| 1 | /* Substitute for <sys/select.h>.
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| 2 | Copyright (C) 2007-2022 Free Software Foundation, Inc.
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| 3 |
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| 4 | This file is free software: you can redistribute it and/or modify
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| 5 | it under the terms of the GNU Lesser General Public License as
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| 6 | published by the Free Software Foundation; either version 2.1 of the
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| 7 | License, or (at your option) any later version.
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| 8 |
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| 9 | This file is distributed in the hope that it will be useful,
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 12 | GNU Lesser General Public License for more details.
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| 13 |
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| 14 | You should have received a copy of the GNU Lesser General Public License
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| 15 | along with this program. If not, see <https://www.gnu.org/licenses/>. */
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| 16 |
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| 17 | # if __GNUC__ >= 3
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| 18 | @PRAGMA_SYSTEM_HEADER@
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| 19 | # endif
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| 20 | @PRAGMA_COLUMNS@
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| 21 |
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| 22 | /* On OSF/1 and Solaris 2.6, <sys/types.h> and <sys/time.h>
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| 23 | both include <sys/select.h>.
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| 24 | On Cygwin and OpenBSD, <sys/time.h> includes <sys/select.h>.
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| 25 | Simply delegate to the system's header in this case. */
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| 26 | #if (@HAVE_SYS_SELECT_H@ \
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| 27 | && !defined _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TYPES_H \
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| 28 | && ((defined __osf__ && defined _SYS_TYPES_H_ \
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| 29 | && defined _OSF_SOURCE) \
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| 30 | || (defined __sun && defined _SYS_TYPES_H \
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| 31 | && (! (defined _XOPEN_SOURCE || defined _POSIX_C_SOURCE) \
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| 32 | || defined __EXTENSIONS__))))
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| 33 |
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| 34 | # define _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TYPES_H
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| 35 | # @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@
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| 36 |
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| 37 | #elif (@HAVE_SYS_SELECT_H@ \
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| 38 | && (defined _CYGWIN_SYS_TIME_H \
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| 39 | || (!defined _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TIME_H \
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| 40 | && ((defined __osf__ && defined _SYS_TIME_H_ \
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| 41 | && defined _OSF_SOURCE) \
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| 42 | || (defined __OpenBSD__ && defined _SYS_TIME_H_) \
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| 43 | || (defined __sun && defined _SYS_TIME_H \
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| 44 | && (! (defined _XOPEN_SOURCE \
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| 45 | || defined _POSIX_C_SOURCE) \
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| 46 | || defined __EXTENSIONS__))))))
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| 47 |
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| 48 | # define _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TIME_H
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| 49 | # @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@
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| 50 |
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| 51 | /* On IRIX 6.5, <sys/timespec.h> includes <sys/types.h>, which includes
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| 52 | <sys/bsd_types.h>, which includes <sys/select.h>. At this point we cannot
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| 53 | include <signal.h>, because that includes <internal/signal_core.h>, which
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| 54 | gives a syntax error because <sys/timespec.h> has not been completely
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| 55 | processed. Simply delegate to the system's header in this case. */
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| 56 | #elif @HAVE_SYS_SELECT_H@ && defined __sgi && (defined _SYS_BSD_TYPES_H && !defined _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_BSD_TYPES_H)
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| 57 |
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| 58 | # define _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_BSD_TYPES_H
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| 59 | # @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@
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| 60 |
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| 61 | /* On OpenBSD 5.0, <pthread.h> includes <sys/types.h>, which includes
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| 62 | <sys/select.h>. At this point we cannot include <signal.h>, because that
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| 63 | includes gnulib's pthread.h override, which gives a syntax error because
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| 64 | /usr/include/pthread.h has not been completely processed. Simply delegate
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| 65 | to the system's header in this case. */
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| 66 | #elif @HAVE_SYS_SELECT_H@ && defined __OpenBSD__ && (defined _PTHREAD_H_ && !defined PTHREAD_MUTEX_INITIALIZER)
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| 67 |
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| 68 | # @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@
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| 69 |
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| 70 | #else
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| 71 |
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| 72 | #ifndef _@GUARD_PREFIX@_SYS_SELECT_H
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| 73 |
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| 74 | /* On many platforms, <sys/select.h> assumes prior inclusion of
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| 75 | <sys/types.h>. Also, mingw defines sigset_t there, instead of
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| 76 | in <signal.h> where it belongs. */
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| 77 | #include <sys/types.h>
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| 78 |
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| 79 | #if @HAVE_SYS_SELECT_H@
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| 80 |
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| 81 | /* On OSF/1 4.0, <sys/select.h> provides only a forward declaration
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| 82 | of 'struct timeval', and no definition of this type.
