tests/realpath.c

   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 }