summaryrefslogtreecommitdiffstats
path: root/m4/unistd_h.m4
blob: e078bd617a7b4f0da98071f93f048e4e2ac7e82a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
# unistd_h.m4 serial 95
dnl Copyright (C) 2006-2024 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.

dnl Written by Simon Josefsson, Bruno Haible.

AC_DEFUN_ONCE([gl_UNISTD_H],
[
  dnl Ensure to expand the default settings once only, before all statements
  dnl that occur in other macros.
  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])

  gl_CHECK_NEXT_HEADERS([unistd.h])
  if test $ac_cv_header_unistd_h = yes; then
    HAVE_UNISTD_H=1
  else
    HAVE_UNISTD_H=0
  fi
  AC_SUBST([HAVE_UNISTD_H])

  dnl Ensure the type pid_t gets defined.
  AC_REQUIRE([AC_TYPE_PID_T])

  dnl Determine WINDOWS_64_BIT_OFF_T.
  AC_REQUIRE([gl_TYPE_OFF_T])

  dnl Check for declarations of anything we want to poison if the
  dnl corresponding gnulib module is not in use.
  gl_WARN_ON_USE_PREPARE([[
#if HAVE_UNISTD_H
# include <unistd.h>
#endif
/* Some systems declare various items in the wrong headers.  */
#if !(defined __GLIBC__ && !defined __UCLIBC__)
# include <fcntl.h>
# include <stdio.h>
# include <stdlib.h>
# if defined _WIN32 && ! defined __CYGWIN__
#  include <io.h>
# endif
#endif
    ]], [access chdir chown copy_file_range dup dup2 dup3 environ euidaccess
    execl execle execlp execv execve execvp execvpe
    faccessat fchdir
    fchownat fdatasync fsync ftruncate getcwd getdomainname getdtablesize
    getentropy getgroups gethostname getlogin getlogin_r getpagesize getpass
    getusershell setusershell endusershell
    group_member isatty lchown link linkat lseek pipe pipe2 pread pwrite
    readlink readlinkat rmdir sethostname sleep symlink symlinkat
    truncate ttyname_r unlink unlinkat usleep])

  AC_REQUIRE([AC_C_RESTRICT])

  AC_CHECK_DECLS_ONCE([execvpe])
  if test $ac_cv_have_decl_execvpe = no; then
    HAVE_DECL_EXECVPE=0
  fi
])

# gl_UNISTD_MODULE_INDICATOR([modulename])
# sets the shell variable that indicates the presence of the given module
# to a C preprocessor expression that will evaluate to 1.
# This macro invocation must not occur in macros that are AC_REQUIREd.
AC_DEFUN([gl_UNISTD_MODULE_INDICATOR],
[
  dnl Ensure to expand the default settings once only.
  gl_UNISTD_H_REQUIRE_DEFAULTS
  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
  dnl Define it also as a C macro, for the benefit of the unit tests.
  gl_MODULE_INDICATOR_FOR_TESTS([$1])
])

