| 1 | /* $Id: tstRTSymlink.cpp 96407 2022-08-22 17:43:14Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT Testcase - Symbolic Links.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2010-2022 Oracle and/or its affiliates.
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| 8 | *
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| 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * The contents of this file may alternatively be used under the terms
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| 26 | * of the Common Development and Distribution License Version 1.0
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| 27 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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| 28 | * in the VirtualBox distribution, in which case the provisions of the
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| 29 | * CDDL are applicable instead of those of the GPL.
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| 30 | *
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| 31 | * You may elect to license modified versions of this file under the
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| 32 | * terms and conditions of either the GPL or the CDDL or both.
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| 33 | *
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| 34 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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| 35 | */
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| 36 |
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| 37 |
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| 38 | /*********************************************************************************************************************************
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| 39 | * Header Files *
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| 40 | *********************************************************************************************************************************/
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| 41 | #include <iprt/symlink.h>
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| 42 |
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| 43 | #include <iprt/test.h>
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| 44 | #include <iprt/dir.h>
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| 45 | #include <iprt/err.h>
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| 46 | #include <iprt/file.h>
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| 47 | #include <iprt/param.h>
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| 48 | #include <iprt/path.h>
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| 49 | #include <iprt/process.h>
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| 50 | #include <iprt/string.h>
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| 51 | #include <iprt/initterm.h>
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| 52 |
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| 53 |
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| 54 | static void test1Worker(RTTEST hTest, const char *pszBaseDir,
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| 55 | const char *pszTarget, RTSYMLINKTYPE enmType, bool fDangling)
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| 56 | {
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| 57 | char szPath1[RTPATH_MAX];
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| 58 | char szPath2[RTPATH_MAX];
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| 59 | size_t cchTarget = strlen(pszTarget);
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| 60 | char szPath3[RTPATH_MAX];
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| 61 |
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| 62 | RTStrCopy(szPath3, sizeof(szPath3), pszTarget);
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| 63 |
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| 64 | #ifdef RT_OS_WINDOWS
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| 65 | /* see RTSymlinkCreate in symlink-win.cpp */
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| 66 | char c;
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| 67 | char *psz = szPath3;
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| 68 | while ((c = *psz) != '\0')
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| 69 | {
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| 70 | if (c == '/')
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| 71 | *psz = '\\';
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| 72 | psz++;
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| 73 | }
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| 74 | #endif
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| 75 |
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| 76 | /* Create it.*/
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| 77 | RTTESTI_CHECK_RC_OK_RETV(RTPathJoin(szPath1, sizeof(szPath1), pszBaseDir, "tstRTSymlink-link-1"));
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| 78 | RTSymlinkDelete(szPath1, 0); /* clean up previous run */
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| 79 | int rc = RTSymlinkCreate(szPath1, pszTarget, enmType, 0);
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| 80 | if (rc == VERR_NOT_SUPPORTED)
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| 81 | {
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| 82 | RTTestPrintf(hTest, RTTESTLVL_ALWAYS, "VERR_NOT_SUPPORTED - skipping\n");
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| 83 | return;
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| 84 | }
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| 85 | RTTESTI_CHECK_RC_RETV(rc, VINF_SUCCESS);
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| 86 |
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| 87 | /* Check the predicate functions. */
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| 88 | RTTESTI_CHECK(RTSymlinkExists(szPath1));
