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73dcdb9f PE |
1 | # serial 18 |
2 | ||
3 | dnl From Jim Meyering. | |
4 | dnl A wrapper around AC_FUNC_GETGROUPS. | |
5 | ||
9ff99d22 | 6 | # Copyright (C) 1996-1997, 1999-2004, 2008-2013 Free Software Foundation, Inc. |
73dcdb9f PE |
7 | # |
8 | # This file is free software; the Free Software Foundation | |
9 | # gives unlimited permission to copy and/or distribute it, | |
10 | # with or without modifications, as long as this notice is preserved. | |
11 | ||
12 | m4_version_prereq([2.70], [] ,[ | |
13 | ||
14 | # This is taken from the following Autoconf patch: | |
15 | # http://git.savannah.gnu.org/gitweb/?p=autoconf.git;a=commitdiff;h=7fbb553727ed7e0e689a17594b58559ecf3ea6e9 | |
16 | AC_DEFUN([AC_FUNC_GETGROUPS], | |
17 | [ | |
18 | AC_REQUIRE([AC_TYPE_GETGROUPS])dnl | |
19 | AC_REQUIRE([AC_TYPE_SIZE_T])dnl | |
20 | AC_REQUIRE([AC_CANONICAL_HOST])dnl for cross-compiles | |
21 | AC_CHECK_FUNC([getgroups]) | |
22 | ||
23 | # If we don't yet have getgroups, see if it's in -lbsd. | |
24 | # This is reported to be necessary on an ITOS 3000WS running SEIUX 3.1. | |
25 | ac_save_LIBS=$LIBS | |
26 | if test $ac_cv_func_getgroups = no; then | |
27 | AC_CHECK_LIB(bsd, getgroups, [GETGROUPS_LIB=-lbsd]) | |
28 | fi | |
29 | ||
30 | # Run the program to test the functionality of the system-supplied | |
31 | # getgroups function only if there is such a function. | |
32 | if test $ac_cv_func_getgroups = yes; then | |
33 | AC_CACHE_CHECK([for working getgroups], [ac_cv_func_getgroups_works], | |
34 | [AC_RUN_IFELSE( | |
35 | [AC_LANG_PROGRAM( | |
36 | [AC_INCLUDES_DEFAULT], | |
37 | [[/* On Ultrix 4.3, getgroups (0, 0) always fails. */ | |
38 | return getgroups (0, 0) == -1;]]) | |
39 | ], | |
40 | [ac_cv_func_getgroups_works=yes], | |
41 | [ac_cv_func_getgroups_works=no], | |
42 | [case "$host_os" in # (( | |
43 | # Guess yes on glibc systems. | |
44 | *-gnu*) ac_cv_func_getgroups_works="guessing yes" ;; | |
45 | # If we don't know, assume the worst. | |
46 | *) ac_cv_func_getgroups_works="guessing no" ;; | |
47 | esac | |
48 | ]) | |
49 | ]) | |
50 | else | |
51 | ac_cv_func_getgroups_works=no | |
52 | fi | |
53 | case "$ac_cv_func_getgroups_works" in | |
54 | *yes) | |
55 | AC_DEFINE([HAVE_GETGROUPS], [1], | |
56 | [Define to 1 if your system has a working `getgroups' function.]) | |
57 | ;; | |
58 | esac | |
59 | LIBS=$ac_save_LIBS | |
60 | ])# AC_FUNC_GETGROUPS | |
61 | ||
62 | ]) | |
63 | ||
64 | AC_DEFUN([gl_FUNC_GETGROUPS], | |
65 | [ | |
66 | AC_REQUIRE([AC_TYPE_GETGROUPS]) | |
67 | AC_REQUIRE([gl_UNISTD_H_DEFAULTS]) | |
68 | AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles | |
69 | ||
70 | AC_FUNC_GETGROUPS | |
71 | if test $ac_cv_func_getgroups != yes; then | |
72 | HAVE_GETGROUPS=0 | |
73 | else | |
74 | if test "$ac_cv_type_getgroups" != gid_t \ | |
75 | || { case "$ac_cv_func_getgroups_works" in | |
76 | *yes) false;; | |
77 | *) true;; | |
78 | esac | |
79 | }; then | |
80 | REPLACE_GETGROUPS=1 | |
81 | AC_DEFINE([GETGROUPS_ZERO_BUG], [1], [Define this to 1 if | |
82 | getgroups(0,NULL) does not return the number of groups.]) | |
83 | else | |
84 | dnl Detect FreeBSD bug; POSIX requires getgroups(-1,ptr) to fail. | |
85 | AC_CACHE_CHECK([whether getgroups handles negative values], | |
86 | [gl_cv_func_getgroups_works], | |
87 | [AC_RUN_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT], | |
88 | [[int size = getgroups (0, 0); | |
89 | gid_t *list = malloc (size * sizeof *list); | |
90 | return getgroups (-1, list) != -1;]])], | |
91 | [gl_cv_func_getgroups_works=yes], | |
92 | [gl_cv_func_getgroups_works=no], | |
93 | [case "$host_os" in | |
94 | # Guess yes on glibc systems. | |
95 | *-gnu*) gl_cv_func_getgroups_works="guessing yes" ;; | |
96 | # If we don't know, assume the worst. | |
97 | *) gl_cv_func_getgroups_works="guessing no" ;; | |
98 | esac | |
99 | ])]) | |
100 | case "$gl_cv_func_getgroups_works" in | |
101 | *yes) ;; | |
102 | *) REPLACE_GETGROUPS=1 ;; | |
103 | esac | |
104 | fi | |
105 | fi | |
106 | test -n "$GETGROUPS_LIB" && LIBS="$GETGROUPS_LIB $LIBS" | |
107 | ]) |