# Initializes the default values for AC_SUBSTed shell variables.
# This macro must not be AC_REQUIREd.  It must only be invoked, and only
# outside of macros or in macros that are not AC_REQUIREd.
AC_DEFUN([gl_UNISTD_H_REQUIRE_DEFAULTS],
[
  m4_defun(GL_MODULE_INDICATOR_PREFIX[_UNISTD_H_MODULE_INDICATOR_DEFAULTS], [
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ACCESS])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_CHDIR])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_CHOWN])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_CLOSE])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_COPY_FILE_RANGE])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_DUP])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_DUP2])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_DUP3])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ENVIRON])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_EUIDACCESS])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_EXECL])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_EXECLE])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_EXECLP])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_EXECV])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_EXECVE])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_EXECVP])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_EXECVPE])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FACCESSAT])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FCHDIR])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FCHOWNAT])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FDATASYNC])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FSYNC])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FTRUNCATE])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETCWD])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETDOMAINNAME])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETDTABLESIZE])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETENTROPY])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETGROUPS])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETHOSTNAME])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETLOGIN])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETLOGIN_R])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETOPT_POSIX])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETPAGESIZE])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETPASS])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETPASS_GNU])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETUSERSHELL])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GROUP_MEMBER])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ISATTY])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_LCHOWN])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_LINK])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_LINKAT])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_LSEEK])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_PIPE])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_PIPE2])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_PREAD])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_PWRITE])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_READ])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_READLINK])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_READLINKAT])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_RMDIR])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SETHOSTNAME])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SLEEP])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SYMLINK])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SYMLINKAT])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_TRUNCATE])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_TTYNAME_R])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_UNISTD_H_GETOPT])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_UNISTD_H_NONBLOCKING])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_UNISTD_H_SIGPIPE])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_UNLINK])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_UNLINKAT])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_USLEEP])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WRITE])
    dnl Support Microsoft deprecated alias function names by default.
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_ACCESS], [1])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_CHDIR], [1])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_CLOSE], [1])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_DUP], [1])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_DUP2], [1])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_EXECL], [1])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_EXECLE], [1])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_EXECLP], [1])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_EXECV], [1])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_EXECVE], [1])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_EXECVP], [1])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_EXECVPE], [1])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_GETCWD], [1])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_GETPID], [1])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_ISATTY], [1])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_LSEEK], [1])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_READ], [1])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_RMDIR], [1])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_SWAB], [1])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_UNLINK], [1])
    gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_WRITE], [1])
  ])
  m4_require(GL_MODULE_INDICATOR_PREFIX[_UNISTD_H_MODULE_INDICATOR_DEFAULTS])
  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
])

