
42 posix_trace_close() posix_trace_get_attr()
44 posix_trace_eventid_equal() posix_trace_get_status()
45 posix_trace_eventid_get_name() posix_trace_getnext_event()
46 posix_trace_eventtypelist_getnext_id() posix_trace_rewind()
47 posix_trace_eventtypelist_rewind()
48 In particular, notice that the operations normally used by a trace con‐
50 troller process, such as posix_trace_start(), posix_trace_stop(), or
51 posix_trace_shutdown(), cannot be invoked using the trace stream iden‐
52 tifier returned by the posix_trace_open() function.
53 The posix_trace_rewind() function shall reset the current trace event
55 timestamp, which specifies the timestamp of the trace event that will
56 be read by the next call to posix_trace_getnext_event(), to the time‐
57 stamp of the oldest trace event recorded in the trace log identified by
58 trid.
59
61 Upon successful completion, these functions shall return a value of
62 zero. Otherwise, they shall return the corresponding error number.
63 If successful, the posix_trace_open() function stores the trace stream
65 identifier value in the object pointed to by trid.
66
68 The posix_trace_open() function shall fail if:
69 EINTR The operation was interrupted by a signal and thus no trace log
71 was opened.
72 EINVAL The object pointed to by file_desc does not correspond to a
74 valid trace log.
75 The posix_trace_close() and posix_trace_rewind() functions may fail if:
77 EINVAL The object pointed to by trid does not correspond to a valid
79 trace log.
80 The following sections are informative.
82
84 None.
85
87 None.
88
90 None.
91
93 The posix_trace_close(), posix_trace_open(), and posix_trace_rewind()
94 functions may be removed in a future version.
95
97 posix_trace_get_attr(), posix_trace_get_filter(), posix_trace_get‐
98 next_event()
99 The Base Definitions volume of POSIX.1‐2008, <trace.h>
101
103 Portions of this text are reprinted and reproduced in electronic form
104 from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
105 -- Portable Operating System Interface (POSIX), The Open Group Base
106 Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
107 cal and Electronics Engineers, Inc and The Open Group. (This is
108 POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the
109 event of any discrepancy between this version and the original IEEE and
110 The Open Group Standard, the original IEEE and The Open Group Standard
111 is the referee document. The original Standard can be obtained online
112 at http://www.unix.org/online.html .
113 Any typographical or formatting errors that appear in this page are
115 most likely to have been introduced during the conversion of the source
116 files to man page format. To report such errors, see https://www.ker‐
117 nel.org/doc/man-pages/reporting_bugs.html .
118IEEE/The Open Group 2013 POSIX_TRACE_CLOSE(3P)