GETTIMEOFDAY(3)            POSIX Programmer's Manual           GETTIMEOFDAY(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
       gettimeofday -- get the date and time

SSYYNNOOPPSSIISS
       #include <sys/time.h>

       int gettimeofday(struct timeval *restrict _t_p, void *restrict _t_z_p);

DDEESSCCRRIIPPTTIIOONN
       The _g_e_t_t_i_m_e_o_f_d_a_y() function shall obtain the current time, expressed as
       seconds and microseconds since the Epoch, and store it in the ttiimmeevvaall
       structure pointed to by _t_p.  The resolution of the system clock is
       unspecified.

       If _t_z_p is not a null pointer, the behavior is unspecified.

RREETTUURRNN VVAALLUUEE
       The _g_e_t_t_i_m_e_o_f_d_a_y() function shall return 0 and no value shall be
       reserved to indicate an error.

EERRRROORRSS
       No errors are defined.

       _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
       Applications should use the _c_l_o_c_k___g_e_t_t_i_m_e() function instead of the
       obsolescent _g_e_t_t_i_m_e_o_f_d_a_y() function.

RRAATTIIOONNAALLEE
       None.

FFUUTTUURREE DDIIRREECCTTIIOONNSS
       The _g_e_t_t_i_m_e_o_f_d_a_y() function may be removed in a future version.

SSEEEE AALLSSOO
       _c_l_o_c_k___g_e_t_r_e_s(), _c_t_i_m_e()

       The Base Definitions volume of POSIX.1-2017, <<ssyyss__ttiimmee..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                      GETTIMEOFDAY(3)
