POSIX_TRACE_START(3)       POSIX Programmer's Manual      POSIX_TRACE_START(3)



PPRROOLLOOGG
       This manual page is part of the POSIX Programmer's Manual.  The OS
       implementation of this interface may differ (consult the corresponding
       OS manual page for details of OS behavior), or the interface may not be
       implemented on OS.

NNAAMMEE
       posix_trace_start, posix_trace_stop -- trace start and stop (TTRRAACCIINNGG)

SSYYNNOOPPSSIISS
       #include <trace.h>

       int posix_trace_start(trace_id_t _t_r_i_d);
       int posix_trace_stop (trace_id_t _t_r_i_d);

DDEESSCCRRIIPPTTIIOONN
       The _p_o_s_i_x___t_r_a_c_e___s_t_a_r_t() and _p_o_s_i_x___t_r_a_c_e___s_t_o_p() functions, respectively,
       shall start and stop the trace stream identified by the argument _t_r_i_d.

       The effect of calling the _p_o_s_i_x___t_r_a_c_e___s_t_a_r_t() 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 _p_o_s_i_x___t_r_a_c_e___s_t_o_p() 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.

RREETTUURRNN VVAALLUUEE
       Upon successful completion, these functions shall return a value of
       zero. Otherwise, they shall return the corresponding error number.

EERRRROORRSS
       These functions shall fail if:

       EEIINNVVAALL The value of the argument _t_r_i_d does not correspond to an active
              trace stream and thus no trace stream was started or stopped.

       EEIINNTTRR  The operation was interrupted by a signal and thus the trace
              stream was not necessarily started or stopped.

       _T_h_e _f_o_l_l_o_w_i_n_g _s_e_c_t_i_o_n_s _a_r_e _i_n_f_o_r_m_a_t_i_v_e_.

EEXXAAMMPPLLEESS
       None.

AAPPPPLLIICCAATTIIOONN UUSSAAGGEE
       None.

RRAATTIIOONNAALLEE
       None.

FFUUTTUURREE DDIIRREECCTTIIOONNSS
       The _p_o_s_i_x___t_r_a_c_e___s_t_a_r_t() and _p_o_s_i_x___t_r_a_c_e___s_t_o_p() functions may be removed
       in a future version.

SSEEEE AALLSSOO
       _p_o_s_i_x___t_r_a_c_e___c_r_e_a_t_e()

       The Base Definitions volume of POSIX.1-2017, <<ttrraaccee..hh>>

CCOOPPYYRRIIGGHHTT
       Portions of this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1-2017, Standard for Information Technology --
       Portable Operating System Interface (POSIX), The Open Group Base
       Specifications Issue 7, 2018 Edition, Copyright (C) 2018 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 .

       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                  2017                 POSIX_TRACE_START(3)