AC_DEFUN([gl_UNISTD_H_DEFAULTS],
[
  dnl Assume proper GNU behavior unless another module says otherwise.
  HAVE_CHOWN=1;                      AC_SUBST([HAVE_CHOWN])
  HAVE_COPY_FILE_RANGE=1;            AC_SUBST([HAVE_COPY_FILE_RANGE])
  HAVE_DUP3=1;                       AC_SUBST([HAVE_DUP3])
  HAVE_EUIDACCESS=1;                 AC_SUBST([HAVE_EUIDACCESS])
  HAVE_EXECVPE=1;                    AC_SUBST([HAVE_EXECVPE])
  HAVE_FACCESSAT=1;                  AC_SUBST([HAVE_FACCESSAT])
  HAVE_FCHDIR=1;                     AC_SUBST([HAVE_FCHDIR])
  HAVE_FCHOWNAT=1;                   AC_SUBST([HAVE_FCHOWNAT])
  HAVE_FDATASYNC=1;                  AC_SUBST([HAVE_FDATASYNC])
  HAVE_FSYNC=1;                      AC_SUBST([HAVE_FSYNC])
  HAVE_FTRUNCATE=1;                  AC_SUBST([HAVE_FTRUNCATE])
  HAVE_GETDTABLESIZE=1;              AC_SUBST([HAVE_GETDTABLESIZE])
  HAVE_GETENTROPY=1;                 AC_SUBST([HAVE_GETENTROPY])
  HAVE_GETGROUPS=1;                  AC_SUBST([HAVE_GETGROUPS])
  HAVE_GETHOSTNAME=1;                AC_SUBST([HAVE_GETHOSTNAME])
  HAVE_GETLOGIN=1;                   AC_SUBST([HAVE_GETLOGIN])
  HAVE_GETPAGESIZE=1;                AC_SUBST([HAVE_GETPAGESIZE])
  HAVE_GETPASS=1;                    AC_SUBST([HAVE_GETPASS])
  HAVE_GROUP_MEMBER=1;               AC_SUBST([HAVE_GROUP_MEMBER])
  HAVE_LCHOWN=1;                     AC_SUBST([HAVE_LCHOWN])
  HAVE_LINK=1;                       AC_SUBST([HAVE_LINK])
  HAVE_LINKAT=1;                     AC_SUBST([HAVE_LINKAT])
  HAVE_PIPE=1;                       AC_SUBST([HAVE_PIPE])
  HAVE_PIPE2=1;                      AC_SUBST([HAVE_PIPE2])
  HAVE_PREAD=1;                      AC_SUBST([HAVE_PREAD])
  HAVE_PWRITE=1;                     AC_SUBST([HAVE_PWRITE])
  HAVE_READLINK=1;                   AC_SUBST([HAVE_READLINK])
  HAVE_READLINKAT=1;                 AC_SUBST([HAVE_READLINKAT])
  HAVE_SETHOSTNAME=1;                AC_SUBST([HAVE_SETHOSTNAME])
  HAVE_SLEEP=1;                      AC_SUBST([HAVE_SLEEP])
  HAVE_SYMLINK=1;                    AC_SUBST([HAVE_SYMLINK])
  HAVE_SYMLINKAT=1;                  AC_SUBST([HAVE_SYMLINKAT])
  HAVE_UNLINKAT=1;                   AC_SUBST([HAVE_UNLINKAT])
  HAVE_USLEEP=1;                     AC_SUBST([HAVE_USLEEP])
  HAVE_DECL_ENVIRON=1;               AC_SUBST([HAVE_DECL_ENVIRON])
  HAVE_DECL_EXECVPE=1;               AC_SUBST([HAVE_DECL_EXECVPE])
  HAVE_DECL_FCHDIR=1;                AC_SUBST([HAVE_DECL_FCHDIR])
  HAVE_DECL_FDATASYNC=1;             AC_SUBST([HAVE_DECL_FDATASYNC])
  HAVE_DECL_GETDOMAINNAME=1;         AC_SUBST([HAVE_DECL_GETDOMAINNAME])
  HAVE_DECL_GETLOGIN=1;              AC_SUBST([HAVE_DECL_GETLOGIN])
  HAVE_DECL_GETLOGIN_R=1;            AC_SUBST([HAVE_DECL_GETLOGIN_R])
  HAVE_DECL_GETPAGESIZE=1;           AC_SUBST([HAVE_DECL_GETPAGESIZE])
  HAVE_DECL_GETUSERSHELL=1;          AC_SUBST([HAVE_DECL_GETUSERSHELL])
  HAVE_DECL_SETHOSTNAME=1;           AC_SUBST([HAVE_DECL_SETHOSTNAME])
  HAVE_DECL_TRUNCATE=1;              AC_SUBST([HAVE_DECL_TRUNCATE])
  HAVE_DECL_TTYNAME_R=1;             AC_SUBST([HAVE_DECL_TTYNAME_R])
  HAVE_OS_H=0;                       AC_SUBST([HAVE_OS_H])
  HAVE_SYS_PARAM_H=0;                AC_SUBST([HAVE_SYS_PARAM_H])
  REPLACE_ACCESS=0;                  AC_SUBST([REPLACE_ACCESS])
  REPLACE_CHOWN=0;                   AC_SUBST([REPLACE_CHOWN])
  REPLACE_CLOSE=0;                   AC_SUBST([REPLACE_CLOSE])
