tests/lib/libc/sys/t_issetugid.c

   1 /* $NetBSD: t_issetugid.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_issetugid.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 <pwd.h>
  39 #include <stdlib.h>
  40 #include <unistd.h>
  41
  42 static bool check(int (*fuid)(uid_t), int (*fgid)(gid_t));
  43
  44 static bool
  45 check(int (*fuid)(uid_t), int (*fgid)(gid_t))
  46 {
  47         struct passwd *pw;
  48         pid_t pid;
  49         int sta;
  50
  51         pw = getpwnam("nobody");
  52
  53         if (pw == NULL)
  54                 return false;
  55
  56         pid = fork();
  57
  58         if (pid < 0)
  59                 return false;
  60
  61         if (pid == 0) {
  62
  63                 if (fuid != NULL && (*fuid)(pw->pw_uid) != 0)
  64                         _exit(EXIT_FAILURE);
  65
  66                 if (fgid != NULL && (*fgid)(pw->pw_gid) != 0)
  67                         _exit(EXIT_FAILURE);
  68
  69                 if (issetugid() != 1)
  70                         _exit(EXIT_FAILURE);
  71
  72                 _exit(EXIT_SUCCESS);
  73         }
  74
  75         (void)wait(&sta);
  76
  77         if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS)
  78                 return false;
  79
  80         return true;
  81 }
  82
  83 ATF_TC(issetugid_egid);
  84 ATF_TC_HEAD(issetugid_egid, tc)
  85 {
  86         atf_tc_set_md_var(tc, "descr", "A test of issetugid(2), eff. GID");
  87         atf_tc_set_md_var(tc, "require.user", "root");
  88 }
  89
  90 ATF_TC_BODY(issetugid_egid, tc)
  91 {
  92
  93         if (check(NULL, setegid) != true)
  94                 atf_tc_fail("issetugid(2) failed with effective GID");
  95 }
  96
  97 ATF_TC(issetugid_euid);
  98 ATF_TC_HEAD(issetugid_euid, tc)
  99 {
 100         atf_tc_set_md_var(tc, "descr", "A test of issetugid(2), eff. UID");
 101         atf_tc_set_md_var(tc, "require.user", "root");
 102 }
 103
 104 ATF_TC_BODY(issetugid_euid, tc)
 105 {
 106
 107         if (check(seteuid, NULL) != true)
 108                 atf_tc_fail("issetugid(2) failed with effective UID");
 109 }
 110
 111 ATF_TC(issetugid_rgid);
 112 ATF_TC_HEAD(issetugid_rgid, tc)
 113 {
 114         atf_tc_set_md_var(tc, "descr", "A test of issetugid(2), real GID");
 115         atf_tc_set_md_var(tc, "require.user", "root");
 116 }
 117
 118 ATF_TC_BODY(issetugid_rgid, tc)
 119 {
 120
 121         if (check(NULL, setgid) != true)
 122                 atf_tc_fail("issetugid(2) failed with real GID");
 123 }
 124
 125 ATF_TC(issetugid_ruid);
 126 ATF_TC_HEAD(issetugid_ruid, tc)
 127 {
 128         atf_tc_set_md_var(tc, "descr", "A test of issetugid(2), real UID");
 129         atf_tc_set_md_var(tc, "require.user", "root");
 130 }
 131
 132 ATF_TC_BODY(issetugid_ruid, tc)
 133 {
 134
 135         if (check(setuid, NULL) != true)
 136                 atf_tc_fail("issetugid(2) failed with real UID");
 137 }
 138
 139 ATF_TP_ADD_TCS(tp)
 140 {
 141
 142         ATF_TP_ADD_TC(tp, issetugid_egid);
 143         ATF_TP_ADD_TC(tp, issetugid_euid);
 144         ATF_TP_ADD_TC(tp, issetugid_rgid);
 145         ATF_TP_ADD_TC(tp, issetugid_ruid);
 146
 147         return atf_no_error();
 148 }