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| 83 | Also, Mac OS X, AIX, HP-UX, IRIX, Solaris, Interix declare select()
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| 84 | in <sys/time.h>.
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| 85 | But avoid namespace pollution on glibc systems, a circular include
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| 86 | <sys/select.h> -> <sys/time.h> -> <sys/select.h> on FreeBSD 13.1, and
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| 87 | "unknown type name" problems on Cygwin. */
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| 88 | # if !(defined __GLIBC__ || defined __FreeBSD__ || defined __CYGWIN__)
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| 89 | # include <sys/time.h>
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| 90 | # endif
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| 91 |
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| 92 | /* On AIX 7 and Solaris 10, <sys/select.h> provides an FD_ZERO implementation
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| 93 | that relies on memset(), but without including <string.h>.
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| 94 | But in any case avoid namespace pollution on glibc systems. */
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| 95 | # if (defined __OpenBSD__ || defined _AIX || defined __sun || defined __osf__ || defined __BEOS__) \
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| 96 | && ! defined __GLIBC__
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| 97 | # include <string.h>
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| 98 | # endif
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| 99 |
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| 100 | /* The include_next requires a split double-inclusion guard. */
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| 101 | # @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@
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| 102 |
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| 103 | #endif
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| 104 |
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| 105 | /* Get definition of 'sigset_t'.
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| 106 | But avoid namespace pollution on glibc systems and "unknown type
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| 107 | name" problems on Cygwin.
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| 108 | On OS/2 kLIBC, sigset_t is defined in <sys/select.h>, too. In addition,
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| 109 | if <sys/param.h> is included, <types.h> -> <sys/types.h> -> <sys/select.h>
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| 110 | are included. Then <signal.h> -> <pthread.h> are included by GNULIB. By the
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| 111 | way, <pthread.h> requires PAGE_SIZE defined in <sys/param.h>. However,
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| 112 | <sys/param.h> has not been processed, yet. As a result, 'PAGE_SIZE'
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| 113 | undeclared error occurs in <pthread.h>.
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| 114 | Do this after the include_next (for the sake of OpenBSD 5.0) but before
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| 115 | the split double-inclusion guard (for the sake of Solaris). */
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| 116 | #if !((defined __GLIBC__ || defined __CYGWIN__ || defined __KLIBC__) \
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| 117 | && !defined __UCLIBC__)
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| 118 | # include <signal.h>
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| 119 | #endif
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| 120 |
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| 121 | #ifndef _@GUARD_PREFIX@_SYS_SELECT_H
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| 122 | #define _@GUARD_PREFIX@_SYS_SELECT_H
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| 123 |
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| 124 | #if !@HAVE_SYS_SELECT_H@
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| 125 | /* A platform that lacks <sys/select.h>. */
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| 126 | /* Get the 'struct timeval' and 'fd_set' types and the FD_* macros
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| 127 | on most platforms. */
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| 128 | # include <sys/time.h>
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| 129 | /* On HP-UX 11, <sys/time.h> provides an FD_ZERO implementation
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| 130 | that relies on memset(), but without including <string.h>. */
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| 131 | # if defined __hpux
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| 132 | # include <string.h>
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| 133 | # endif
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| 134 | /* On native Windows platforms:
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| 135 | Get the 'fd_set' type.
