lib/sys_un.in.h

   1 /* sys/un.h - definitions for UNIX domain sockets
   2
   3    Copyright 2024-2025 Free Software Foundation, Inc.
   4
   5    This file is free software: you can redistribute it and/or modify
   6    it under the terms of the GNU Lesser General Public License as
   7    published by the Free Software Foundation; either version 2.1 of the
   8    License, or (at your option) any later version.
   9
  10    This file is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public License
  16    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  17
  18 /* Written by Collin Funk.  */
  19
  20 #ifndef _@GUARD_PREFIX@_SYS_UN_H
  21
  22 #if __GNUC__ >= 3
  23 @PRAGMA_SYSTEM_HEADER@
  24 #endif
  25 @PRAGMA_COLUMNS@
  26
  27 #if @HAVE_SYS_UN_H@
  28
  29 /* On glibc, in C++ mode with clang, <stddef.h> and <string.h> need to be
  30    included before <sys/un.h>, because otherwise <sys/un.h> includes them inside
  31    an 'extern "C" { ... }' block, which leads to compilation errors in gnulib's
  32    <string.h> override.  */
  33 # if defined __cplusplus
  34 #  include <stddef.h>
  35 #  include <string.h>
  36 # endif
  37
  38 /* The include_next requires a split double-inclusion guard.  */
  39 # @INCLUDE_NEXT@ @NEXT_SYS_UN_H@
  40
  41 #endif
  42
  43 #ifndef _@GUARD_PREFIX@_SYS_UN_H
  44 #define _@GUARD_PREFIX@_SYS_UN_H 1
  45
  46 #if !@HAVE_SYS_UN_H@
  47
  48 /* A platform that lacks <sys/un.h>.  */
  49
  50 /* Windows requires <winsock2.h> to be included before <afunix.h>.  */
  51 # if @HAVE_WINSOCK2_H@
  52 #  include <winsock2.h>
  53 # endif
  54 # if @HAVE_AFUNIX_H@
  55 #  include <afunix.h>
  56 # endif
  57
  58 /* If a platform does not support AF_UNIX sockets 'struct sockaddr_un' will
  59    not be defined.  You may use HAVE_UNIXSOCKET after including <config.h>.  */
  60
  61 #endif
  62
  63 #if !@HAVE_SA_FAMILY_T_IN_SYS_UN_H@
  64 # if @HAVE_SA_FAMILY_T@
  65 /* A platform that has <sys/un.h> but which — unlike <sys/socket.h> — does not
  66    define the 'sa_family_t' type.  */
  67 #  include <sys/socket.h>
  68 # else
  69 /* A platform which does not define the 'sa_family_t' type at all.
  70    Define it here in the same way as in <sys/socket.h>.  */
  71 #  if !GNULIB_defined_sa_family_t
  72 /* On OS/2 kLIBC, sa_family_t is unsigned char unless TCPV40HDRS is defined. */
  73 #   if !defined __KLIBC__ || defined TCPV40HDRS
  74 typedef unsigned short  sa_family_t;
  75 #   else
  76 typedef unsigned char   sa_family_t;
  77 #   endif
  78 #   define GNULIB_defined_sa_family_t 1
  79 #  endif
  80 # endif
  81 #endif
  82
  83 #endif /* _@GUARD_PREFIX@_SYS_UN_H */
  84 #endif /* _@GUARD_PREFIX@_SYS_UN_H */