text: /* $NetBSD: t_unlink.c,v 1.4 2017/01/14 20:55:26 christos 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_unlink.c,v 1.4 2017/01/14 20:55:26 christos Exp $");
  
  #include <sys/stat.h>
  
  #include <atf-c.h>
  #include <errno.h>
  #include <fcntl.h>
  #include <limits.h>
  #include <string.h>
  #include <unistd.h>
  
  static char	 path[] = "unlink";
  
  ATF_TC_WITH_CLEANUP(unlink_basic);
  ATF_TC_HEAD(unlink_basic, tc)
  {
  	atf_tc_set_md_var(tc, "descr", "A basic test of unlink(2)");
  }
  
  ATF_TC_BODY(unlink_basic, tc)
  {
  	const size_t n = 512;
  	size_t i;
  	int fd;
  
  	for (i = 0; i < n; i++) {
  
  		fd = open(path, O_RDWR | O_CREAT, 0666);
  
  		ATF_REQUIRE(fd != -1);
  		ATF_REQUIRE(close(fd) == 0);
  		ATF_REQUIRE(unlink(path) == 0);
  
  		errno = 0;
  		ATF_REQUIRE_ERRNO(ENOENT, open(path, O_RDONLY) == -1);
  	}
  }
  
  ATF_TC_CLEANUP(unlink_basic, tc)
  {
  	(void)unlink(path);
  }
  
  ATF_TC_WITH_CLEANUP(unlink_err);
  ATF_TC_HEAD(unlink_err, tc)
  {
  	atf_tc_set_md_var(tc, "descr", "Test error conditions of unlink(2)");
  }
  
  ATF_TC_BODY(unlink_err, tc)
  {
  	char buf[PATH_MAX + 1];
  
  	(void)memset(buf, 'x', sizeof(buf));
  
  	errno = 0;
  #ifdef __FreeBSD__
  	ATF_REQUIRE_ERRNO(EISDIR, unlink("/") == -1);
  #else
  	ATF_REQUIRE_ERRNO(EBUSY, unlink("/") == -1);
  #endif
  
  	errno = 0;
  	ATF_REQUIRE_ERRNO(ENAMETOOLONG, unlink(buf) == -1);
  
  	errno = 0;
  	ATF_REQUIRE_ERRNO(ENOENT, unlink("/a/b/c/d/e/f/g/h/i/j/k/l/m") == -1);
  }
  
  ATF_TC_CLEANUP(unlink_err, tc)
  {
  	(void)unlink(path);
  }
  
  ATF_TC_WITH_CLEANUP(unlink_fifo);
  ATF_TC_HEAD(unlink_fifo, tc)
  {
  	atf_tc_set_md_var(tc, "descr", "Test unlink(2) for a FIFO");
  }
  
  ATF_TC_BODY(unlink_fifo, tc)
  {
  
  	ATF_REQUIRE(mkfifo(path, 0666) == 0);
  	ATF_REQUIRE(unlink(path) == 0);
  
  	errno = 0;
  	ATF_REQUIRE_ERRNO(ENOENT, open(path, O_RDONLY) == -1);
  }
  
  ATF_TC_CLEANUP(unlink_fifo, tc)
  {
  	(void)unlink(path);
  }
  
  ATF_TC_WITH_CLEANUP(unlink_perm);
  ATF_TC_HEAD(unlink_perm, tc)
  {
  	atf_tc_set_md_var(tc, "descr", "Test permissions with unlink(2)");
  	atf_tc_set_md_var(tc, "require.user", "unprivileged");
  }
  
  ATF_TC_BODY(unlink_perm, tc)
  {
  	int rv;
  
  	errno = 0;
  	rv = unlink("/etc");
  	ATF_REQUIRE_MSG(rv == -1 && (errno == EACCES || errno == EPERM),
  	    "unlinking a directory did not fail with EPERM or EACCESS; "
  	    "unlink() returned %d, errno %d", rv, errno);
  
  	errno = 0;
  	ATF_REQUIRE_ERRNO(EACCES, unlink("/root/.profile") == -1);
  }
  
  ATF_TC_CLEANUP(unlink_perm, tc)
  {
  	(void)unlink(path);
  }
  
  ATF_TP_ADD_TCS(tp)
  {
  
  	ATF_TP_ADD_TC(tp, unlink_basic);
  	ATF_TP_ADD_TC(tp, unlink_err);
  	ATF_TP_ADD_TC(tp, unlink_fifo);
  	ATF_TP_ADD_TC(tp, unlink_perm);
  
  	return atf_no_error();
  }
  