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| 136 | Get the close() declaration before we override it. */
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| 137 | # if @HAVE_WINSOCK2_H@
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| 138 | # if !defined _GL_INCLUDING_WINSOCK2_H
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| 139 | # define _GL_INCLUDING_WINSOCK2_H
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| 140 | # include <winsock2.h>
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| 141 | # undef _GL_INCLUDING_WINSOCK2_H
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| 142 | # endif
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| 143 | # include <io.h>
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| 144 | # endif
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| 145 | #endif
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| 146 |
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| 147 | /* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */
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| 148 |
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| 149 | /* The definition of _GL_WARN_ON_USE is copied here. */
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| 150 |
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| 151 |
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| 152 | /* Fix some definitions from <winsock2.h>. */
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| 153 |
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| 154 | #if @HAVE_WINSOCK2_H@
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| 155 |
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| 156 | # if !GNULIB_defined_rpl_fd_isset
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| 157 |
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| 158 | /* Re-define FD_ISSET to avoid a WSA call while we are not using
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| 159 | network sockets. */
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| 160 | static int
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| 161 | rpl_fd_isset (SOCKET fd, fd_set * set)
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| 162 | {
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| 163 | u_int i;
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| 164 | if (set == NULL)
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| 165 | return 0;
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| 166 |
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| 167 | for (i = 0; i < set->fd_count; i++)
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| 168 | if (set->fd_array[i] == fd)
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| 169 | return 1;
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| 170 |
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| 171 | return 0;
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| 172 | }
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| 173 |
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| 174 | # define GNULIB_defined_rpl_fd_isset 1
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| 175 | # endif
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| 176 |
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| 177 | # undef FD_ISSET
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| 178 | # define FD_ISSET(fd, set) rpl_fd_isset(fd, set)
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| 179 |
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| 180 | #endif
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| 181 |
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| 182 | /* Hide some function declarations from <winsock2.h>. */
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| 183 |
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| 184 | #if @HAVE_WINSOCK2_H@
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| 185 | # if !defined _@GUARD_PREFIX@_UNISTD_H
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| 186 | # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
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| 187 | # undef close
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| 188 | # define close close_used_without_including_unistd_h
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| 189 | # elif !defined __clang__
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| 190 | _GL_WARN_ON_USE (close,
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| 191 | "close() used without including <unistd.h>");
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| 192 | # endif
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| 193 | # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
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| 194 | # undef gethostname
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| 195 | # define gethostname gethostname_used_without_including_unistd_h
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| 196 | # elif !defined __clang__
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| 197 | _GL_WARN_ON_USE (gethostname,
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| 198 | "gethostname() used without including <unistd.h>");
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| 199 | # endif
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| 200 | # endif
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| 201 | # if !defined _@GUARD_PREFIX@_SYS_SOCKET_H
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| 202 | # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
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| 203 | # undef socket
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| 204 | # define socket socket_used_without_including_sys_socket_h
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| 205 | # undef connect
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| 206 | # define connect connect_used_without_including_sys_socket_h
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| 207 | # undef accept
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| 208 | # define accept accept_used_without_including_sys_socket_h
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| 209 | # undef bind
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| 210 | # define bind bind_used_without_including_sys_socket_h
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| 211 | # undef getpeername
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| 212 | # define getpeername getpeername_used_without_including_sys_socket_h
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| 213 | # undef getsockname
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| 214 | # define getsockname getsockname_used_without_including_sys_socket_h
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| 215 | # undef getsockopt
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| 216 | # define getsockopt getsockopt_used_without_including_sys_socket_h
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| 217 | # undef listen
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| 218 | # define listen listen_used_without_including_sys_socket_h
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| 219 | # undef recv
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| 220 | # define recv recv_used_without_including_sys_socket_h
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| 221 | # undef send
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| 222 | # define send send_used_without_including_sys_socket_h
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| 223 | # undef recvfrom
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| 224 | # define recvfrom recvfrom_used_without_including_sys_socket_h
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| 225 | # undef sendto
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| 226 | # define sendto sendto_used_without_including_sys_socket_h
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| 227 | # undef setsockopt
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| 228 | # define setsockopt setsockopt_used_without_including_sys_socket_h
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| 229 | # undef shutdown
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| 230 | # define shutdown shutdown_used_without_including_sys_socket_h
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| 231 | # elif !defined __clang__
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| 232 | _GL_WARN_ON_USE (socket,
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| 233 | "socket() used without including <sys/socket.h>");
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| 234 | _GL_WARN_ON_USE (connect,
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| 235 | "connect() used without including <sys/socket.h>");
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| 236 | _GL_WARN_ON_USE (accept,
