tests/lib/libc/sys/t_getgroups.c

   1 /* $NetBSD: t_getgroups.c,v 1.1 2011/07/07 06:57:53 jruoho Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2011 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Jukka Ruohonen.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31 #include <sys/cdefs.h>
  32 __RCSID("$NetBSD: t_getgroups.c,v 1.1 2011/07/07 06:57:53 jruoho Exp $");
  33
  34 #include <sys/wait.h>
  35
  36 #include <atf-c.h>
  37 #include <errno.h>
  38 #include <limits.h>
  39 #include <stdlib.h>
  40 #include <string.h>
  41 #include <unistd.h>
  42
  43 ATF_TC(getgroups_err);
  44 ATF_TC_HEAD(getgroups_err, tc)
  45 {
  46         atf_tc_set_md_var(tc, "descr", "Test errors in getgroups(2)");
  47 }
  48
  49 ATF_TC_BODY(getgroups_err, tc)
  50 {
  51         gid_t gidset[NGROUPS_MAX];
  52
  53         errno = 0;
  54
  55         ATF_REQUIRE(getgroups(10, (gid_t *)-1) == -1);
  56         ATF_REQUIRE(errno == EFAULT);
  57
  58         errno = 0;
  59
  60         ATF_REQUIRE(getgroups(-1, gidset) == -1);
  61         ATF_REQUIRE(errno == EINVAL);
  62 }
  63
  64 ATF_TC(getgroups_getgid);
  65 ATF_TC_HEAD(getgroups_getgid, tc)
  66 {
  67         atf_tc_set_md_var(tc, "descr", "Test getgid(2) from getgroups(2)");
  68 }
  69
  70 ATF_TC_BODY(getgroups_getgid, tc)
  71 {
  72         gid_t gidset[NGROUPS_MAX];
  73         gid_t gid = getgid();
  74         int i, n;
  75
  76         /*
  77          * Check that getgid(2) is found from
  78          * the GIDs returned by getgroups(2).
  79          */
  80         n = getgroups(NGROUPS_MAX, gidset);
  81
  82         for (i = 0; i < n; i++) {
  83
  84                 if (gidset[i] == gid)
  85                         return;
  86         }
  87
  88         atf_tc_fail("getgid(2) not found from getgroups(2)");
  89 }
  90
  91 ATF_TC(getgroups_setgid);
  92 ATF_TC_HEAD(getgroups_setgid, tc)
  93 {
  94         atf_tc_set_md_var(tc, "descr", "Test setgid(2) from getgroups(2)");
  95         atf_tc_set_md_var(tc, "require.user", "root");
  96 }
  97
  98 ATF_TC_BODY(getgroups_setgid, tc)
  99 {
 100         gid_t gidset[NGROUPS_MAX];
 101         int i, n, rv, sta;
 102         pid_t pid;
 103
 104         /*
 105          * Check that we can setgid(2)
 106          * to the returned group IDs.
 107          */
 108         n = getgroups(NGROUPS_MAX, gidset);
 109         ATF_REQUIRE(n >= 0);
 110
 111         for (i = 0; i < n; i++) {
 112
 113                 pid = fork();
 114                 ATF_REQUIRE(pid >= 0);
 115
 116                 if (pid == 0) {
 117
 118                         rv = setgid(gidset[i]);
 119
 120                         if (rv != 0)
 121                                 _exit(EXIT_FAILURE);
 122
 123                         _exit(EXIT_SUCCESS);
 124                 }
 125
 126                 (void)wait(&sta);
 127
 128                 if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS)
 129                         atf_tc_fail("getgroups(2) is inconsistent");
 130         }
 131 }
 132
 133 ATF_TC(getgroups_zero);
 134 ATF_TC_HEAD(getgroups_zero, tc)
 135 {
 136         atf_tc_set_md_var(tc, "descr", "Test getgroups(2) with zero param");
 137 }
 138
 139 ATF_TC_BODY(getgroups_zero, tc)
 140 {
 141         const gid_t val = 123456789;
 142         gid_t gidset[NGROUPS_MAX];
 143         size_t i;
 144
 145         /*
 146          * If the first parameter is zero, the number
 147          * of groups should be returned but the supplied
 148          * buffer should remain intact.
 149          */
 150         for (i = 0; i < __arraycount(gidset); i++)
 151                 gidset[i] = val;
 152
 153         ATF_REQUIRE(getgroups(0, gidset) >= 0);
 154
 155         for (i = 0; i < __arraycount(gidset); i++) {
 156
 157                 if (gidset[i] != val)
 158                         atf_tc_fail("getgroups(2) modified the buffer");
 159         }
 160 }
 161
 162 ATF_TP_ADD_TCS(tp)
 163 {
 164
 165         ATF_TP_ADD_TC(tp, getgroups_err);
 166         ATF_TP_ADD_TC(tp, getgroups_getgid);
 167         ATF_TP_ADD_TC(tp, getgroups_setgid);
 168         ATF_TP_ADD_TC(tp, getgroups_zero);
 169
 170         return atf_no_error();
 171 }