grp.h(3)                   POSIX Programmer's Manual                  grp.h(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
       grp.h -- group structure

SSYYNNOOPPSSIISS
       #include <grp.h>

DDEESSCCRRIIPPTTIIOONN
       The _<_g_r_p_._h_> header shall declare the ggrroouupp structure, which shall
       include the following members:

           cchhaarr   **ggrr__nnaammee The name of the group.
           gid_t   gr_gid  Numerical group ID.
           char  **gr_mem  Pointer to a null-terminated array of character
                           pointers to member names.

       The _<_g_r_p_._h_> header shall define the ggiidd__tt and ssiizzee__tt types as described
       in _<_s_y_s_/_t_y_p_e_s_._h_>.

       The following shall be declared as functions and may also be defined as
       macros. Function prototypes shall be provided.

           vvooiidd           eennddggrreenntt((vvooiidd));;
           ssttrruucctt ggrroouupp  **ggeettggrreenntt((vvooiidd));;
           ssttrruucctt ggrroouupp  **ggeettggrrggiidd((ggiidd__tt));;
           iinntt            ggeettggrrggiidd__rr((ggiidd__tt,, ssttrruucctt ggrroouupp **,, cchhaarr **,,
                              ssiizzee__tt,, ssttrruucctt ggrroouupp ****));;
           ssttrruucctt ggrroouupp  **ggeettggrrnnaamm((ccoonnsstt cchhaarr **));;
           iinntt            ggeettggrrnnaamm__rr((ccoonnsstt cchhaarr **,, ssttrruucctt ggrroouupp **,, cchhaarr **,,
                              ssiizzee__tt ,, ssttrruucctt ggrroouupp ****));;
           vvooiidd           sseettggrreenntt((vvooiidd));;

       _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_.

AAPPPPLLIICCAATTIIOONN UUSSAAGGEE
       None.

RRAATTIIOONNAALLEE
       None.

FFUUTTUURREE DDIIRREECCTTIIOONNSS
       None.

SSEEEE AALLSSOO
       <<ssyyss__ttyyppeess..hh>>

       The System Interfaces volume of POSIX.1-2008, _e_n_d_g_r_e_n_t(), _g_e_t_g_r_g_i_d(),
       _g_e_t_g_r_n_a_m()

CCOOPPYYRRIIGGHHTT
       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
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .



IEEE/The Open Group                  2013                             grp.h(3)