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| 89 | RTTESTI_CHECK(RTSymlinkIsDangling(szPath1) == fDangling);
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| 90 |
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| 91 | /* Read it. */
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| 92 | memset(szPath2, 0xff, sizeof(szPath2));
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| 93 | szPath2[sizeof(szPath2) - 1] = '\0';
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| 94 | RTTESTI_CHECK_RC(RTSymlinkRead(szPath1, szPath2, sizeof(szPath2), 0), VINF_SUCCESS);
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| 95 | RTTESTI_CHECK_MSG(strcmp(szPath2, szPath3) == 0, ("got=\"%s\" expected=\"%s\"", szPath2, szPath3));
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| 96 |
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| 97 | memset(szPath2, 0xff, sizeof(szPath2));
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| 98 | szPath2[sizeof(szPath2) - 1] = '\0';
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| 99 | RTTESTI_CHECK_RC(RTSymlinkRead(szPath1, szPath2, cchTarget + 1, 0), VINF_SUCCESS);
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| 100 | RTTESTI_CHECK_MSG(strcmp(szPath2, szPath3) == 0, ("got=\"%s\" expected=\"%s\"", szPath2, szPath3));
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| 101 |
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| 102 | memset(szPath2, 0xff, sizeof(szPath2));
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| 103 | szPath2[sizeof(szPath2) - 1] = '\0';
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| 104 | RTTESTI_CHECK_RC(RTSymlinkRead(szPath1, szPath2, cchTarget, 0), VERR_BUFFER_OVERFLOW);
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| 105 | RTTESTI_CHECK_MSG( strncmp(szPath2, szPath3, cchTarget - 1) == 0
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| 106 | && szPath2[cchTarget - 1] == '\0',
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| 107 | ("got=\"%s\" expected=\"%.*s\"", szPath2, cchTarget - 1, szPath3));
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| 108 |
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| 109 | /* Other APIs that have to handle symlinks carefully. */
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| 110 | RTFSOBJINFO ObjInfo;
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| 111 | RTTESTI_CHECK_RC(rc = RTPathQueryInfo(szPath1, &ObjInfo, RTFSOBJATTRADD_NOTHING), VINF_SUCCESS);
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| 112 | if (RT_SUCCESS(rc))
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| 113 | RTTESTI_CHECK(RTFS_IS_SYMLINK(ObjInfo.Attr.fMode));
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| 114 | RTTESTI_CHECK_RC(rc = RTPathQueryInfoEx(szPath1, &ObjInfo, RTFSOBJATTRADD_NOTHING, RTPATH_F_ON_LINK), VINF_SUCCESS);
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| 115 | if (RT_SUCCESS(rc))
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| 116 | RTTESTI_CHECK(RTFS_IS_SYMLINK(ObjInfo.Attr.fMode));
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| 117 |
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| 118 | if (!fDangling)
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| 119 | {
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| 120 | RTTESTI_CHECK_RC(rc = RTPathQueryInfoEx(szPath1, &ObjInfo, RTFSOBJATTRADD_NOTHING, RTPATH_F_FOLLOW_LINK), VINF_SUCCESS);
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| 121 | if (RT_SUCCESS(rc))
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| 122 | RTTESTI_CHECK(!RTFS_IS_SYMLINK(ObjInfo.Attr.fMode));
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| 123 | else
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| 124 | RT_ZERO(ObjInfo);
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| 125 |
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| 126 | if (enmType == RTSYMLINKTYPE_DIR)
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| 127 | {
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| 128 | RTTESTI_CHECK(RTDirExists(szPath1));
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| 129 | RTTESTI_CHECK(RTFS_IS_DIRECTORY(ObjInfo.Attr.fMode));
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| 130 | }
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| 131 | else if (enmType == RTSYMLINKTYPE_FILE)
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| 132 | {
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| 133 | RTTESTI_CHECK(RTFileExists(szPath1));
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| 134 | RTTESTI_CHECK(RTFS_IS_FILE(ObjInfo.Attr.fMode));
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| 135 | }
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| 136 |
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| 137 | /** @todo Check more APIs */
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| 138 | }
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| 139 |
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| 140 | /* Finally, the removal of the symlink. */
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| 141 | RTTESTI_CHECK_RC(RTSymlinkDelete(szPath1, 0), VINF_SUCCESS);
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| 142 | RTTESTI_CHECK_RC(RTSymlinkDelete(szPath1, 0), VERR_FILE_NOT_FOUND);
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| 143 | }
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| 144 |
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| 145 |
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| 146 | static void test1(RTTEST hTest, const char *pszBaseDir)
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| 147 | {
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| 148 | char szPath1[RTPATH_MAX];
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| 149 |
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| 150 | /*
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| 151 | * Making some assumptions about how we are executed from to start with...
