110 lines
4.0 KiB
Plaintext
110 lines
4.0 KiB
Plaintext
# getgroups.m4
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# serial 25
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dnl Copyright (C) 1996-1997, 1999-2004, 2008-2024 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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dnl From Jim Meyering.
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dnl A wrapper around AC_FUNC_GETGROUPS.
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# This is taken from the following Autoconf patch:
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# https://git.savannah.gnu.org/gitweb/?p=autoconf.git;a=commitdiff;h=7fbb553727ed7e0e689a17594b58559ecf3ea6e9
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AC_DEFUN([AC_FUNC_GETGROUPS],
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[
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AC_REQUIRE([AC_TYPE_GETGROUPS])dnl
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AC_REQUIRE([AC_TYPE_SIZE_T])dnl
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AC_REQUIRE([AC_CANONICAL_HOST])dnl for cross-compiles
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AC_CHECK_FUNC([getgroups])
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# If we don't yet have getgroups, see if it's in -lbsd.
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# This is reported to be necessary on an ITOS 3000WS running SEIUX 3.1.
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gl_saved_LIBS=$LIBS
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if test $ac_cv_func_getgroups = no; then
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AC_CHECK_LIB(bsd, getgroups, [GETGROUPS_LIB=-lbsd])
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fi
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# Run the program to test the functionality of the system-supplied
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# getgroups function only if there is such a function.
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if test $ac_cv_func_getgroups = yes; then
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AC_CACHE_CHECK([for working getgroups], [ac_cv_func_getgroups_works],
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[AC_RUN_IFELSE(
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[AC_LANG_PROGRAM(
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[AC_INCLUDES_DEFAULT],
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[[/* On NeXTstep 3.2, getgroups (0, 0) always fails. */
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return getgroups (0, 0) == -1;]])
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],
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[ac_cv_func_getgroups_works=yes],
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[ac_cv_func_getgroups_works=no],
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[case "$host_os" in # ((
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# Guess yes on glibc systems.
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*-gnu* | gnu*) ac_cv_func_getgroups_works="guessing yes" ;;
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# Guess yes on musl systems.
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*-musl*) ac_cv_func_getgroups_works="guessing yes" ;;
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# If we don't know, obey --enable-cross-guesses.
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*) ac_cv_func_getgroups_works="$gl_cross_guess_normal" ;;
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esac
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])
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])
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else
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ac_cv_func_getgroups_works=no
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fi
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case "$ac_cv_func_getgroups_works" in
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*yes)
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AC_DEFINE([HAVE_GETGROUPS], [1],
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[Define to 1 if your system has a working `getgroups' function.])
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;;
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esac
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LIBS=$gl_saved_LIBS
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])# AC_FUNC_GETGROUPS
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AC_DEFUN([gl_FUNC_GETGROUPS],
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[
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AC_REQUIRE([AC_TYPE_GETGROUPS])
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AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
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AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
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AC_FUNC_GETGROUPS
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if test $ac_cv_func_getgroups != yes; then
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HAVE_GETGROUPS=0
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else
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if test "$ac_cv_type_getgroups" != gid_t \
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|| { case "$ac_cv_func_getgroups_works" in
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*yes) false;;
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*) true;;
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esac
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}; then
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REPLACE_GETGROUPS=1
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AC_DEFINE([GETGROUPS_ZERO_BUG], [1], [Define this to 1 if
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getgroups(0,NULL) does not return the number of groups.])
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else
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dnl Detect Mac OS X and FreeBSD bug; POSIX requires getgroups(-1,ptr)
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dnl to fail.
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AC_CACHE_CHECK([whether getgroups handles negative values],
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[gl_cv_func_getgroups_works],
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[AC_RUN_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
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[[int size = getgroups (0, 0);
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gid_t *list = malloc (size * sizeof *list);
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int result = getgroups (-1, list) != -1;
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free (list);
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return result;]])],
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[gl_cv_func_getgroups_works=yes],
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[gl_cv_func_getgroups_works=no],
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[case "$host_os" in
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# Guess yes on glibc systems.
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*-gnu* | gnu*) gl_cv_func_getgroups_works="guessing yes" ;;
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# Guess yes on musl systems.
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*-musl*) gl_cv_func_getgroups_works="guessing yes" ;;
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# If we don't know, obey --enable-cross-guesses.
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*) gl_cv_func_getgroups_works="$gl_cross_guess_normal" ;;
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esac
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])])
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case "$gl_cv_func_getgroups_works" in
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*yes) ;;
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*) REPLACE_GETGROUPS=1 ;;
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esac
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fi
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fi
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test -n "$GETGROUPS_LIB" && LIBS="$GETGROUPS_LIB $LIBS"
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])
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