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# serial 20
dnl From Jim Meyering.
dnl A wrapper around AC_FUNC_GETGROUPS.
# Copyright (C) 1996-1997, 1999-2004, 2008-2018 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.
m4_version_prereq([2.70], [] ,[
# This is taken from the following Autoconf patch:
# https://git.savannah.gnu.org/gitweb/?p=autoconf.git;a=commitdiff;h=7fbb553727ed7e0e689a17594b58559ecf3ea6e9
AC_DEFUN([AC_FUNC_GETGROUPS],
[
AC_REQUIRE([AC_TYPE_GETGROUPS])dnl
AC_REQUIRE([AC_TYPE_SIZE_T])dnl
AC_REQUIRE([AC_CANONICAL_HOST])dnl for cross-compiles
AC_CHECK_FUNC([getgroups])
# If we don't yet have getgroups, see if it's in -lbsd.
# This is reported to be necessary on an ITOS 3000WS running SEIUX 3.1.
ac_save_LIBS=$LIBS
if test $ac_cv_func_getgroups = no; then
AC_CHECK_LIB(bsd, getgroups, [GETGROUPS_LIB=-lbsd])
fi
# Run the program to test the functionality of the system-supplied
# getgroups function only if there is such a function.
if test $ac_cv_func_getgroups = yes; then
AC_CACHE_CHECK([for working getgroups], [ac_cv_func_getgroups_works],
[AC_RUN_IFELSE(
[AC_LANG_PROGRAM(
[AC_INCLUDES_DEFAULT],
[[/* On Ultrix 4.3, getgroups (0, 0) always fails. */
return getgroups (0, 0) == -1;]])
],
[ac_cv_func_getgroups_works=yes],
[ac_cv_func_getgroups_works=no],
[case "$host_os" in # ((
# Guess yes on glibc systems.
*-gnu* | gnu*) ac_cv_func_getgroups_works="guessing yes" ;;
# If we don't know, assume the worst.
*) ac_cv_func_getgroups_works="guessing no" ;;
esac
])
])
else
ac_cv_func_getgroups_works=no
fi
case "$ac_cv_func_getgroups_works" in
*yes)
AC_DEFINE([HAVE_GETGROUPS], [1],
[Define to 1 if your system has a working `getgroups' function.])
;;
esac
LIBS=$ac_save_LIBS
])# AC_FUNC_GETGROUPS
])
AC_DEFUN([gl_FUNC_GETGROUPS],
[
AC_REQUIRE([AC_TYPE_GETGROUPS])
AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_FUNC_GETGROUPS
if test $ac_cv_func_getgroups != yes; then
HAVE_GETGROUPS=0
else
if test "$ac_cv_type_getgroups" != gid_t \
|| { case "$ac_cv_func_getgroups_works" in
*yes) false;;
*) true;;
esac
}; then
REPLACE_GETGROUPS=1
AC_DEFINE([GETGROUPS_ZERO_BUG], [1], [Define this to 1 if
getgroups(0,NULL) does not return the number of groups.])
else
dnl Detect FreeBSD bug; POSIX requires getgroups(-1,ptr) to fail.
AC_CACHE_CHECK([whether getgroups handles negative values],
[gl_cv_func_getgroups_works],
[AC_RUN_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
[[int size = getgroups (0, 0);
gid_t *list = malloc (size * sizeof *list);
int result = getgroups (-1, list) != -1;
free (list);
return result;]])],
[gl_cv_func_getgroups_works=yes],
[gl_cv_func_getgroups_works=no],
[case "$host_os" in
# Guess yes on glibc systems.
*-gnu* | gnu*) gl_cv_func_getgroups_works="guessing yes" ;;
# If we don't know, assume the worst.
*) gl_cv_func_getgroups_works="guessing no" ;;
esac
])])
case "$gl_cv_func_getgroups_works" in
*yes) ;;
*) REPLACE_GETGROUPS=1 ;;
esac
fi
fi
test -n "$GETGROUPS_LIB" && LIBS="$GETGROUPS_LIB $LIBS"
])
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