text: /* $NetBSD: t_issetugid.c,v 1.1 2011/07/07 06:57:53 jruoho Exp $ */
  
  /*-
   * Copyright (c) 2011 The NetBSD Foundation, Inc.
   * All rights reserved.
   *
   * This code is derived from software contributed to The NetBSD Foundation
   * by Jukka Ruohonen.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   */
  #include <sys/cdefs.h>
  __RCSID("$NetBSD: t_issetugid.c,v 1.1 2011/07/07 06:57:53 jruoho Exp $");
  
  #include <sys/wait.h>
  
  #include <atf-c.h>
  #include <errno.h>
  #include <pwd.h>
  #include <stdlib.h>
  #include <unistd.h>
  
  static bool check(int (*fuid)(uid_t), int (*fgid)(gid_t));
  
  static bool
  check(int (*fuid)(uid_t), int (*fgid)(gid_t))
  {
  	struct passwd *pw;
  	pid_t pid;
  	int sta;
  
  	pw = getpwnam("nobody");
  
  	if (pw == NULL)
  		return false;
  
  	pid = fork();
  
  	if (pid < 0)
  		return false;
  
  	if (pid == 0) {
  
  		if (fuid != NULL && (*fuid)(pw->pw_uid) != 0)
  			_exit(EXIT_FAILURE);
  
  		if (fgid != NULL && (*fgid)(pw->pw_gid) != 0)
  			_exit(EXIT_FAILURE);
  
  		if (issetugid() != 1)
  			_exit(EXIT_FAILURE);
  
  		_exit(EXIT_SUCCESS);
  	}
  
  	(void)wait(&sta);
  
  	if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS)
  		return false;
  
  	return true;
  }
  
  ATF_TC(issetugid_egid);
  ATF_TC_HEAD(issetugid_egid, tc)
  {
  	atf_tc_set_md_var(tc, "descr", "A test of issetugid(2), eff. GID");
  	atf_tc_set_md_var(tc, "require.user", "root");
  }
  
  ATF_TC_BODY(issetugid_egid, tc)
  {
  
  	if (check(NULL, setegid) != true)
  		atf_tc_fail("issetugid(2) failed with effective GID");
  }
  
  ATF_TC(issetugid_euid);
  ATF_TC_HEAD(issetugid_euid, tc)
  {
  	atf_tc_set_md_var(tc, "descr", "A test of issetugid(2), eff. UID");
  	atf_tc_set_md_var(tc, "require.user", "root");
  }
  
  ATF_TC_BODY(issetugid_euid, tc)
  {
  
  	if (check(seteuid, NULL) != true)
  		atf_tc_fail("issetugid(2) failed with effective UID");
  }
  
  ATF_TC(issetugid_rgid);
  ATF_TC_HEAD(issetugid_rgid, tc)
  {
  	atf_tc_set_md_var(tc, "descr", "A test of issetugid(2), real GID");
  	atf_tc_set_md_var(tc, "require.user", "root");
  }
  
  ATF_TC_BODY(issetugid_rgid, tc)
  {
  
  	if (check(NULL, setgid) != true)
  		atf_tc_fail("issetugid(2) failed with real GID");
  }
  
  ATF_TC(issetugid_ruid);
  ATF_TC_HEAD(issetugid_ruid, tc)
  {
  	atf_tc_set_md_var(tc, "descr", "A test of issetugid(2), real UID");
  	atf_tc_set_md_var(tc, "require.user", "root");
  }
  
  ATF_TC_BODY(issetugid_ruid, tc)
  {
  
  	if (check(setuid, NULL) != true)
  		atf_tc_fail("issetugid(2) failed with real UID");
  }
  
  ATF_TP_ADD_TCS(tp)
  {
  
  	ATF_TP_ADD_TC(tp, issetugid_egid);
  	ATF_TP_ADD_TC(tp, issetugid_euid);
  	ATF_TP_ADD_TC(tp, issetugid_rgid);
  	ATF_TP_ADD_TC(tp, issetugid_ruid);
  
  	return atf_no_error();
  }
  