1  /* $NetBSD: t_realpath.c,v 1.2 2012/03/27 07:54:58 njoly Exp $ */
  2  
  3  /*-
  4   * Copyright (c) 2012 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_realpath.c,v 1.2 2012/03/27 07:54:58 njoly Exp $");
 33  
 34  #include <sys/param.h>
 35  
 36  #include <fcntl.h>
 37  #include <stdio.h>
 38  #include <stdlib.h>
 39  #include <string.h>
 40  #include <unistd.h>
 41  
 42  #include <darwintest.h>
 43  #include <darwintest_utils.h>
 44  
 45  struct testcase {
 46  	const char *path;
 47  	const char *result;
 48  };
 49  
 50  static const struct testcase paths[] = {
 51  	{ "/",			"/"		},
 52  	{ "///////",		"/"		},
 53  	{ "",			NULL		},
 54  	{ "       ",		NULL		},
 55  	{ "/      ",		NULL		},
 56  	{ "      /",		NULL		},
 57  	{ "/usr/bin///",	"/usr/bin"	},
 58  	{ "///////usr",		"/usr"		},
 59  	{ "/a/b/c/d/e",		NULL		},
 60  	{ "    /usr/bin	   ",	NULL		},
 61  	{ "\\//////usr//bin",	NULL		},
 62  	{ "//usr//bin//",	"/usr/bin"	},
 63  	{ "//////usr//bin//",	"/usr/bin"	},
 64  	{ "/usr/bin//////////", "/usr/bin"	},
 65  };
 66  
 67  T_DECL(realpath_basic, "Resolve various short directory paths")
 68  {
 69  	char buf[MAXPATHLEN];
 70  	char *ptr;
 71  	size_t i;
 72  
 73  	size_t num_cases = sizeof(paths) / sizeof(struct testcase);
 74  	for (i = 0; i < num_cases; i++) {
 75  
 76  		(void)memset(buf, '\0', sizeof(buf));
 77  
 78  		ptr = realpath(paths[i].path, buf);
 79  
 80  		if (paths[i].result == NULL) {
 81  			T_EXPECT_NULL(ptr, NULL);
 82  		} else {
 83  			T_EXPECT_EQ_STR(ptr, paths[i].result, "Real path matches expected path");
 84  		}
 85  	}
 86  }
 87  
 88  T_DECL(realpath_trailing, "Trailing . and .. should fail after non-directories")
 89  {
 90  	char result[MAXPATHLEN] = { 0 };
 91  
 92  	T_EXPECT_NULL(realpath("/usr/null/.", result), NULL);
 93  	T_EXPECT_NULL(realpath("/usr/null/..", result), NULL);
 94  }
 95  
 96  T_DECL(realpath_huge, "Test realpath with maximum path size")
 97  {
 98  	char result[MAXPATHLEN] = { 0 };
 99  	char buffer[MAXPATHLEN] = { 0 };
100  
101  	(void)memset(buffer, '/', sizeof(buffer) - 1);
102  
103  	T_EXPECT_NOTNULL(realpath(buffer, result), NULL);
104  	T_EXPECT_EQ(strlen(result), (size_t) 1, NULL);
105  	T_EXPECT_EQ(result[0], '/', NULL);
106  }
107  
108  T_DECL(realpath_symlink, "Resolve symlinked paths")
109  {
110  	char *resolved_tmpdir;
111  	char path[MAXPATHLEN] = { 0 };
112  	char slnk[MAXPATHLEN] = { 0 };
113  	char resb[MAXPATHLEN] = { 0 };
114  	int fd;
115  
116  	// We have to use the realpath for this symlink test.
117  	// Otherwise, when trying to resolve a symlink, it won't match.
118  	resolved_tmpdir = realpath(dt_tmpdir(), NULL);
119  	snprintf(path, sizeof(path), "%s%s", resolved_tmpdir, "/real");
120  	snprintf(slnk, sizeof(path), "%s%s", resolved_tmpdir, "/sym");
121  
122  	fd = open(path, O_RDONLY | O_CREAT, 0600);
123  
124  	T_WITH_ERRNO;
125  	T_ASSERT_GE(fd, 0, NULL);
126  	T_ASSERT_POSIX_ZERO(symlink(path, slnk), NULL);
127  	T_ASSERT_POSIX_ZERO(close(fd), NULL);
128  
129  	T_ASSERT_NOTNULL(realpath(slnk, resb), NULL);
130  	T_ASSERT_EQ_STR(resb, path, NULL);
131  
132  	T_ASSERT_POSIX_ZERO(unlink(path), NULL);
133  	T_ASSERT_POSIX_ZERO(unlink(slnk), NULL);
134  	free(resolved_tmpdir);
135  }