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| 237 | "accept() used without including <sys/socket.h>");
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| 238 | _GL_WARN_ON_USE (bind,
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| 239 | "bind() used without including <sys/socket.h>");
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| 240 | _GL_WARN_ON_USE (getpeername,
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| 241 | "getpeername() used without including <sys/socket.h>");
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| 242 | _GL_WARN_ON_USE (getsockname,
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| 243 | "getsockname() used without including <sys/socket.h>");
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| 244 | _GL_WARN_ON_USE (getsockopt,
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| 245 | "getsockopt() used without including <sys/socket.h>");
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| 246 | _GL_WARN_ON_USE (listen,
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| 247 | "listen() used without including <sys/socket.h>");
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| 248 | _GL_WARN_ON_USE (recv,
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| 249 | "recv() used without including <sys/socket.h>");
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| 250 | _GL_WARN_ON_USE (send,
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| 251 | "send() used without including <sys/socket.h>");
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| 252 | _GL_WARN_ON_USE (recvfrom,
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| 253 | "recvfrom() used without including <sys/socket.h>");
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| 254 | _GL_WARN_ON_USE (sendto,
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| 255 | "sendto() used without including <sys/socket.h>");
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| 256 | _GL_WARN_ON_USE (setsockopt,
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| 257 | "setsockopt() used without including <sys/socket.h>");
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| 258 | _GL_WARN_ON_USE (shutdown,
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| 259 | "shutdown() used without including <sys/socket.h>");
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| 260 | # endif
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| 261 | # endif
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| 262 | #endif
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| 263 |
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| 264 |
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| 265 | #if @GNULIB_PSELECT@
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| 266 | # if @REPLACE_PSELECT@
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| 267 | # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
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| 268 | # undef pselect
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| 269 | # define pselect rpl_pselect
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| 270 | # endif
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| 271 | _GL_FUNCDECL_RPL (pselect, int,
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| 272 | (int, fd_set *restrict, fd_set *restrict, fd_set *restrict,
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| 273 | struct timespec const *restrict, const sigset_t *restrict));
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| 274 | _GL_CXXALIAS_RPL (pselect, int,
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| 275 | (int, fd_set *restrict, fd_set *restrict, fd_set *restrict,
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| 276 | struct timespec const *restrict, const sigset_t *restrict));
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| 277 | # else
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| 278 | # if !@HAVE_PSELECT@
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| 279 | _GL_FUNCDECL_SYS (pselect, int,
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| 280 | (int, fd_set *restrict, fd_set *restrict, fd_set *restrict,
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| 281 | struct timespec const *restrict, const sigset_t *restrict));
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| 282 | # endif
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| 283 | /* Need to cast, because on AIX 7, the second, third, fourth argument may be
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| 284 | void *restrict, void *restrict, void *restrict. */
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| 285 | _GL_CXXALIAS_SYS_CAST (pselect, int,
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| 286 | (int,
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| 287 | fd_set *restrict, fd_set *restrict, fd_set *restrict,
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| 288 | struct timespec const *restrict,
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| 289 | const sigset_t *restrict));
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| 290 | # endif
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| 291 | # if __GLIBC__ >= 2
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| 292 | _GL_CXXALIASWARN (pselect);
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| 293 | # endif
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| 294 | #elif defined GNULIB_POSIXCHECK
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| 295 | # undef pselect
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| 296 | # if HAVE_RAW_DECL_PSELECT
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| 297 | _GL_WARN_ON_USE (pselect, "pselect is not portable - "
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| 298 | "use gnulib module pselect for portability");
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| 299 | # endif
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| 300 | #endif
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| 301 |
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| 302 | #if @GNULIB_SELECT@
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| 303 | # if @REPLACE_SELECT@
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| 304 | # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
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| 305 | # undef select
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| 306 | # define select rpl_select
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| 307 | # endif
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| 308 | _GL_FUNCDECL_RPL (select, int,
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| 309 | (int, fd_set *restrict, fd_set *restrict, fd_set *restrict,
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| 310 | struct timeval *restrict));
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| 311 | _GL_CXXALIAS_RPL (select, int,
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| 312 | (int, fd_set *restrict, fd_set *restrict, fd_set *restrict,
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| 313 | timeval *restrict));
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| 314 | # else
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| 315 | _GL_CXXALIAS_SYS (select, int,
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| 316 | (int, fd_set *restrict, fd_set *restrict, fd_set *restrict,
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| 317 | timeval *restrict));
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| 318 | # endif
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| 319 | _GL_CXXALIASWARN (select);
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| 320 | #elif @HAVE_WINSOCK2_H@
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| 321 | # undef select
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| 322 | # define select select_used_without_requesting_gnulib_module_select
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| 323 | #elif defined GNULIB_POSIXCHECK
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| 324 | # undef select
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| 325 | # if HAVE_RAW_DECL_SELECT
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| 326 | _GL_WARN_ON_USE (select, "select is not always POSIX compliant - "
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| 327 | "use gnulib module select for portability");
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| 328 | # endif
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| 329 | #endif
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| 330 |
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| 331 |
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| 332 | #endif /* _@GUARD_PREFIX@_SYS_SELECT_H */
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| 333 | #endif /* _@GUARD_PREFIX@_SYS_SELECT_H */
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| 334 | #endif /* OSF/1 */
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