3 dnl Copyright (C) 1996-1997, 1999-2004, 2008-2024 Free Software Foundation, Inc.
4 dnl This file is free software; the Free Software Foundation
5 dnl gives unlimited permission to copy and/or distribute it,
6 dnl with or without modifications, as long as this notice is preserved.
9 dnl A wrapper around AC_FUNC_GETGROUPS.
11 # This is taken from the following Autoconf patch:
12 # https://git.savannah.gnu.org/gitweb/?p=autoconf.git;a=commitdiff;h=7fbb553727ed7e0e689a17594b58559ecf3ea6e9
13 AC_DEFUN([AC_FUNC_GETGROUPS],
15 AC_REQUIRE([AC_TYPE_GETGROUPS])dnl
16 AC_REQUIRE([AC_TYPE_SIZE_T])dnl
17 AC_REQUIRE([AC_CANONICAL_HOST])dnl for cross-compiles
18 AC_CHECK_FUNC([getgroups])
20 # If we don't yet have getgroups, see if it's in -lbsd.
21 # This is reported to be necessary on an ITOS 3000WS running SEIUX 3.1.
23 if test $ac_cv_func_getgroups = no; then
24 AC_CHECK_LIB(bsd, getgroups, [GETGROUPS_LIB=-lbsd])
27 # Run the program to test the functionality of the system-supplied
28 # getgroups function only if there is such a function.
29 if test $ac_cv_func_getgroups = yes; then
30 AC_CACHE_CHECK([for working getgroups], [ac_cv_func_getgroups_works],
33 [AC_INCLUDES_DEFAULT],
34 [[/* On NeXTstep 3.2, getgroups (0, 0) always fails. */
35 return getgroups (0, 0) == -1;]])
37 [ac_cv_func_getgroups_works=yes],
38 [ac_cv_func_getgroups_works=no],
39 [case "$host_os" in # ((
40 # Guess yes on glibc systems.
41 *-gnu* | gnu*) ac_cv_func_getgroups_works="guessing yes" ;;
42 # Guess yes on musl systems.
43 *-musl*) ac_cv_func_getgroups_works="guessing yes" ;;
44 # If we don't know, obey --enable-cross-guesses.
45 *) ac_cv_func_getgroups_works="$gl_cross_guess_normal" ;;
50 ac_cv_func_getgroups_works=no
52 case "$ac_cv_func_getgroups_works" in
54 AC_DEFINE([HAVE_GETGROUPS], [1],
55 [Define to 1 if your system has a working `getgroups' function.])
61 AC_DEFUN([gl_FUNC_GETGROUPS],
63 AC_REQUIRE([AC_TYPE_GETGROUPS])
64 AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
65 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
68 if test $ac_cv_func_getgroups != yes; then
71 if test "$ac_cv_type_getgroups" != gid_t \
72 || { case "$ac_cv_func_getgroups_works" in
78 AC_DEFINE([GETGROUPS_ZERO_BUG], [1], [Define this to 1 if
79 getgroups(0,NULL) does not return the number of groups.])
81 dnl Detect Mac OS X and FreeBSD bug; POSIX requires getgroups(-1,ptr)
83 AC_CACHE_CHECK([whether getgroups handles negative values],
84 [gl_cv_func_getgroups_works],
85 [AC_RUN_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
86 [[int size = getgroups (0, 0);
87 gid_t *list = malloc (size * sizeof *list);
88 int result = getgroups (-1, list) != -1;
91 [gl_cv_func_getgroups_works=yes],
92 [gl_cv_func_getgroups_works=no],
94 # Guess yes on glibc systems.
95 *-gnu* | gnu*) gl_cv_func_getgroups_works="guessing yes" ;;
96 # Guess yes on musl systems.
97 *-musl*) gl_cv_func_getgroups_works="guessing yes" ;;
98 # If we don't know, obey --enable-cross-guesses.
99 *) gl_cv_func_getgroups_works="$gl_cross_guess_normal" ;;
102 case "$gl_cv_func_getgroups_works" in
104 *) REPLACE_GETGROUPS=1 ;;
108 test -n "$GETGROUPS_LIB" && LIBS="$GETGROUPS_LIB $LIBS"