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| 152 | */
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| 153 | RTTestISub("Negative RTSymlinkRead, Exists & IsDangling");
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| 154 | char szExecDir[RTPATH_MAX];
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| 155 | RTTESTI_CHECK_RC_OK_RETV(RTPathExecDir(szExecDir, sizeof(szExecDir)));
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| 156 | RTTESTI_CHECK(RTDirExists(szExecDir));
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| 157 |
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| 158 | char szExecFile[RTPATH_MAX];
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| 159 | RTTESTI_CHECK_RETV(RTProcGetExecutablePath(szExecFile, sizeof(szExecFile)) != NULL);
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| 160 | RTTESTI_CHECK(RTFileExists(szExecFile));
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| 161 |
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| 162 | RTTESTI_CHECK(!RTSymlinkExists(szExecFile));
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| 163 | RTTESTI_CHECK(!RTSymlinkExists(szExecDir));
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| 164 | RTTESTI_CHECK(!RTSymlinkIsDangling(szExecFile));
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| 165 | RTTESTI_CHECK(!RTSymlinkIsDangling(szExecDir));
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| 166 | RTTESTI_CHECK(!RTSymlinkExists("/"));
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| 167 | RTTESTI_CHECK(!RTSymlinkIsDangling("/"));
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| 168 | RTTESTI_CHECK(!RTSymlinkExists("/some/non-existing/directory/name/iprt"));
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| 169 | RTTESTI_CHECK(!RTSymlinkExists("/some/non-existing/directory/name/iprt/"));
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| 170 | RTTESTI_CHECK(!RTSymlinkIsDangling("/some/non-existing/directory/name/iprt"));
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| 171 | RTTESTI_CHECK(!RTSymlinkIsDangling("/some/non-existing/directory/name/iprt/"));
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| 172 |
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| 173 | RTTESTI_CHECK_RC(RTSymlinkRead(szExecFile, szPath1, sizeof(szPath1), 0), VERR_NOT_SYMLINK);
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| 174 | RTTESTI_CHECK_RC(RTSymlinkRead(szExecDir, szPath1, sizeof(szPath1), 0), VERR_NOT_SYMLINK);
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| 175 |
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| 176 | /*
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| 177 | * Do some symlinking. ASSUME they are supported on the test file system.
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| 178 | */
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| 179 | RTTestISub("Basics");
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| 180 | RTTESTI_CHECK_RETV(RTDirExists(pszBaseDir));
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| 181 | test1Worker(hTest, pszBaseDir, szExecFile, RTSYMLINKTYPE_FILE, false /*fDangling*/);
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| 182 | test1Worker(hTest, pszBaseDir, szExecDir, RTSYMLINKTYPE_DIR, false /*fDangling*/);
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| 183 | test1Worker(hTest, pszBaseDir, szExecFile, RTSYMLINKTYPE_UNKNOWN, false /*fDangling*/);
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| 184 | test1Worker(hTest, pszBaseDir, szExecDir, RTSYMLINKTYPE_UNKNOWN, false /*fDangling*/);
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| 185 |
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| 186 | /*
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| 187 | * Create a few dangling links.
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| 188 | */
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| 189 | RTTestISub("Dangling links");
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| 190 | test1Worker(hTest, pszBaseDir, "../dangle/dangle", RTSYMLINKTYPE_FILE, true /*fDangling*/);
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| 191 | test1Worker(hTest, pszBaseDir, "../dangle/dangle", RTSYMLINKTYPE_DIR, true /*fDangling*/);
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| 192 | test1Worker(hTest, pszBaseDir, "../dangle/dangle", RTSYMLINKTYPE_UNKNOWN, true /*fDangling*/);
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| 193 | test1Worker(hTest, pszBaseDir, "../dangle/dangle/", RTSYMLINKTYPE_UNKNOWN, true /*fDangling*/);
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| 194 | }
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| 195 |
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| 196 |
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| 197 | int main()
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| 198 | {
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| 199 | RTTEST hTest;
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| 200 | int rc = RTTestInitAndCreate("tstRTSymlink", &hTest);
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| 201 | if (rc)
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| 202 | return rc;
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| 203 | RTTestBanner(hTest);
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| 204 |
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| 205 | test1(hTest, ".");
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| 206 |
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| 207 | return RTTestSummaryAndDestroy(hTest);
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| 208 | }
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| 209 |
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