  REPLACE_COPY_FILE_RANGE=0;         AC_SUBST([REPLACE_COPY_FILE_RANGE])
  REPLACE_DUP=0;                     AC_SUBST([REPLACE_DUP])
  REPLACE_DUP2=0;                    AC_SUBST([REPLACE_DUP2])
  REPLACE_DUP3=0;                    AC_SUBST([REPLACE_DUP3])
  REPLACE_EXECL=0;                   AC_SUBST([REPLACE_EXECL])
  REPLACE_EXECLE=0;                  AC_SUBST([REPLACE_EXECLE])
  REPLACE_EXECLP=0;                  AC_SUBST([REPLACE_EXECLP])
  REPLACE_EXECV=0;                   AC_SUBST([REPLACE_EXECV])
  REPLACE_EXECVE=0;                  AC_SUBST([REPLACE_EXECVE])
  REPLACE_EXECVP=0;                  AC_SUBST([REPLACE_EXECVP])
  REPLACE_EXECVPE=0;                 AC_SUBST([REPLACE_EXECVPE])
  REPLACE_FACCESSAT=0;               AC_SUBST([REPLACE_FACCESSAT])
  REPLACE_FCHDIR=0;                  AC_SUBST([REPLACE_FCHDIR])
  REPLACE_FCHOWNAT=0;                AC_SUBST([REPLACE_FCHOWNAT])
  REPLACE_FDATASYNC=0;               AC_SUBST([REPLACE_FDATASYNC])
  REPLACE_FTRUNCATE=0;               AC_SUBST([REPLACE_FTRUNCATE])
  REPLACE_GETCWD=0;                  AC_SUBST([REPLACE_GETCWD])
  REPLACE_GETDOMAINNAME=0;           AC_SUBST([REPLACE_GETDOMAINNAME])
  REPLACE_GETDTABLESIZE=0;           AC_SUBST([REPLACE_GETDTABLESIZE])
  REPLACE_GETENTROPY=0;              AC_SUBST([REPLACE_GETENTROPY])
  REPLACE_GETLOGIN_R=0;              AC_SUBST([REPLACE_GETLOGIN_R])
  REPLACE_GETGROUPS=0;               AC_SUBST([REPLACE_GETGROUPS])
  REPLACE_GETPAGESIZE=0;             AC_SUBST([REPLACE_GETPAGESIZE])
  REPLACE_GETPASS=0;                 AC_SUBST([REPLACE_GETPASS])
  REPLACE_GETPASS_FOR_GETPASS_GNU=0; AC_SUBST([REPLACE_GETPASS_FOR_GETPASS_GNU])
  REPLACE_ISATTY=0;                  AC_SUBST([REPLACE_ISATTY])
  REPLACE_LCHOWN=0;                  AC_SUBST([REPLACE_LCHOWN])
  REPLACE_LINK=0;                    AC_SUBST([REPLACE_LINK])
  REPLACE_LINKAT=0;                  AC_SUBST([REPLACE_LINKAT])
  REPLACE_LSEEK=0;                   AC_SUBST([REPLACE_LSEEK])
  REPLACE_PIPE2=0;                   AC_SUBST([REPLACE_PIPE2])
  REPLACE_PREAD=0;                   AC_SUBST([REPLACE_PREAD])
  REPLACE_PWRITE=0;                  AC_SUBST([REPLACE_PWRITE])
  REPLACE_READ=0;                    AC_SUBST([REPLACE_READ])
  REPLACE_READLINK=0;                AC_SUBST([REPLACE_READLINK])
  REPLACE_READLINKAT=0;              AC_SUBST([REPLACE_READLINKAT])
  REPLACE_RMDIR=0;                   AC_SUBST([REPLACE_RMDIR])
  REPLACE_SETHOSTNAME=0;             AC_SUBST([REPLACE_SETHOSTNAME])
  REPLACE_SLEEP=0;                   AC_SUBST([REPLACE_SLEEP])
  REPLACE_SYMLINK=0;                 AC_SUBST([REPLACE_SYMLINK])
  REPLACE_SYMLINKAT=0;               AC_SUBST([REPLACE_SYMLINKAT])
  REPLACE_TRUNCATE=0;                AC_SUBST([REPLACE_TRUNCATE])
  REPLACE_TTYNAME_R=0;               AC_SUBST([REPLACE_TTYNAME_R])
  REPLACE_UNLINK=0;                  AC_SUBST([REPLACE_UNLINK])
  REPLACE_UNLINKAT=0;                AC_SUBST([REPLACE_UNLINKAT])
  REPLACE_USLEEP=0;                  AC_SUBST([REPLACE_USLEEP])
  REPLACE_WRITE=0;                   AC_SUBST([REPLACE_WRITE])
  UNISTD_H_HAVE_SYS_RANDOM_H=0;      AC_SUBST([UNISTD_H_HAVE_SYS_RANDOM_H])
  UNISTD_H_HAVE_WINSOCK2_H=0;        AC_SUBST([UNISTD_H_HAVE_WINSOCK2_H])
  UNISTD_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS=0;
                           AC_SUBST([UNISTD_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS])
])