GETHOSTNAME(3)             POSIX Programmer's Manual            GETHOSTNAME(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
       gethostname -- get name of current host

SSYYNNOOPPSSIISS
       #include <unistd.h>

       int gethostname(char *_n_a_m_e, size_t _n_a_m_e_l_e_n);

DDEESSCCRRIIPPTTIIOONN
       The _g_e_t_h_o_s_t_n_a_m_e() function shall return the standard host name for the
       current machine.  The _n_a_m_e_l_e_n argument shall specify the size of the
       array pointed to by the _n_a_m_e argument. The returned name shall be null-
       terminated, except that if _n_a_m_e_l_e_n is an insufficient length to hold
       the host name, then the returned name shall be truncated and it is
       unspecified whether the returned name is null-terminated.

       Host names are limited to {HOST_NAME_MAX} bytes.

RREETTUURRNN VVAALLUUEE
       Upon successful completion, 0 shall be returned; otherwise, -1 shall be
       returned.

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
       None.

RRAATTIIOONNAALLEE
       None.

FFUUTTUURREE DDIIRREECCTTIIOONNSS
       None.

SSEEEE AALLSSOO
       _g_e_t_h_o_s_t_i_d(), _u_n_a_m_e()

       The Base Definitions volume of POSIX.1-2017, <<uunniissttdd..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                       GETHOSTNAME(3)
